Goal is to capture video from my old usb webcam (device 0733:0430). Trying to save video gives this error. (I've tried both ffmpeg and avconv.) Command ffmpeg -f v4l2 -i /dev/video2 -s 160x120 tmp.mkv [video4linux2,v4l2 @ 0x815280] Time per frame unknown [video4linux2,v4l2 @ 0x815280] Cannot find a proper format for codec 'none' (id 0), pixel format 'none' (id -1) Assertion *codec_id != AV_CODEC_ID_NONE failed at /build/buildd/ffmpeg-2.3/libavdevice/v4l2.c:802 I know it can work on Linux, because I had it running a few years ago. How to get it to work now? ---- **Below is information about the device.** Device dmesg output [53008.270283] usb 2-1.2: new full-speed USB device number 4 using ehci-pci [53008.363405] usb 2-1.2: New USB device found, idVendor=0733, idProduct=0430 [53008.363416] usb 2-1.2: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [53008.779745] gspca_main: v2.14.0 registered [53008.809496] gspca_main: spca505-2.14.0 probing 0733:0430 [53008.812508] usbcore: registered new interface driver spca505 ffmpeg -list_formats 1 -f v4l2 -i /dev/video2 [video4linux2,v4l2 @ 0xbed5e0] Raw : Unsupported : S505 : 160x120 176x144 320x240 352x288 v4l-info /dev/video2 ### v4l2 device info [/dev/video2] ### general info VIDIOC_QUERYCAP driver : "spca505" card : "USB Camera (0733:0430)" bus_info : "usb-0000:00:1d.0-1.2" version : 3.13.11 capabilities : 0x85000001 [VIDEO_CAPTURE,READWRITE,STREAMING,(null)] standards inputs VIDIOC_ENUMINPUT(0) index : 0 name : "spca505" type : CAMERA audioset : 0 tuner : 0 std : 0x0 [] status : 0x0 [] video capture VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE) index : 0 type : VIDEO_CAPTURE flags : 0 description : "S505" pixelformat : 0x35303553 [S505] VIDIOC_G_FMT(VIDEO_CAPTURE) type : VIDEO_CAPTURE fmt.pix.width : 160 fmt.pix.height : 120 fmt.pix.pixelformat : 0x35303553 [S505] fmt.pix.field : NONE fmt.pix.bytesperline : 160 fmt.pix.sizeimage : 28800 fmt.pix.colorspace : SRGB fmt.pix.priv : 0 controls VIDIOC_QUERYCTRL(BASE+0) id : 9963776 type : INTEGER name : "Brightness" minimum : 0 maximum : 255 step : 1 default_value : 127 flags : 32

On Linux my webcam works fine, but when using artificial lighting the white-balance is too reddish. Color look fine with natural illumination. Is there a way to calibrate the colors or have some form of auto-adjustment which works? I used guvcview to tinker with the settings but haven't managed to find a suitable combination of settings to show natural colors.

I am unable to send a stream to my ffserver. I started the server with ffserver -f /etc/ffserver.conf & where ffserver.conf has not been modified. I tried sending a webcam stream with ffmpeg -f alsa -ac 2 -i plughw:0,0 -f video4linux2 -s vga -i /dev/video0 http://localhost:8090/feed1.ffm I have however the following error: [...] [tcp @ 0x560e1234c6e0] Connection to tcp://localhost:8090 failed (Connection refused), trying next address [...] MPEG-1/2 does not support 3/1 fps [...] The port 9080 is open, as seen with nmap localhost **Why do I have this error and how to send my stream?** ----------------------------- **Full output:** # ffmpeg -f alsa -ac 2 -i plughw:0,0 -f video4linux2 -s vga -i /dev/video0 http://localhost:8090/feed1.ffm ffmpeg version 3.2.1-1 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 6.2.1 (Debian 6.2.1-5) 20161124 configuration: --prefix=/usr --extra-version=1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-libtesseract --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-libopencv --enable-frei0r --enable-libx264 --enable-chromaprint --enable-shared libavutil 55. 34.100 / 55. 34.100 libavcodec 57. 64.101 / 57. 64.101 libavformat 57. 56.100 / 57. 56.100 libavdevice 57. 1.100 / 57. 1.100 libavfilter 6. 65.100 / 6. 65.100 libavresample 3. 1. 0 / 3. 1. 0 libswscale 4. 2.100 / 4. 2.100 libswresample 2. 3.100 / 2. 3.100 libpostproc 54. 1.100 / 54. 1.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, alsa, from 'plughw:0,0': Duration: N/A, start: 1481703954.356244, bitrate: 1536 kb/s Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Input #1, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 41830.241126, bitrate: 147456 kb/s Stream #1:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc [tcp @ 0x560e6432c6e0] Connection to tcp://localhost:8090 failed (Connection refused), trying next address [tcp @ 0x560e64345a40] Connection to tcp://localhost:8090 failed (Connection refused), trying next address [mpeg1video @ 0x560e6435fb20] bitrate tolerance 21333 too small for bitrate 64000, overriding [mpeg1video @ 0x560e6435fb20] MPEG-1/2 does not support 3/1 fps Stream mapping: Stream #0:0 -> #0:0 (pcm_s16le (native) -> mp2 (native)) Stream #1:0 -> #0:1 (rawvideo (native) -> mpeg1video (native)) Stream #0:0 -> #0:2 (pcm_s16le (native) -> wmav2 (native)) Stream #1:0 -> #0:3 (rawvideo (native) -> msmpeg4v3 (msmpeg4)) Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height **Full /etc/ffserver.conf** (no modification from original file): HTTPPort 8090 HTTPBindAddress 0.0.0.0 MaxHTTPConnections 2000 MaxClients 1000 MaxBandwidth 1000 CustomLog - File /tmp/feed1.ffm FileMaxSize 200K ACL allow 127.0.0.1 Feed feed1.ffm Format mpeg AudioBitRate 32 AudioChannels 1 AudioSampleRate 44100 VideoBitRate 64 VideoBufferSize 40 VideoFrameRate 3 VideoSize 160x128 VideoGopSize 12 Feed feed1.ffm Format asf VideoFrameRate 15 VideoSize 352x240 VideoBitRate 256 VideoBufferSize 40 VideoGopSize 30 AudioBitRate 64 StartSendOnKey Format status ACL allow localhost ACL allow 192.168.0.0 192.168.255.255 URL http://www.ffmpeg.org/

I have a Thinkpad X1 Tablet (gen 2) with a front and back integrated camera running Ubuntu 19:10. The cameras appear to be detected: > $ v4l-info > > ### v4l2 device info [/dev/video0] ### > general info > VIDIOC_QUERYCAP > driver : "ipu3-cio2" > card : "Intel > IPU3 CIO2" bus_info : "PCI:0000:00:14.3" > version : 5.3.18 > capabilities : 0x84201000 [?,?,STREAMING,(null)] > > standards > > inputs > VIDIOC_ENUMINPUT(0) > index : 0 > name : "camera" > type : CAMERA > audioset : 0 > tuner : 0 > std : 0x0 [] > status : 0x0 [] > > controls When I start cheese I have 4 cameras labeled "ipu3-imgu". When I run guvcview I have 10 devices labeled "ipu3-imgu" which the system puts at /dev/video0-9 and four devices labeled "Intel IPU3 CIO2" which are /dev/video10-13. But none of these work. Does anyone have a laptop with this kind of camera running Linux? Does anyone know of a resource on debugging this kind of camera in Linux?

