ffmpeg-compress

ffmpeg -i data/video.mp4 -vcodec h264 -b:v 1000k -acodec mp2 data/output.mp4

anyway i can preserve my subtitles while transcoding and compressing from mkv to mp4? map doesnt seem to work.

Thanks, It works for me
from 137,6MB tobe 61,5MB

Thanks. it still work good.
hint:- if it increase the size of converted video, then try to reduce the bitrate (-b:v 1000k to 500k) for ex.

ffmpeg -i input.mp4 -vcodec h264 -b:v 1000k -acodec mp3 output.mp4

                                to

ffmpeg -i input.mp4 -vcodec h264 -b:v 500k -acodec mp3 output.mp4

It is not working for me sir...
showing me unknown encoder 'h264' and same for 'libx264'
I even tried other commands like:
'-i ${_storedVideoOne.path} -vcodec h264 -acodec aac $outputPath';

'-i ${_storedVideoOne.path} -vcodec libx264 -crf 28 $outputPath';

using with flutter_ffmpeg plugin

I tried mp2 and mp3, all no audio on ios13.6, windows and android ok.

ffmpeg -i input.mp4 -vcodec h264 -b:v 1000k -acodec mp2 output.mp4
ffmpeg -i input.mp4 -vcodec h264 -b:v 1000k -acodec mp3 output.mp4

Finally I use with no -acodec, all ok, and file size no big different.

ffmpeg -i input.mp4 -vcodec h264 -b:v 1000k output.mp4