Someone suggested I direct a copy of the unmodified X display to a file and afterwards convert that file to a general purpose video file. What commands would I use to do this on a Kubuntu system? (Edit: He said something about attaching a display port to a file.) If not possible, what is my best option for an excellent quality screen recording that does not depend on fast hardware? *Background:* I tried using avconv with -f x11grab and some GUI programs. However, no matter what I try, the resulting video either has artifacts/ blurriness or is choppy (missing frames). This is probably due to CPU/ memory constraints. *Goals:* - Video quality must not be noticeably different from seeing the session directly on a screen, because the purpose is to demonstrate an animated application. - The final video must be in a common format that can be sent to Windows users and used on the web. I think H.264 MP4 should work. - The solution should not presume much prior knowledge. I am familiar with the command line and basic Linux commands, but I am still learning Linux and do not know much about video codecs. *What I already tried:* - Best command so far: ffmpeg -f x11grab -s xga -r 30 -i :0.0 -qscale 0.1 -vcodec huffyuv grab.avi, then convert to mp4 with ffmpeg -i grab.avi -sameq -vcodec mpeg4 grab.mp4. - The picture quality is great, but on my test sytem it lags the computer. On a faster target system it does not lag, but frames are obviously skipped, making the video not very *smooth*. - I am still trying to figure out how to save the grab.avi file to SHM to see if that helps. - Using Istanbul and RecordMyDesktop GUI recorders - Simple command: avconv -f x11grab -s xga -r 25 -i :0.0 simple.mpg using avconv version 0.8.3-4:0.8.3-0ubuntu0.12.04.1 - Adding -codec:copy (fails with: Requested output format 'x11grab' is not a suitable output format) - Adding -same_quant (results in great quality, but is very choppy/ missing many frames) - Adding -vpre lossless_ultrafast (fails with: Unrecognized option 'vpre', Failed to set value 'lossless_ultrafast' for option 'vpre') - Adding various values of -qscale - Adding various values of -b - Adding -vcodec h264 (outputs repeatedly: Error while decoding stream #0:0, [h264 @ 0x8300980] no frame!) - Note: h264 is listed in avconv -formats output as DE h264 raw H.264 video format

Why do I get this in the console when restarting plasmashell with killall plasmashell and kstart5 plasmashell in Debian11/KDE with Wayland and how to solve the problem? Of PipeWire I currently only have libpipewire-0.3-0 installed, I searched for screencast in Apper but don't have anything of that installed. I'm using PulseAudio and I think I also got this error when I ran something else than plasmashell but it's probably the same cause. I'm not screenrecording but have some apps that can do so. I tried uninstalling xdg-desktop-portal and this reduced these errors but the error still shows, it went from 8 times the above error to only one:

error creating screencast "Failed to connect PipeWire context"
trying to show an empty dialog
DataControlOffer: timeout reading from pipe
DataControlOffer: timeout reading from pipe
DataControlOffer: timeout reading from pipe
DataControlOffer: timeout reading from pipe

**Edit**: it's two errors now and unlike before these only occur after waiting for approximately 20 second after starting plasmashell (the other errors are because of kdeconnect trying to start without being configured to so which I blocked and asked about separately):

...
error activating kdeconnectd: QDBusError("org.freedesktop.DBus.Error.Spawn.ExecFailed", "Failed to execute program org.kde.kdeconnect: Permission denied")
kdeconnect.interfaces: dbus interface not valid
kdeconnect.interfaces: dbus interface not valid
error creating screencast "Failed to connect PipeWire context"
error creating screencast "Failed to connect PipeWire context"
libpng warning: iCCP: known incorrect sRGB profile

**Edit 2**: this error does not occur on another machine with nearly the same setup. Plasmashell is version 5.20.5 in Debian11. The same error occurs again when waiting for a while. How can I find out the source or traceback of this error message (may be a separate question)? I'd like to find out what software causes it, it's probably something that plasmashell launches. **Edit 3**: after upgrading to **Debian12** and resuming from sleep these lines show in journalctl shortly after resuming. Why and what should I do:

systemd: NetworkManager-dispatcher.service: Deactivated successfully.
kwin_wayland_wrapper: kwin_screencast: Failed to connect PipeWire context
kwin_wayland_wrapper: kwin_screencast: Failed to connect PipeWire context
plasmashell: error creating screencast "Failed to connect PipeWire context"
...

