is it possible to convert mp4 and m4v to webm via command line?
I'd like to just in a bulk swoop convert my mp4 and m4v files to web so i can play them in firefox without any issues.
Here is the command for variable bit-rate conversion for .mp4 -> .webm:
You can then use the command in a bash script to batch covert your files. Here is an example of how you could do that:
Keep in mind that depending on your computer, this may take a very long time.
And of course, this can be done for the m4v files as well. I won't guarantee everything will work since I don't have ffmpeg installed on this machine to test it, so you may need to modify the script and/or the conversion settings to suit your needs.
Documentation for the webm encoder can be found here: http://trac.ffmpeg.org/wiki/vpxEncodingGuide