I am trying to redirect USB through Remmina to an RDP session (FreeRDP on Linux). Access to the usb camera works just fine when I run Remmina as root, which is not an ideal scenario for obvious reasons. I need to allow my normal user access to this device when running Remmina as a normal user. So, I have tried the following: - Adding my user to the video group, then logging out/in - Changing permissions of /dev/video0, to 777 for good measure and then work my way back from there. Here are the previous permissions of /dev/video0:

$ ls -a -l /dev/video0
crw-rw----+ 1 root video 81, 0 Jul 25 08:36 /dev/video0

Then I ran: $ sudo chmod 777 /dev/video0 Permissions again after running the above command:

$ ls -a -l /dev/video0
crwxrwxrwx+ 1 root video 81, 0 Jul 25 08:36 /dev/video0

Before doing any of these permissions changes, I simply added my user to the video group and logged out/in. Output from lsusb relevant to my device: Bus 003 Device 003: ID 046d:0892 Logitech, Inc. C920 HD Pro Webcam Options used in Remmina: USB device Redirection: id:046d:0892,addr:003:003 Error output from Remmina:

[08:57:34:285] [1821:1848] [INFO][com.freerdp.channels.urbdrc.client] - VID: 0x046D, PID: 0x0892
[08:57:34:285] [1821:1848] [ERROR][com.freerdp.channels.urbdrc.client] - libusb_open: error LIBUSB_ERROR_ACCESS[-3]
[08:57:34:285] [1821:1848] [ERROR][com.freerdp.channels.urbdrc.client] - libusb_open [b=0x03,p=0x06,a=0x03,VID=0x046D,PID=0x0892]: error LIBUSB_ERROR_ACCESS[-3]
[08:57:34:285] [1821:1848] [ERROR][com.freerdp.channels.urbdrc.client] - libusb_open: error LIBUSB_ERROR_ACCESS[-3]
[08:57:34:285] [1821:1848] [ERROR][com.freerdp.channels.urbdrc.client] - libusb_open [b=0x03,p=0x06,a=0x03,VID=0x046D,PID=0x0892]: error LIBUSB_ERROR_ACCESS[-3]

**EDIT**: Output from: $ udevadm info -a /dev/video0

looking at device '/devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/video4linux/video0':
    KERNEL=="video0"
    SUBSYSTEM=="video4linux"
    DRIVER==""
    ATTR{dev_debug}=="0"
    ATTR{index}=="0"
    ATTR{name}=="HD Pro Webcam C920"
    ATTR{power/control}=="auto"
    ATTR{power/runtime_active_time}=="0"
    ATTR{power/runtime_status}=="unsupported"
    ATTR{power/runtime_suspended_time}=="0"

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0':
    KERNELS=="3-6:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="uvcvideo"
    ATTRS{authorized}=="1"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceClass}=="0e"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bInterfaceProtocol}=="00"
    ATTRS{bInterfaceSubClass}=="01"
    ATTRS{bNumEndpoints}=="01"
    ATTRS{iad_bFirstInterface}=="00"
    ATTRS{iad_bFunctionClass}=="0e"
    ATTRS{iad_bFunctionProtocol}=="00"
    ATTRS{iad_bFunctionSubClass}=="03"
    ATTRS{iad_bInterfaceCount}=="02"
    ATTRS{supports_autosuspend}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb3/3-6':
    KERNELS=="3-6"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="ef"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="02"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="500mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 4"
    ATTRS{bcdDevice}=="0019"
    ATTRS{bmAttributes}=="80"
    ATTRS{busnum}=="3"
    ATTRS{configuration}==""
    ATTRS{devnum}=="3"
    ATTRS{devpath}=="6"
    ATTRS{idProduct}=="0892"
    ATTRS{idVendor}=="046d"
    ATTRS{ltm_capable}=="no"
    ATTRS{maxchild}=="0"
    ATTRS{power/active_duration}=="1610000"
    ATTRS{power/autosuspend}=="2"
    ATTRS{power/autosuspend_delay_ms}=="2000"
    ATTRS{power/connected_duration}=="2594730"
    ATTRS{power/control}=="auto"
    ATTRS{power/level}=="auto"
    ATTRS{power/persist}=="1"
    ATTRS{power/runtime_active_time}=="1610678"
    ATTRS{power/runtime_status}=="suspended"
    ATTRS{power/runtime_suspended_time}=="983716"
    ATTRS{product}=="HD Pro Webcam C920"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{rx_lanes}=="1"
    ATTRS{serial}=="66BA81DF"
    ATTRS{speed}=="480"
    ATTRS{tx_lanes}=="1"
    ATTRS{urbnum}=="1561744"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb3':
    KERNELS=="usb3"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0510"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="3"
    ATTRS{configuration}==""
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{idProduct}=="0002"
    ATTRS{idVendor}=="1d6b"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Linux 5.10.52-1-lts xhci-hcd"
    ATTRS{maxchild}=="15"
    ATTRS{power/active_duration}=="2595210"
    ATTRS{power/autosuspend}=="0"
    ATTRS{power/autosuspend_delay_ms}=="0"
    ATTRS{power/connected_duration}=="2595210"
    ATTRS{power/control}=="auto"
    ATTRS{power/level}=="auto"
    ATTRS{power/runtime_active_time}=="2595211"
    ATTRS{power/runtime_status}=="active"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{power/wakeup}=="disabled"
    ATTRS{power/wakeup_abort_count}==""
    ATTRS{power/wakeup_active}==""
    ATTRS{power/wakeup_active_count}==""
    ATTRS{power/wakeup_count}==""
    ATTRS{power/wakeup_expire_count}==""
    ATTRS{power/wakeup_last_time_ms}==""
    ATTRS{power/wakeup_max_time_ms}==""
    ATTRS{power/wakeup_total_time_ms}==""
    ATTRS{product}=="xHCI Host Controller"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{rx_lanes}=="1"
    ATTRS{serial}=="0000:00:14.0"
    ATTRS{speed}=="480"
    ATTRS{tx_lanes}=="1"
    ATTRS{urbnum}=="147"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/pci0000:00/0000:00:14.0':
    KERNELS=="0000:00:14.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="xhci_hcd"
    ATTRS{ari_enabled}=="0"
    ATTRS{broken_parity_status}=="0"
    ATTRS{class}=="0x0c0330"
    ATTRS{consistent_dma_mask_bits}=="64"
    ATTRS{d3cold_allowed}=="1"
    ATTRS{device}=="0x8c31"
    ATTRS{dma_mask_bits}=="64"
    ATTRS{driver_override}=="(null)"
    ATTRS{enable}=="1"
    ATTRS{irq}=="27"
    ATTRS{local_cpulist}=="0-3"
    ATTRS{local_cpus}=="f"
    ATTRS{msi_bus}=="1"
    ATTRS{msi_irqs/27}=="msi"
    ATTRS{numa_node}=="-1"
    ATTRS{power/control}=="on"
    ATTRS{power/runtime_active_time}=="2596888"
    ATTRS{power/runtime_status}=="active"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{power/wakeup}=="enabled"
    ATTRS{power/wakeup_abort_count}=="0"
    ATTRS{power/wakeup_active}=="0"
    ATTRS{power/wakeup_active_count}=="0"
    ATTRS{power/wakeup_count}=="0"
    ATTRS{power/wakeup_expire_count}=="0"
    ATTRS{power/wakeup_last_time_ms}=="0"
    ATTRS{power/wakeup_max_time_ms}=="0"
    ATTRS{power/wakeup_total_time_ms}=="0"
    ATTRS{revision}=="0x05"
    ATTRS{subsystem_device}=="0x220e"
    ATTRS{subsystem_vendor}=="0x17aa"
    ATTRS{vendor}=="0x8086"