Is there some problem with kwin_wayland or a pipewire package missing? It seems like many people get these messages so some further information would be useful.

I tried using the Chrome extension Flonnect , but while it worked for a small test capture of a few seconds, the extension crashed when I tried to capture a few hours in full-screen mode. I want to capture in full-screen mode because I'm not interested in capturing anything other than the video stream itself. I then tried Screen Recorder for Google Chrome , but while this does seem to work, the saved video file is screwed up in some way - mpv isn't able to determine how long it is, so it keeps thinking that it's nearly at the end of the video. Even the extension itself has this problem when it's playing back the videos!

I have been trying to find a way to connect my Pop!_OS to my TV using Miracast for quite some time. Tried to set up Miracast for straight 2 days but was unable to get it to work. I'm kind of frustrated now. Is there any other way that I can connect my laptop to my TV using Miracast? Laptop Serial Number: 4HNQP72

~$ iwlist frequency

lo        no frequency information.

wlp6s0    32 channels in total; available frequencies :
          Channel 01 : 2.412 GHz
          Channel 02 : 2.417 GHz
          Channel 03 : 2.422 GHz
          Channel 04 : 2.427 GHz
          Channel 05 : 2.432 GHz
          Channel 06 : 2.437 GHz
          Channel 07 : 2.442 GHz
          Channel 08 : 2.447 GHz
          Channel 09 : 2.452 GHz
          Channel 10 : 2.457 GHz
          Channel 11 : 2.462 GHz
          Channel 12 : 2.467 GHz
          Channel 13 : 2.472 GHz
          Channel 36 : 5.18 GHz
          Channel 40 : 5.2 GHz
          Channel 44 : 5.22 GHz
          Channel 48 : 5.24 GHz
          Channel 52 : 5.26 GHz
          Channel 56 : 5.28 GHz
          Channel 60 : 5.3 GHz
          Channel 64 : 5.32 GHz
          Channel 100 : 5.5 GHz
          Channel 104 : 5.52 GHz
          Channel 108 : 5.54 GHz
          Channel 112 : 5.56 GHz
          Channel 116 : 5.58 GHz
          Channel 120 : 5.6 GHz
          Channel 124 : 5.62 GHz
          Channel 128 : 5.64 GHz
          Channel 132 : 5.66 GHz
          Channel 136 : 5.68 GHz
          Channel 140 : 5.7 GHz
          Current Frequency:2.412 GHz (Channel 1)

enp7s0    no frequency information.

I'm interested in trying to record my screen so I can do walkthroughs of games and such. Usually these are action games, so high resolution and fps are both important. I'm using kazam to try and record my screen at 1920x1080x60 fps. However, the video result lags quite a bit. I would estimate the result is maybe 5-10 fps. I did a test by recording desktop to ensure the issue was the recording, not the game. I had 2 gigs of memory free and the load never went above 3.0. iostat showed iowait at 0.39%. The resulting test clips are usually 10 megs or so, and I'm fairly certain that Kazam compresses on the fly and stores the videos in memory until it asks you to save them to disk, so I would imagine io shouldn't be an issue. So if the limiting factor isn't cpu, memory, or disk io, what's going on here? Thanks!

