[FFmpeg-user] Subtitles disappear

Reino Wijnsma rwijnsma at xs4all.nl
Wed Jan 6 01:50:11 EET 2021

On 2021-01-05T12:18:34+0100, Cecil Westerhof via ffmpeg-user <ffmpeg-user at ffmpeg.org> wrote:
> I tried it. But at the moment the files generated are about 20% bigger.
libmp3lame's -q:a 9 compared to what?

By default without any additional options...

ffmpeg -i input.wav [-c:a libmp3lame] output.mp3
ffmpeg -i input.wav [-c:a aac] output.m4a

...ffmpeg uses 128kbit/s for both outputs.
See https://trac.ffmpeg.org/wiki/Encode/AAC#NativeFFmpegAACEncoder on how to change the bitrate.


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