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""
    ATTRS{power/control}=="auto"
    ATTRS{power/runtime_active_time}=="0"
    ATTRS{power/runtime_status}=="unsupported"
    ATTRS{power/runtime_suspended_time}=="0"

I would use a USB webcam with Motion software, installed in Ubuntu on my Windows PC (WSL2 ) But when I started Motion as a service and i check on browser at the address [LOCALHOLST:port 8080 or 8081 ] it appears the Motion interface but never has been detected my webcam. Always It is showed a gray screen, for the MyCam1 option, with written at the top on the left "UNABLE TO OPEN VIDEO DEVICE". I tried many types of configurations in the camera1-dist.conf and motion.conf files, but unfortunately they still doesn't work Someone who could suggest me what type of configurations and in wich file, do I have to use to detected a USB webcam with Motion software ? Thank you in advance. Hi, many thanks your indications has been very useful! I have followed all the steps and I have attached the webcam to my Ubuntu distribution and now Ubuntu 'lsusb' comand gives the following output root@LAPTOP-5OFK2AK7:/home/daniele# lsusb Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 3443:950a SHENZHEN AONI ELECTRONIC CO.,LTD NexiGo N950P 4K Webcam Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Unfortunately it still doesn't work..Motion still showes a grey screen and the UNABLE TO OPEN VIDEO DEVICE.. I think now the problem is in the camera1-dist.conf file. I'd like to set the webcam in localhost:8080 (port) or ( 8081 ) but i don't understand, it still doesn't work what and where I have to write in this camera1-dist.conf file # This config file was generated by motion 4.2.2 ########################################################### # Configuration options specific to camera 1 ############################################################ # User defined name for the camera. camera_name MyCam1 # Numeric identifier for the camera. camera_id 101 # The full URL of the network camera stream. netcam_url http://127.0.0.1:8080 # Image width in pixels. width 1280 # Image height in pixels. height 720 # Text to be overlayed in the lower left corner of images text_left CAMERA 1 # File name(without extension) for movies relative to target directory movie_filename CAM01_%t-%v-%Y%m%d%H%M%S

Sorry about this but I'm a "newbe" at this. Would not have bothered anyone but I have need of a webcam under the present global circumstances. The only one I have is this old one (SAMSUNG TV camera model VG-STC3000/ZA). I am GUESSING that drivers are missing or something but I have no idea how to solve the problem. I'm using ubuntu 18.04.4 LTS). When I use a webcam tester I get something about permissions not allowing the use of the webcam. Any help to make it work would be most appreciated.

I have a Dell Latitude 7440 with an integrated FHD RGB + IR Camera, but there are no drivers. It's an IPU6/MIPI Intel camera.

sudo lshw -C multimedia
  *-multimedia:0 UNCLAIMED  
       description: Multimedia controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 5
       bus info: pci@0000:00:05.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress pm cap_list
       configuration: latency=0
       resources: iomemory:600-5ff memory:6052000000-6052ffffff

There is a ppa repo with the linux drivers (see a solution [here](https://askubuntu.com/questions/1473289/integrated-camera-not-working-on-dell-latitude-7440-and-7340-ubuntu-22-04)) . However this repo seems to work for Ubuntu, but not on (my) Debian (it cannot be added, when I try to add it I get AttributeError: 'NoneType' object has no attribute 'people'). Did anyone has an easy solution? I have found a quite convoluted solution [here](https://bbs.archlinux.org/viewtopic.php?id=287119) and I would like to avoid it. Any backport from Sid? I tried the backport firmware-intel-graphics (https://packages.debian.org/bookworm-backports/firmware-intel-graphics) but it did not do the job. Thanks, AB

I am looking for a Linux OS that will support my older hardware in my laptop (from 2014). I would like to have a simple, not bloated desktop, but also not too ancient-looking ;) *edit*: By "hardware" I mainly mean wifi and webcam - I do expect Linux to run on a ten-year-old cpu. Here's some more information: The laptop is an HP pro Book, in case that matters. Linux really caught me when I started to use ElementaryOS something like 15 years ago. I have been happy with ElementaryOS, but the recent versions don't seem to support my hardware. At least, it didn't work anymore after an update. So I want to move away from this. (It also doesn't support my USB camera on my computer) Last time I used Ubuntu it brought a lot of bloatware like Amazon search and strange stuff. Also I don't know how well Ubuntu supports old hardware. Maybe Debian with a modern desktop might be a solution for me? Or does this not depend on the distro, but more on something else (like the kernel)? Edit: Using a live version of Ubuntu was a good idea. I booted from it and got greeted with a "missing firmware" message that seems common (many questions on that on the internet). So I've got a starting point although I haven't yet fixed that. My webcam worked out of the box :):) yeah!

Issue with Custom CMOS Sensor on IPU1 CSI0 - No /dev/media0 Node, VIDIOC_STREAMON Fails I also tried to follow below link: https://trac.gateworks.com/wiki/linux/media Hi, I’m working on a custom i.MX6Q-based board and trying to bring up a custom CMOS parallel camera sensor connected via ipu1_csi0. I’m using a mainline kernel with the staging imx-media driver. Below is the relevant snippet from my device tree (.dtsi): dts test_cam: camera { compatible = "test,test_camera"; clocks = ; clock-names = "xvclk"; powerdown-gpios = ; reset-gpios = ; status = "okay"; port { test_cam_to_ipu1_csi0_mux: endpoint { remote-endpoint = ; link-frequencies = /bits/ 64 ; bus-width = ; hsync-active = ; vsync-active = ; }; }; }; &ipu1_csi0_from_ipu1_csi0_mux { bus-width = ; data-shift = ; // Lines 19:12 used hsync-active = ; vsync-active = ; }; &ipu1_csi0_mux_from_parallel_sensor { remote-endpoint = ; }; &ipu1_csi0 { pinctrl-names = "default"; pinctrl-0 = ; status = "okay"; }; The issue I’m facing is: /dev/media0 is not being created. When I attempt to start streaming, I see the following errors in the kernel log: ipu1_csi0: pipeline start failed with -32 VIDIOC_STREAMON returned -1 (Broken pipe) And these are some of the log messages leading up to it: imx-media capture-subsystem: walk: skipping disabled link 'ipu1_csi0':2 -> 'ipu1_csi0 capture':0 ... It appears links in the media graph are not getting enabled, which might be why the pipeline fails. My questions: Is there anything missing in the device tree for the media links to be properly enabled? Do I need to explicitly define any subdev links in the DTS or user space? How can I debug why /dev/media0 is not being created? Any guidance or pointers to working examples for a similar setup (CMOS parallel sensor + IPU1 CSI0) would be greatly appreciated. Thanks in advance!

