use nal-hrd option: -x264opts nal-hrd=cbr:force-cfr=1 ( -b:v 25M -minrate 25M maxrate 25M -bufsize 25M )
*hrd=cbr* Regards. On Thu, Aug 10, 2017 at 3:28 PM, jmkhoo1 <[email protected]> wrote: > If you mean a constant frame rate, use -r:v 25. If you actually mean > bitrate, use -b:v and -b:a. I think you might want to look at the x264 > switches to make sure that it is encoded and a constant bit rate, though I > am fairly sure specifying a bit rate will do it.-------- Original message > --------From: akash kulkarni <[email protected]> Date: 8/10/2017 > 7:18 AM (GMT-05:00) To: FFmpeg user questions <[email protected]> > Subject: [FFmpeg-user] CBR and bitrate > hello everyone > > i have file with CBR and when i am converting it to other format by using > following command i am getting VBR both video and audio > > ffmpeg -i input.mp4 -y -r 25 -c:v libx264 -look_ahead 0 -preset veryfast > -b:v 25M -c:a aac ouput.MTS > > so How i can get the output file in CBR mode and frame rate 25. > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
