Filter crf without bitrate

[martin-coded]

Hello

I have a little problem. I can add the '-crf' filter without any problem, but it doesn't have any effect on the quality and size of the videos. I think I must also remove the '-b:v' '100k' bitrate filter which is automaticly added when I save the file in the x264 format. I think when I can remove the bitrate filter the crf filter will work as expected.

At the moment is the output is following and I want to remove the '-b:v' '100k' completly. How is this possible`?

'/usr/bin/ffmpeg' '-y' '-i' 'bla.mp4' '-preset' 'slow' '-crf' '28' '-threads' '12' '-vcodec' 'libx264' '-acodec' 'libfaac' '-b:v' '100k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '128k' '-vf' '[in]scale=1440:-1[out]' '-pass' '1' '-passlogfile' '/tmp/ffmpeg-passes59a47fa95d453sukeb/pass-59a47fa95da34' '/tmp/laravel-ffmpegVA4Ye7.mp

https://trac.ffmpeg.org/wiki/Encode/H.264

$ffmpeg = FFMpeg::open($save_path.$filename) ->addFilter(['-vf', 'scale=1440:-1', '-preset', 'slow', '-crf', 28]) ->export() ->toDisk('supercdn') ->inFormat((new \FFMpeg\Format\Video\X264)->setKiloBitrate(100)) ->save("/test/.$filename);

Thanks a lot for your help!

[pascalbaljet]

The underlying package adds the bitrate command when your format is an instance of VideoInterface. I think you should try to create a custom format that implements the FormatInterface instead, that way you can supply your own set of filters.