For making documentation/tutorial videos, I need to highlight the mouse, for example with a yellow translucent corona around it: The marker should be active when clicking and moving, but if it's on all the time, that's just as fine. It can obscure the view on what is behind it to some degree but it may not disable being able to click what is behind it or take focus away from windows. Compiz seems like a thing of the past, find-cursor isn't tied to any actions (clicks/movements) and blocks interaction (while it's drawing, you can't click "through" it) and key-mon doesn't draw correctly, disables interaction as well and is generally buggy when it comes to the mouse highlighter, at least with a tiling window manager. I'm using Arch Linux and awesome wm. Thanks!

I have Windows 10 installed on one of my laptops. I also have a Linux (Debian Bullseye) device connected to a big display through HDMI. My laptop and my Linux device are connected to my router through Wi-Fi and LAN, respectively. I want to mirror (duplicate, not extend) my Windows screen wirelessly to my Linux device so I can view it on a bigger screen. Windows 10 already has wireless screencasting support, and I don't want to install anything extra in it. But I am free to install/run stuff on the Debian running on the Linux device. The built-in screencast software of W10 should be able to find, connect, and stream display to the Linux device over Wi-Fi. How can I achieve this? I tried running [Miraclecast](https://github.com/albfan/miraclecast) on the Linux device, but it requires me to stop the network manager, which isn't acceptable as I need an internet connection on the Linux device.

When I use the built-in Screencast feature on my Android phone (Oppo Reno 4), I am able to cast a YouTube video from phone to my TV ([LG] webOS TV LM630BPTB), and then after I swipe down and tap Screencast options and choose *Cast "YouTube" only*, I am able to even use my phone at the same time while it is casting to the TV. Perfect. So now the video and the audio are all forwarded to the TV. The thing is, theoretically I should also be able to view a simple MP4 file on the phone simultaneously and also hear audio locally on the phone if some advanced programming techniques had been employed with suitable hardware. But unfortunately, when I try viewing an MP4 file on my phone or scroll down on FB and suddenly encounter a video in my feeds, the screencast gets interrupted. Is there a solution to this problem? What is the solution? It seems like there is no simple solution to this problem within the Android operating system itself. The screencasting feature probably is not designed to handle multiple video streams at once, and the limitation is more of a hardware and software design constraint. Anything I can do about this? Maybe install a certain app?

I'm trying to copy a gif into my clipboard such that I would be able to paste it into web applications (slack, github, etc.). I have tried the following without any luck: xclip -selection clipboard -t image/gif < /path/to/image.gif

I'm trying to record a screencast using ffmpeg but my mouse pointer is invisible. What am I doing wrong? This is the command: ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s 1024x768 -i :0.0 -acodec pcm_s16le \ -vcodec libx264 -preset ultrafast -crf 0 -threads 0 output.mkv

## I'm trying to capture an audio video feed (screen-cast) from my web browser and all screen-casting options I tried have the same issue: # No sound is captured ----------- ### Platform I'm using a near default install of Linx Mint KDE x64 Petra. The FLAC package is installed Outputs of cat /proc/asound/pcm 00-00: ALC270 Analog : ALC270 Analog : playback 1 : capture 1 00-03: HDMI 0 : HDMI 0 : playback 1 ------------- ### My current process is - open vlc and press Ctrl-C - change Capture mode to Desktop - Change Desired fame rate to something reasonable (24 f/s) - Check Show more optoions - Change Caching to 0 - check Play another media synchronously ## I think the problem is in this next step: - In the Extra media field I've tried entering alsa://plughw or alsa://hw:0,0 as specified here . - I've also tried browsing for my audio device: - I clicked Capture Device tab - Next to Capture mode I selected Video for Linux 2 - Next to Audio device name I chose hw;0,0 - I then pressed select **However, when I'm retured to the Open Media window, the text next to Extra media is filled in with v4l2:// with no references to the audio device.** Following this, I click the drop down next to play and choose convert and set the profile to Video - Theora + Flac (OGG) and set my destination file to .ogg and hit start and launch the webpage I want to record. The video comes out fine, but there is no audio. **Note:** As VLC's user-base is likely much larger than any other option I've tried, I've decided to restrict my focus to solving this issue for VLC but am not opposed to other solutions aside from the obvious bridging of the headphone and mic jacks via an 3.5mm audio cable.