I'm trying to find the most lightweight method to detect "adequate" change in an image. I realize that's a terrible constraint, so for the sake of this question I'll break it into two different qualifiers: substantial change, or 80% pixels changed, and motion-changed, or 10% pixels changed. These images are captured via timelapse mode on a raspberry pi camera, but for the sake of the question, _the files could be from any basically-static view point_. I've found that I can use filesize to observe change of substantial amounts:

user@host-bb:/tmp$ ls -la investigating/
total 134604
drwxr-xr-x 2 user group    4096 Oct 20 00:05 .
drwxr-xr-x 5 user group    4096 Oct 20 00:04 ..
-rw-r--r-- 1 user group 4580181 Oct 20 00:05 image1018223300.jpg
-rw-r--r-- 1 user group 4573449 Oct 20 00:05 image1018223301.jpg
-rw-r--r-- 1 user group 4573024 Oct 20 00:05 image1018223304.jpg
...snip...
-rw-r--r-- 1 user group 4455867 Oct 20 00:05 image1018223320.jpg
-rw-r--r-- 1 user group 4447607 Oct 20 00:05 image1018223321.jpg
-rw-r--r-- 1 user group 4434839 Oct 20 00:05 image1018223323.jpg
-rw-r--r-- 1 user group 4416942 Oct 20 00:05 image1018223324.jpg
-rw-r--r-- 1 user group 1769008 Oct 20 00:05 image1018223325.jpg
-rw-r--r-- 1 user group 1702851 Oct 20 00:05 image1018223326.jpg
-rw-r--r-- 1 user group 1639306 Oct 20 00:05 image1018223327.jpg
-rw-r--r-- 1 user group 1788435 Oct 20 00:05 image1018223328.jpg
-rw-r--r-- 1 user group 1908061 Oct 20 00:05 image1018223329.jpg
-rw-r--r-- 1 user group 1981029 Oct 20 00:05 image1018223330.jpg
-rw-r--r-- 1 user group 2102390 Oct 20 00:05 image1018223331.jpg
-rw-r--r-- 1 user group 2167734 Oct 20 00:05 image1018223333.jpg
-rw-r--r-- 1 user group 2243082 Oct 20 00:05 image1018223334.jpg
...snip...
-rw-r--r-- 1 user group 2640732 Oct 20 00:05 image1018223342.jpg
-rw-r--r-- 1 user group 2730206 Oct 20 00:05 image1018223343.jpg
-rw-r--r-- 1 user group 2751966 Oct 20 00:05 image1018223344.jpg
-rw-r--r-- 1 user group  315875 Oct 20 00:05 image1018223345.jpg
-rw-r--r-- 1 user group  302476 Oct 20 00:05 image1018223352.jpg
...snip...
-rw-r--r-- 1 user group  285965 Oct 20 00:05 image1018223358.jpg
-rw-r--r-- 1 user group  289271 Oct 20 00:05 image1018223359.jpg
user@host-bb:/tmp$

Even between somewhat non-major changes in lighting (such as occurred between images *28.jpg and *29.jpg) can produce a difference in filesize. I realize this is basically binning, and it could be the solution I'm looking for. This takes care of the "substantial change" (80% of pixels changed). The question remains though: Short of Imagemagick, Python script, or other image processing software, is there a lightweight way to detect change in an image that is closer to 10% pixels changed? If there is no non-image-processing software option, what would the most light-weight option be? Writing my own processing in a low-level language? A Python script? I'm coming from a Python background and am trying to do simple change detection on a raspberry pi zero w that can then trigger an event (file upload) if there is a change. Bandwidth is too small to send all the images, and the pi zero w is not a heavy hitter when it comes to processing power.

So, I have a webcam. And its LEDs are *always on*. This is a right pain; is there any way I can toggle those LEDs myself from the terminal? (The single button on the device itself does not toggle the LEDs). Here's the relevant information from lsusb -v:

Bus 002 Device 005: ID 058f:3863 Alcor Micro Corp. USB 2.0 PC Camera
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x058f Alcor Micro Corp.
  idProduct          0x3863 
  bcdDevice            0.01
  iManufacturer           1 Alcor Micro, Corp.
  iProduct                2 USB 2.0 PC Camera
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x02d4
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass         14 Video
      bFunctionSubClass       3 Video Interface Collection
      bFunctionProtocol       0 
      iFunction               4 PC Camera
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      1 Video Control
      bInterfaceProtocol      0 
      iInterface              4 PC Camera
      VideoControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdUVC               1.00
        wTotalLength       0x004f
        dwClockFrequency       30.000000MHz
        bInCollection           1
        baInterfaceNr( 0)       1
      VideoControl Interface Descriptor:
        bLength                28
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 6
        guidExtensionCode         {68bbd0b0-61a4-4b83-90b7-a6215f3c4f70}
        bNumControl            24
        bNrPins                 1
        baSourceID( 0)          2
        bControlSize            3
        bmControls( 0)       0xff
        bmControls( 1)       0xff
        bmControls( 2)       0xff
        iExtension              0 
      VideoControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Camera Sensor
        bAssocTerminal          0
        iTerminal               0 
        wObjectiveFocalLengthMin      0
        wObjectiveFocalLengthMax      0
        wOcularFocalLength            0
        bControlSize                  3
        bmControls           0x00000000
      VideoControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      5 (PROCESSING_UNIT)
      Warning: Descriptor too short
        bUnitID                 2
        bSourceID               1
        wMaxMultiplier          0
        bControlSize            2
        bmControls     0x0000157f
          Brightness
          Contrast
          Hue
          Saturation
          Sharpness
          Gamma
          White Balance Temperature
          Backlight Compensation
          Power Line Frequency
          White Balance Temperature, Auto
        iProcessing             0 
        bmVideoStandards     0x09
          None
          SECAM - 625/50
      VideoControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               2
        iTerminal               0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               7
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              4 PC Camera
      VideoStreaming Interface Descriptor:
        bLength                            15
        bDescriptorType                    36
        bDescriptorSubtype                  1 (INPUT_HEADER)
        bNumFormats                         2
        wTotalLength                   0x0191
        bEndPointAddress                  130
        bmInfo                              0
        bTerminalLink                       3
        bStillCaptureMethod                 2
        bTriggerSupport                     1
        bTriggerUsage                       0
        bControlSize                        1
        bmaControls( 0)                     0
        bmaControls( 1)                     0
      VideoStreaming Interface Descriptor:
        bLength                            11
        bDescriptorType                    36
        bDescriptorSubtype                  6 (FORMAT_MJPEG)
        bFormatIndex                        1
        bNumFrameDescriptors                2
        bFlags                              1
          Fixed-size samples: Yes
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x00
          Interlaced stream or variable: No
          Fields per frame: 1 fields
          Field 1 first: No
          Field pattern: Field 1 only
        bCopyProtect                        0
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         1
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1280
        wHeight                           720
        dwMinBitRate                110592000
        dwMaxBitRate                663552000
        dwMaxVideoFrameBufferSize     2764800
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         2
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                 36864000
        dwMaxBitRate                221184000
        dwMaxVideoFrameBufferSize      921600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            14
        bDescriptorType                    36
        bDescriptorSubtype                  3 (STILL_IMAGE_FRAME)
        bEndpointAddress                    0
        bNumImageSizePatterns               2
        wWidth( 0)                       1280
        wHeight( 0)                       720
        wWidth( 1)                        640
        wHeight( 1)                       480
        bNumCompressionPatterns             0
      VideoStreaming Interface Descriptor:
        bLength                             6
        bDescriptorType                    36
        bDescriptorSubtype                 13 (COLORFORMAT)
        bColorPrimaries                     1 (BT.709,sRGB)
        bTransferCharacteristics            1 (BT.709)
        bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
      VideoStreaming Interface Descriptor:
        bLength                            27
        bDescriptorType                    36
        bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
        bFormatIndex                        2
        bNumFrameDescriptors                4
        guidFormat                            {32595559-0000-0010-8000-00aa00389b71}
        bBitsPerPixel                      16
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x00
          Interlaced stream or variable: No
          Fields per frame: 2 fields
          Field 1 first: No
          Field pattern: Field 1 only
        bCopyProtect                        0
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         1
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1280
        wHeight                           720
        dwMinBitRate                 73728000
        dwMaxBitRate                442368000
        dwMaxVideoFrameBufferSize     1843200
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         2
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                 24576000
        dwMaxBitRate                147456000
        dwMaxVideoFrameBufferSize      614400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         3
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            352
        wHeight                           288
        dwMinBitRate                  8110080
        dwMaxBitRate                 48660480
        dwMaxVideoFrameBufferSize      202752
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         4
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                  6144000
        dwMaxBitRate                 36864000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            22
        bDescriptorType                    36
        bDescriptorSubtype                  3 (STILL_IMAGE_FRAME)
        bEndpointAddress                    0
        bNumImageSizePatterns               4
        wWidth( 0)                       1280
        wHeight( 0)                       720
        wWidth( 1)                        640
        wHeight( 1)                       480
        wWidth( 2)                        352
        wHeight( 2)                       288
        wWidth( 3)                        320
        wHeight( 3)                       240
        bNumCompressionPatterns             0
      VideoStreaming Interface Descriptor:
        bLength                             6
        bDescriptorType                    36
        bDescriptorSubtype                 13 (COLORFORMAT)
        bColorPrimaries                     1 (BT.709,sRGB)
        bTransferCharacteristics            1 (BT.709)
        bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              4 PC Camera
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1400  3x 1024 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              4 PC Camera
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0c00  2x 1024 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              4 PC Camera
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       4
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              4 PC Camera
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         2
      bInterfaceCount         2
      bFunctionClass          1 Audio
      bFunctionSubClass       0 
      bFunctionProtocol       0 
      iFunction               5 Magic Sound
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol      0 
      iInterface              5 Magic Sound
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength       0x002b
        bInCollection           1
        baInterfaceNr(0)        3
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Microphone
        bAssocTerminal          0
        bNrChannels             2
        wChannelConfig     0x0003
          Left Front (L)
          Right Front (R)
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 5
        bSourceID               1
        bControlSize            2
        bmaControls(0)     0x0001
          Mute Control
        bmaControls(1)     0x0003
          Mute Control
          Volume Control
        bmaControls(2)     0x0003
          Mute Control
          Volume Control
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               5
        iTerminal               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              5 Magic Sound
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              5 Magic Sound
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           3
        bDelay                  1 frames
        wFormatTag         0x0001 PCM
      AudioStreaming Interface Descriptor:
        bLength                32
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             1
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            8 Discrete
        tSamFreq[ 0]        48000
        tSamFreq[ 1]        44100
        tSamFreq[ 2]        24000
        tSamFreq[ 3]        22050
        tSamFreq[ 4]        16000
        tSamFreq[ 5]        12000
        tSamFreq[ 6]        11025
        tSamFreq[ 7]         8000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes           13
          Transfer Type            Isochronous
          Synch Type               Synchronous
          Usage Type               Data
        wMaxPacketSize     0x0064  1x 100 bytes
        bInterval               4
        bRefresh                0
        bSynchAddress           0
        AudioStreaming Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         1 Milliseconds
          wLockDelay         0x0000
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  bNumConfigurations      1
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0000
  (Bus Powered)

I am trying to write a MIPI CSI-2 camera sensor driver for an embedded Linux image. Of course, there are tons of driver source codes on the Github etc. but I am having a hard time understanding how camera sensor work *in terms of programming.* I think it would be helpful for everyone if someone ***roughly*** explains step by step how a driver works with a camera sensor. I would be very happy if you could clarify topic of setting registers with I2C. I'm talking about an explanation as abstract as a flow-chart. Thank you everybody who interested in.

I have an Intel(R) RealSense(TM) Depth Camera 435. This camera exposes multiple interfaces. I'm only interested in one of the interfaces which produces RGB output.

# ls /dev/video*
/dev/video0  /dev/video1  /dev/video2  /dev/video3  /dev/video4  /dev/video5  /dev/video6

ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="8086", ATTRS{idProduct}=="0b07", ATTR{interface}=="Intel(R) RealSense(TM) Depth Camera 435 with RGB Module Depth", ATTR{authorized}="0"

ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="8086", ATTRS{idProduct}=="0b07", ATTR{index}!="0", ATTR{interface}=="Intel(R) RealSense(TM) Depth Camera 435 with RGB Module RGB", ATTR{authorized}="0"

The first rule works and removes the devices that I'm not interested in. The second rule doesn't work. I assume that

{index}!="0"

doesn't work. What should I use instead? Also how to make one of the devices the default / first (/dev/video0) device? I tried symlinking and it didn't work. Kernel: 6.8.0-51-generic Ubuntu: Ubuntu 24.04.1 LTS Output from

info -a -p $(udevadm info -q path -n /dev/video0)

:

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/pci0000:00/0000:00:08.1/0000:07:00.4/usb4/4-1/4-1:1.3/video4linux/video4':
    KERNEL=="video4"
    SUBSYSTEM=="video4linux"
    DRIVER==""
    ATTR{dev_debug}=="0"
    ATTR{index}=="0"
    ATTR{name}=="Intel(R) RealSense(TM) Depth Ca"
    ATTR{power/async}=="disabled"
    ATTR{power/control}=="auto"
    ATTR{power/runtime_active_kids}=="0"
    ATTR{power/runtime_active_time}=="0"
    ATTR{power/runtime_enabled}=="disabled"
    ATTR{power/runtime_status}=="unsupported"
    ATTR{power/runtime_suspended_time}=="0"
    ATTR{power/runtime_usage}=="0"

