How do I convert a batch of avis into mp4s?

I have several avi files in the one directory that I would like to convert to mp4s using avconv. Now I know the basic procedure of how to do this, manually, for each avi, namely (where $@ are the variables that change with each new avi): avconv -i $@.avi -c copy $@.mp4 but I was wondering if anyone knows of how to write a bash script to do this automatically. I have tried a modified version of the answer provided to my [optimizing PNG question](https://unix.stackexchange.com/questions/223156/how-do-i-write-a-script-to-automatically-optimize-all-the-pngs-in-my-mediawiki-i) namely: for k in find . -name "*.avi" do avconv -i "$k" -c copy "$k.mp4" done but as k is of the form ./filename avconv could not understand it when given as input. Another issue is that even though I used quotation marks, because many of my avis have spaces in their file names, for some reason avconv was being run for every space-separated word in the file's name.