I'm in the process of building a 2nd-screen solution for my workspace; something that provides ubiquitous connectivity, so that I can simply toggle any of my machines/mobiles/laptops/etc to use the screen on my desk as an additional monitor without needing to muck around with cables. In W10+, there's an option to "cast/project to networked display", that uses the WiDi protocol, a variant of the Wi-Fi Direct standard. Of course there's also the Chromecast protocol that seems fairly well integrated into modern-day browsers, though I'm not super familiar what a native protocol Linux/Unix/POSIX would use (mkchromecast is probably my best bet here). For now I'm using an old RPi3b+ running stock *Bullseye* & *XFCE* driving little more than a terminal (to remote into headless hosts), *Midori* (lightweight browsing, but hardly use it due to the load it introduces) & *barrier* so that I only need to contend with a single set of input devices. So far, so good. Where I'm getting stuck on is using this (essentially thin client) as a rendering sink, i.e. being able to cast Video & Audio (AV) ***TO*** this device, rather than from it. Now I know that this device hardware might simply not be capable of doing this (simple) rendering, so I have a NUC sitting spare for this purpose, i.e. once I've figured out the stack on the RPi, I can rebuild/redeploy it to this other box. There really does not seem to be much for something that seems to common-place on the W32 ecosystem. What I've found so far: - AirServer seems the simplest (best?) solution, but does not have a POSIX agent/renderer AFAICT - MiracleCast & LazyCast seem like promising solutions, but don't seem to work particularly well, even on other non-RPi machines I've tried. - GNOME Network Displays is close or essentially what I'm looking for, but lacks any meaningful documentation I can find Across the board they all seem to rely on WiFi-Direct support on the sink, but that too is coming up lacking in the RTFM-department . This protocol/stack seems somewhat ubiquitous, especially for embedded devices, but a total PITA on POSIX. The closest I've come to touch this end of the stack is around wpa_supplicant (& its associated wpa_cli & wpa_gui lower-level toolstools), but these are not yielding the results I'm looking for (such as the P2P config - PIBKAC) I do have a few spare Android mobiles I would flash, but this will introduce a whole host of additional complexities I'd rather like to avoid & I'm not sure this'll improve the situation. I'd appreciate any help that could be provided, as I'd like finish this off this build & put on the final touches.

I had tried to start screencast by the shortcut Ctrl+Alt+Shift+R. Although it didn't start. Why this is happening? It was working fine when I was using Mint, Ubuntu, Fedora.

I am trying to record the sound output, but this looks more complicated than expected. I expected that arecord -f cd -t wav --max-file-time 3600 --use-strftime %Y/%m/%d/listen-%H-%M-%v.wav would record 1 file every hour, putting the resulting file in a directory structure with year, month, day and name (hour).wav file. It actually records the sound output through the microphone (adding to it every imaginable environment noise, specially typing in the keyboard). ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 -f alsa -ac 2 -i pulse -acodec libmp3lame -ab 128k /tmp/outputFile.mpg manages to record the video and sound, but suffers from the same problem as the previous command. Is there a way of pipping to a file the sound that's being generated? The output of record -l is: > **** List of CAPTURE Hardware Devices **** card 0: MID [HDA Intel MID], device 0: ALC269VB Analog [ALC269VB Analog] Subdevices: 1/1 > Subdevice #0: subdevice #0 If I don't find a solution, I'd go with the inelegant solution of buying a loopback cable to connect the output of the loudspeakers to the input of the microphone.