  looking at parent device '/devices/pci0000:00/0000:00:08.1/0000:07:00.4/usb4/4-1/4-1:1.3':
    KERNELS=="4-1:1.3"
    SUBSYSTEMS=="usb"
    DRIVERS=="uvcvideo"
    ATTRS{authorized}=="1"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceClass}=="0e"
    ATTRS{bInterfaceNumber}=="03"
    ATTRS{bInterfaceProtocol}=="00"
    ATTRS{bInterfaceSubClass}=="01"
    ATTRS{bNumEndpoints}=="00"
    ATTRS{iad_bFirstInterface}=="03"
    ATTRS{iad_bFunctionClass}=="0e"
    ATTRS{iad_bFunctionProtocol}=="00"
    ATTRS{iad_bFunctionSubClass}=="03"
    ATTRS{iad_bInterfaceCount}=="02"
    ATTRS{interface}=="Intel(R) RealSense(TM) Depth Camera 435 with RGB Module RGB"
    ATTRS{physical_location/dock}=="no"
    ATTRS{physical_location/horizontal_position}=="left"
    ATTRS{physical_location/lid}=="no"
    ATTRS{physical_location/panel}=="unknown"
    ATTRS{physical_location/vertical_position}=="center"
    ATTRS{power/async}=="enabled"
    ATTRS{power/runtime_active_kids}=="0"
    ATTRS{power/runtime_enabled}=="enabled"
    ATTRS{power/runtime_status}=="suspended"
    ATTRS{power/runtime_usage}=="0"
    ATTRS{supports_autosuspend}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:08.1/0000:07:00.4/usb4/4-1':
    KERNELS=="4-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="ef"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="02"
    ATTRS{bMaxPacketSize0}=="9"
    ATTRS{bMaxPower}=="440mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 5"
    ATTRS{bcdDevice}=="50c3"
    ATTRS{bmAttributes}=="c0"
    ATTRS{busnum}=="4"
    ATTRS{configuration}==""
    ATTRS{devnum}=="25"
    ATTRS{devpath}=="1"
    ATTRS{idProduct}=="0b07"
    ATTRS{idVendor}=="8086"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Intel(R) RealSense(TM) Depth Camera 435 "
    ATTRS{maxchild}=="0"
    ATTRS{physical_location/dock}=="no"
    ATTRS{physical_location/horizontal_position}=="left"
    ATTRS{physical_location/lid}=="no"
    ATTRS{physical_location/panel}=="unknown"
    ATTRS{physical_location/vertical_position}=="center"
    ATTRS{power/active_duration}=="2164"
    ATTRS{power/async}=="enabled"
    ATTRS{power/autosuspend}=="2"
    ATTRS{power/autosuspend_delay_ms}=="2000"
    ATTRS{power/connected_duration}=="2164"
    ATTRS{power/control}=="auto"
    ATTRS{power/level}=="auto"
    ATTRS{power/persist}=="1"
    ATTRS{power/runtime_active_kids}=="0"
    ATTRS{power/runtime_active_time}=="2037"
    ATTRS{power/runtime_enabled}=="enabled"
    ATTRS{power/runtime_status}=="active"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{power/runtime_usage}=="0"
    ATTRS{product}=="Intel(R) RealSense(TM) Depth Camera 435 "
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="removable"
    ATTRS{remove}=="(not readable)"
    ATTRS{rx_lanes}=="1"
    ATTRS{serial}=="012523021278"
    ATTRS{speed}=="5000"
    ATTRS{tx_lanes}=="1"
    ATTRS{urbnum}=="147"
    ATTRS{version}==" 3.20"

  looking at parent device '/devices/pci0000:00/0000:00:08.1/0000:07:00.4/usb4':
    KERNELS=="usb4"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="03"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="9"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0608"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="4"
    ATTRS{configuration}==""
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{idProduct}=="0003"
    ATTRS{idVendor}=="1d6b"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{ltm_capable}=="yes"
    ATTRS{manufacturer}=="Linux 6.8.0-51-generic xhci-hcd"
    ATTRS{maxchild}=="2"
    ATTRS{power/active_duration}=="1791955"
    ATTRS{power/async}=="enabled"
    ATTRS{power/autosuspend}=="0"
    ATTRS{power/autosuspend_delay_ms}=="0"
    ATTRS{power/connected_duration}=="11764481"
    ATTRS{power/control}=="auto"
    ATTRS{power/level}=="auto"
    ATTRS{power/runtime_active_kids}=="1"
    ATTRS{power/runtime_active_time}=="1791941"
    ATTRS{power/runtime_enabled}=="enabled"
    ATTRS{power/runtime_status}=="active"
    ATTRS{power/runtime_suspended_time}=="9972540"
    ATTRS{power/runtime_usage}=="0"
    ATTRS{power/wakeup}=="disabled"
    ATTRS{power/wakeup_abort_count}==""
    ATTRS{power/wakeup_active}==""
    ATTRS{power/wakeup_active_count}==""
    ATTRS{power/wakeup_count}==""
    ATTRS{power/wakeup_expire_count}==""
    ATTRS{power/wakeup_last_time_ms}==""
    ATTRS{power/wakeup_max_time_ms}==""
    ATTRS{power/wakeup_total_time_ms}==""
    ATTRS{product}=="xHCI Host Controller"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{remove}=="(not readable)"
    ATTRS{rx_lanes}=="1"
    ATTRS{serial}=="0000:07:00.4"
    ATTRS{speed}=="10000"
    ATTRS{tx_lanes}=="1"
    ATTRS{urbnum}=="1078"
    ATTRS{version}==" 3.10"

  looking at parent device '/devices/pci0000:00/0000:00:08.1/0000:07:00.4':
    KERNELS=="0000:07:00.4"
    SUBSYSTEMS=="pci"
    DRIVERS=="xhci_hcd"
    ATTRS{ari_enabled}=="0"
    ATTRS{broken_parity_status}=="0"
    ATTRS{class}=="0x0c0330"
    ATTRS{consistent_dma_mask_bits}=="64"
    ATTRS{current_link_speed}=="8.0 GT/s PCIe"
    ATTRS{current_link_width}=="16"
    ATTRS{d3cold_allowed}=="1"
    ATTRS{dbc}=="disabled"
    ATTRS{dbc_bInterfaceProtocol}=="01"
    ATTRS{dbc_bcdDevice}=="0010"
    ATTRS{dbc_idProduct}=="0010"
    ATTRS{dbc_idVendor}=="1d6b"
    ATTRS{device}=="0x1639"
    ATTRS{dma_mask_bits}=="64"
    ATTRS{driver_override}=="(null)"
    ATTRS{enable}=="1"
    ATTRS{irq}=="56"
    ATTRS{local_cpulist}=="0-15"
    ATTRS{local_cpus}=="ffff"
    ATTRS{max_link_speed}=="16.0 GT/s PCIe"
    ATTRS{max_link_width}=="16"
    ATTRS{msi_bus}=="1"
    ATTRS{msi_irqs/57}=="msix"
    ATTRS{msi_irqs/58}=="msix"
    ATTRS{msi_irqs/59}=="msix"
    ATTRS{msi_irqs/60}=="msix"
    ATTRS{msi_irqs/61}=="msix"
    ATTRS{msi_irqs/62}=="msix"
    ATTRS{msi_irqs/63}=="msix"
    ATTRS{msi_irqs/64}=="msix"
    ATTRS{numa_node}=="-1"
    ATTRS{power/async}=="enabled"
    ATTRS{power/control}=="on"
    ATTRS{power/runtime_active_kids}=="2"
    ATTRS{power/runtime_active_time}=="11765048"
    ATTRS{power/runtime_enabled}=="forbidden"
    ATTRS{power/runtime_status}=="active"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{power/runtime_usage}=="1"
    ATTRS{power/wakeup}=="enabled"
    ATTRS{power/wakeup_abort_count}=="0"
    ATTRS{power/wakeup_active}=="0"
    ATTRS{power/wakeup_active_count}=="0"
    ATTRS{power/wakeup_count}=="0"
    ATTRS{power/wakeup_expire_count}=="0"
    ATTRS{power/wakeup_last_time_ms}=="0"
    ATTRS{power/wakeup_max_time_ms}=="0"
    ATTRS{power/wakeup_total_time_ms}=="0"
    ATTRS{power_state}=="D0"
    ATTRS{remove}=="(not readable)"
    ATTRS{rescan}=="(not readable)"
    ATTRS{reset}=="(not readable)"
    ATTRS{reset_method}=="pm"
    ATTRS{resource0}=="(not readable)"
    ATTRS{revision}=="0x00"
    ATTRS{subsystem_device}=="0x50ae"
    ATTRS{subsystem_vendor}=="0x17aa"
    ATTRS{vendor}=="0x1022"

