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A comment on I hacked SONOS and YouTube the same day. Parent comment

Re:I hacked SONOS and YouTube the same day by mbilker on Thursday February 03, 2022 @08:11PM (#30201513)
ffmpeg can copy streams without transcoding. For example: ffmpeg -i input.m4a -c:a copy input.mp4
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Re:I hacked SONOS and YouTube the same day by deadf00d on Thursday February 03, 2022 @08:20PM (#30201576)
In this case both mp4 and m4a (which are the same thing) use AAC. So no transcoding, but mp3 is not. So in the case of mp4 > mp3 it need a complete re-encoding of the audio.
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