Can I use ffmpeg or another command-line tool (I recently downloaded mkvtoolnix for example) to directly extract audio into m4a files from webm videos?
I've previously been doing this 2-step process:
ffmpeg -i input.webm temp.mp4
ffmpeg -i temp. mp4 -vn -c:a copy audio.m4a
Problems are that the first command is so slow, seemingly needlessly slow as the second command completes consistently in less than a second. Also, it's a pain to have to alternate between the two different commands.
Is there a single command I can use to put the audio of a webm video in a .m4a audio file?
I am also looking for a solution for .mkv files
FFmpeg only writes AAC / ALAC / AC3 codec audio to M4A, normally not featured in WebM containers, so you will have to use
ffmpeg -i input.webm -vn audio.m4a