  looking at parent device '/devices/pci0000:00/0000:00:08.1':
    KERNELS=="0000:00:08.1"
    SUBSYSTEMS=="pci"
    DRIVERS=="pcieport"
    ATTRS{ari_enabled}=="0"
    ATTRS{broken_parity_status}=="0"
    ATTRS{class}=="0x060400"
    ATTRS{consistent_dma_mask_bits}=="32"
    ATTRS{current_link_speed}=="8.0 GT/s PCIe"
    ATTRS{current_link_width}=="16"
    ATTRS{d3cold_allowed}=="1"
    ATTRS{device}=="0x1635"
    ATTRS{dma_mask_bits}=="32"
    ATTRS{driver_override}=="(null)"
    ATTRS{enable}=="2"
    ATTRS{irq}=="42"
    ATTRS{local_cpulist}=="0-15"
    ATTRS{local_cpus}=="ffff"
    ATTRS{max_link_speed}=="16.0 GT/s PCIe"
    ATTRS{max_link_width}=="16"
    ATTRS{msi_bus}=="1"
    ATTRS{msi_irqs/42}=="msi"
    ATTRS{numa_node}=="-1"
    ATTRS{power/async}=="enabled"
    ATTRS{power/autosuspend_delay_ms}=="100"
    ATTRS{power/control}=="auto"
    ATTRS{power/runtime_active_kids}=="5"
    ATTRS{power/runtime_active_time}=="11765057"
    ATTRS{power/runtime_enabled}=="enabled"
    ATTRS{power/runtime_status}=="active"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{power/runtime_usage}=="0"
    ATTRS{power/wakeup}=="enabled"
    ATTRS{power/wakeup_abort_count}=="0"
    ATTRS{power/wakeup_active}=="0"
    ATTRS{power/wakeup_active_count}=="0"
    ATTRS{power/wakeup_count}=="0"
    ATTRS{power/wakeup_expire_count}=="0"
    ATTRS{power/wakeup_last_time_ms}=="0"
    ATTRS{power/wakeup_max_time_ms}=="0"
    ATTRS{power/wakeup_total_time_ms}=="0"
    ATTRS{power_state}=="D0"
    ATTRS{remove}=="(not readable)"
    ATTRS{rescan}=="(not readable)"
    ATTRS{reset}=="(not readable)"
    ATTRS{reset_method}=="pm"
    ATTRS{revision}=="0x00"
    ATTRS{secondary_bus_number}=="7"
    ATTRS{subordinate_bus_number}=="7"
    ATTRS{subsystem_device}=="0x17aa"
    ATTRS{subsystem_vendor}=="0x50ae"
    ATTRS{vendor}=="0x1022"

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""
    ATTRS{power/async}=="enabled"
    ATTRS{power/control}=="auto"
    ATTRS{power/runtime_active_kids}=="20"
    ATTRS{power/runtime_active_time}=="0"
    ATTRS{power/runtime_enabled}=="disabled"
    ATTRS{power/runtime_status}=="unsupported"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{power/runtime_usage}=="0"
    ATTRS{waiting_for_supplier}=="0"

I have a Raspberry Pi (Debian version: 12 bookworm)with a camera module attached, and I want to use it as a webcam. I'm a beginner with this kind of setup, so I followed the instructions from here: https://www.raspberrypi.com/tutorials/plug-and-play-raspberry-pi-usb-webcam/ . It worked perfectly, but then I wanted to add a filter. So, I tried to create a virtual camera device using v4l2-ctl and intended to use that as the source for the usb-gadget script. I then wrote a Python script that takes input from the real camera, applies the filter, and sets the output as the input for the virtual camera. However, the usb-gadget script doesn't recognize the virtual camera, and now I'm stuck. How can I make this device act like a USB camera when attached to a PC if I use something other than the script from the tutorial?

I am trying to use tw9990 connected to a ATSAMA5D29 to play a camera feed. I have a custom board where the digital data lines are going to the ISC lines of the processor. I have an embedded linux distro made in Buildroot based off the microchip kernel. I am seeing the TW9910 module come up and talk to the TW9990 chip successfully, but I don't see any /dev/video. I added a small patch to the microchip-isc driver's probe() function which printed "probing" with printk, but I'm not seeing it in dmesg. An interesting, but confusing part of dmesg: # dmesg | grep isc device class 'misc': registering /ahb/apb/isc@f0008000 Linked as a fwnode consumer to /ahb/apb/pinctrl@fc038000 /ahb/apb/isc@f0008000 Dropping the fwnode link to /ahb/apb/pinctrl@fc038000/isc_base /ahb/apb/isc@f0008000 Dropping the fwnode link to /ahb/apb/pinctrl@fc038000/isc_data_8bit device: 'platform:fc038000.pinctrl--platform:f0008000.isc': device_add devices_kset: Moving f0008000.isc to end of list PM: Moving platform:f0008000.isc to end of list platform f0008000.isc: Linked as a consumer to fc038000.pinctrl /ahb/apb/isc@f0008000 Dropping the fwnode link to /ahb/apb/pinctrl@fc038000 bus: 'platform': add driver microchip-sama5d2-isc /ahb/apb/i2c@f8028000/tw9990@44: Relaxing link with /ahb/apb/isc@f0008000 /ahb/apb/isc@f0008000: Relaxing link with /ahb/apb/i2c@f8028000/tw9990@44 platform f0008000.isc: Fixed dependency cycle(s) with /ahb/apb/i2c@f8028000/tw9990@44 device: 'i2c:0-0044--platform:f0008000.isc': device_add platform f0008000.isc: Linked as a sync state only consumer to 0-0044 /ahb/apb/isc@f0008000 Dropping the fwnode link to /ahb/apb/i2c@f8028000/tw9990@44 /ahb/apb/i2c@f8028000/tw9990@44: Relaxing link with /ahb/apb/isc@f0008000 i2c 0-0044: Fixed dependency cycle(s) with /ahb/apb/isc@f0008000 device: 'platform:f0008000.isc--i2c:0-0044': device_add i2c 0-0044: Linked as a sync state only consumer to f0008000.isc /ahb/apb/i2c@f8028000/tw9990@44 Dropping the fwnode link to /ahb/apb/isc@f0008000 at91_i2c f8028000.i2c: Dropping the link to f0008000.isc device: 'platform:f0008000.isc--platform:f8028000.i2c': device_unregister tw9910 0-0044: Dropping the link to f0008000.isc device: 'platform:f0008000.isc--i2c:0-0044': device_unregister The device_register and between isc and i2c may be part of the problem, but I don't know why that's happening. The full dmesg is here and the kernel configuration is here .