I've figured out how to record decent quality with avconv now, the problem that remains which I also have experienced with ffmpeg and recordmydesktop is that my desktop background keeps flickering through. I've disabled the desktop effects in Linux Mint 16 Petra, running Cinnamon. This is how it looks: How can I avoid this? Should I use another Desktop Environment like XFCE? The command I am using: $ avconv -f alsa -ac 2 -i plughw:2,0 -f x11grab -s 1920x1080 \ -r 30 -i :0.0 -acodec libvorbis -ar 44100 -vcodec huffyuv grab.avi

Is it possible to make a screencast (for example of a streaming video) on a nonactive workspace? I usually use simplescreenrecorder for screencasts and xmonad as window manager, but the solution might involve other software. Maybe it is possible to make the graphics card send signals to an imaginary second screen and capture the signals there?

I have a full-screen Qt app running on a Raspberry Pi 3 using the "eglfs" platform. It draws using KMS/DRM and the /dev/dri/core0 GPU device. The GPU is a Broadcom VideoCore IV. I'd like to record the screen and have not been successful. The closest I've got is: 1. Using ffmpeg and the kmsgrab input device. Unfortunately ffmpeg -f kmsgrab -i - -vf 'hwdownload,format=bgr0' output.mp4 produces garbled video, as shown below. 2. Redirect Qt to the framebuffer. For example: ./my_app -platform linuxfb:fb=/dev/fb0. Then the more straight-forward ffmpeg -f fbdev -i /dev/fb0 output.mp4 works. Unfortunately linuxfb does not render features from Qt5Compat.GraphicalEffects such as layer.effect, so my buttons do not show. Given the garbled output from ffmpeg seems so close, I've tried passing various format_modifier's from [drm_fourcc.h](https://elixir.bootlin.com/linux/latest/source/include/uapi/drm/drm_fourcc.h#L380) but have not seen any difference. Surely there's a set of hwmap or format_modifier flags that will ensure the output resembles what appears on screen? For reference I'm using kernel version 5.4.83-v8 and dtoverlay=vc4-fkms-v3d. I could adjust those things if I thought it would make any difference.

I happen to record a meeting using SimpleScreenRecorder (SSR) on Linux. I use Pulseaudio and default configurations. When SSR records the screen and audio, it records the speakers output, but not my microphone. I know that I can create a loopback using pactl load-module module-loopback latency_msec=1 so that the mic goes to the speakers and SSR can record both, but that creates feedback and Larsen effect when not using earphones. Apparently I cannot ask SSR to record from two audio sources at once. Is there a way to create a virtual Pulseaudio source where the speakers and mic both go, so that I can then instruct SSR to record from that virtual source? As I read up at https://unix.stackexchange.com/questions/637045/mix-application-and-microphone-into-one-input , I can create a virtual speaker to which I can route both the mic and the speakers, and from which SSR can read. However, I still want the mic and speaker to function normally while I have the meeting, and i am not sure that solution would do that, so I need someone with Pulseaudio experience here. If I find no simple way, I'll switch from SSR to OBS...

We need to make some videos about working with LaTex documents. We have the typescript and timing -files and now we need to convert them into videos to display them in answers. Basically, the way to do that is to make small Gif -animations. Basically if I could record some area in the X window to GIF, then it would be possible over X to make such videos but it is a bit hxckish way and slow. So how can I convert script -processing into Gif -animations? $ script -t 2> timing # pastie.org etc to show your working ...WORKING... $ scriptreplay timing #how to make them into videos on this site? **Example videos** The source is [here](https://stackoverflow.com/a/1218429/164148) but created with pay-ware W tool. **Perhaps related** 1. https://unix.stackexchange.com/questions/27351/convert-a-typescript-file-to-a-list-of-commands-history 2. Screencasting in Windows [here](http://www.codinghorror.com/blog/2006/11/screencasting-for-windows.html) , what about in *ix?

Are there any alternatives to Loom or some other tool, which is able to record my screen with/without webcam as well and share the recording URL after the recording? Loom does that, but on Linux, there is no installation possible, only usable through the Chrome plugin which does not allow recording video at a high resolution. I am not looking for the screen recording only, but a way to instantly share the recording with my coworkers without any additional actions like uploading, etc.