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
WebM is an open, royalty-free, media file format designed for the web. WebM defines the file container structure, video and audio formats. WebM files consist of video streams compressed with the VP8 or VP9 video codecs and audio streams compressed with the Vorbis or Opus audio codecs.
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
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