It is a lenovo ideapad dual boot system with Ubuntu and Kali. Webcam is not accessible, it is showing blank, the light blips and goes off. Tried it with Cheese, browsers, guvcview, zoom and teams. It shows 'integrated camera c' in the settings but output remains blank. Few things which I've tried and their output `uvcvideo 1-6:1.1: Failed to resubmit video URB (-19) dmesg | grep video [ 41.778881] videodev: Linux video capture interface: v2.00 [ 42.298170] ACPI: video: Video Device [GFX0] (multi-head: yes rom: no post: no) [ 42.534287] usbcore: registered new interface driver uvcvideo [ 952.321442] uvcvideo 1-6:1.1: Failed to resubmit video URB (-19). [ 952.325434] uvcvideo 1-6:1.1: Failed to resubmit video URB (-19). [ 952.329433] uvcvideo 1-6:1.1: Failed to resubmit video URB (-19). [ 952.333433] uvcvideo 1-6:1.1: Failed to resubmit video URB (-19). also while trying to use Cheese (cheese:9675): dconf-WARNING **: 03:47:50.976: failed to commit changes to dconf: Failed to execute child process “dbus-launch” (No such file or directory) (cheese:9675): cheese-WARNING **: 03:47:51.275: Could not read from resource.: ../sys/v4l2/gstv4l2bufferpool.c(1181): gst_v4l2_buffer_pool_poll (): /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/GstBin:bin18/GstV4l2Src:v4l2src1: poll error 1: Invalid argument (22)` Also tried chmod 666 /dev/video* but problem remained unsolved.

I don't know if this is the right place (in case it's not, please redirect me to more appropriate site), but trying - the integrated camera on ACER SP514-51N is not working in GNU/Linux. On the same machine, when MS Windows is booted, works just fine. According to ACER forum (link below), it is a CHICONY model "CJFKF28" **How to make the camera working?** Here is some debug info from GNU/Linux (latest stable POP_OS, currently on kernel 6.9.3-76060903-generic #202405300957~1726766035~22.04~4092a0e):

spin5 :: ~ » sudo lsmod | grep -iE "video|cam"
videobuf2_vmalloc      20480  0
videobuf2_memops       16384  1 videobuf2_vmalloc
videobuf2_v4l2         36864  0
videobuf2_common       81920  3 videobuf2_vmalloc,videobuf2_v4l2,videobuf2_memops
videodev              356352  4 v4l2_async,v4l2_fwnode,videobuf2_v4l2,ov2740
mc                     81920  5 v4l2_async,videodev,videobuf2_v4l2,videobuf2_common,ov2740
video                  73728  3 acer_wmi,xe,i915
wmi                    28672  3 video,acer_wmi,wmi_bmof
spin5 :: ~ » sudo dmesg | grep -iE "video|cam"
[    0.000000]   AMD AuthenticAMD
[    0.100395] PCI: ECAM [mem 0xc0000000-0xcfffffff] (base 0xc0000000) for domain 0000 [bus 00-ff]
[    0.100395] PCI: not using ECAM ([mem 0xc0000000-0xcfffffff] not reserved)
[    0.224013] PCI: ECAM [mem 0xc0000000-0xcfffffff] (base 0xc0000000) for domain 0000 [bus 00-ff]
[    0.226296] PCI: ECAM [mem 0xc0000000-0xcfffffff] reserved as ACPI motherboard resource
[    0.495588] pci 0000:00:02.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[    7.005562] ACPI: video: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
[    7.006168] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input18
[    8.942344] videodev: Linux video capture interface: v2.00
[ 1755.195885] usbcore: registered new interface driver uvcvideo
[ 2471.824739] usbcore: deregistering interface driver uvcvideo
spin5 :: ~ » sudo lsusb                       
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 04f3:0c7f Elan Microelectronics Corp. ELAN:Fingerprint
Bus 003 Device 004: ID 8087:0033 Intel Corp. 
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
spin5 :: ~ »

Here is some selected info from MS windows device list:

Intel(R) ADL AVStream Camera
DISPLAY\INT3480\4&2DED5861&0&UID144512
VIDEO\VEN_8086&DEV_46A6&SUBSYS_16131025&REV_0C&INT3480
VIDEO\VEN_8086&DEV_46A6&SUBSYS_16131025&INT3480
VIDEO\VEN_8086&DEV_46A6&INT3480
VIDEO\INT3480
000000E0
CM_DEVCAP_SILENTINSTALL
CM_DEVCAP_RAWDEVICEOK
CM_DEVCAP_SURPRISEREMOVALOK
oem80.inf
ks.inf
KSCAPTUR.inf
machine.inf
ACPI(_SB_)#ACPI(PC00)#ACPI(GFX0)#ACPI(IPUA)
oem81.inf:VIDEO\INT3480,iacamera64.NT,12/30/2021,63.22000.3.6744
PCI\VEN_8086&DEV_46A6&SUBSYS_16131025&REV_0C\3&11583659&0&10
\Device\000000a4
\_SB.PC00.GFX0.IPUA
Intel(R) ADL AVStream Camera
ISP Camera Device
ACER FHD User Facing

Thanks a lot! Related: https://community.acer.com/en/discussion/comment/1302958#Comment_1302958 Duplicate here: https://superuser.com/questions/1858660/how-to-enable-the-internal-camera-on-acer-spin-sp514-51n-laptop-in-gnu-linux (I am figuring out which forum is more suitable for this question and solution)

I have a camera that creates RTSP traffic. I connected it to a Linux PC via Ethernet, configured the network and access. But when I tried to apply QoS rules, the tc statistics showed that too few bytes were sent. After some research, I found that HTTP, SSH and RTSP (connection) traffic from the camera was displayed correctly in the statistics. However, tc seems to work differently with RTP traffic. Video in VLC was playing, nft and tcpdump showed traffic. I tried using Debian 12, Ubuntu 24.04, Manjaro - it still didn't work. Imitating RTP with FFMPEG also did not bring success. This seems really weird and I didn't know what could cause the problem or what else to try.

I'm running Kali Linux (deb) on VMWare Workstation 17 Pro. I have my host laptop's (Win10) webcam hooked up to Kali via VMware. On the Kali guest, when I give it a ls /dev/video* I get video0 through video3 as results, meaning the Kali guest knows there is a camera hooked up. I am testing the camera with cheese to see what it sees, and here is where the issue is. The app/camera does start, but it's mostly a grey box. The top of the image renders a few lines so I can see my ceiling fan, but 95% of the rest of the bottom of the image is grey. The image also flickers here and there, some times showing more of my ceiling. I have the Accelerate 3D Graphics option turned on in VMWare (although I didn't do anything on Kali side, maybe I'm missing something here?). Any idea how to get this built-in laptop webcam to work properly on the Kali guest OS in VMware?