I want to convert a whole folder of mp4 files to mp3. But I have no idea how to do that? But I want to keep the thumbnail. Can anyone help me?
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1Sure! Please click on edit and post the code you've tried so far which did not work. Please use edit and not Add Comment.– K7AAYJul 24, 2019 at 23:26
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This breaks down into setting up a loop (for Linux:) shellscript.sh/loops.html which, for each MP4 file, will A) extract the thumbnail superuser.com/questions/538112/… B) extract the audio into an MP3 mutsinzi.com/alternative-to-pacpl-mp4-to-mp3-converter and C) add the thumbnail into the MP3.stackoverflow.com/questions/18710992/…– K7AAYJul 24, 2019 at 23:53
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What is your OS?– lloganJul 25, 2019 at 18:02
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1 Answer
You don't need to do this in three steps:
ffmpeg -vn -sn -dn -i input.mp4 -codec:a libmp3lame -qscale:a 4 output.mp3
This creates a MP3 file with a VBR (variable bit rate) of 165. Check here for more options.
Arguments (beware, the order matters!):
-vndisables all video-streams from the input-sndisables all subtitle-streams from the input-dndisables all data-streams from the input-ispecifies the input file-codec:a libmp3lamespecifies the encoder-qscale:a 4specifies the quality target for libmp3lame- The last argument is the output-file. Note that the file-extension might be used to infer additional information.
