I have had the same problem with both CBR and constrained VBR, even with two passes, and no luck in really controlling the bitrate as specified. I posted it a couple of weeks ago but did not get anyone who could really get CBR and or 110% or 150% or any other constrained VBR or at least exactly how to reproduce any results.
> On Aug 10, 2017, at 10:35 PM, akash kulkarni <kul.akash...@gmail.com> wrote: > > its fine @jmkhoo1 atleast you tried and its appreciated... > input file is of constant bit rate mode after executing command i am > getting variable bit rate... > so question was how i get the CBR mode output > > On Thu, Aug 10, 2017 at 7:59 PM, jmkhoo1 <jmkhoo1-at-yahoo....@ffmpeg.org> > wrote: > >> Apologies. I should have tried it out first. You are correct. Even >> specifying r:v and -b:v failed.-------- Original message --------From: >> jmkhoo1 <jmkhoo1-at-yahoo....@ffmpeg.org> Date: 8/10/2017 9:28 AM >> (GMT-05:00) To: FFmpeg user questions <ffmpeg-user@ffmpeg.org> Subject: >> Re: [FFmpeg-user] CBR and bitrate >> 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 <kul.akash...@gmail.com> Date: 8/10/2017 >> 7:18 AM (GMT-05:00) To: FFmpeg user questions <ffmpeg-user@ffmpeg.org> >> 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 >> ffmpeg-user@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >> >> To unsubscribe, visit link above, or email >> ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". >> _______________________________________________ >> ffmpeg-user mailing list >> ffmpeg-user@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >> >> To unsubscribe, visit link above, or email >> ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". >> _______________________________________________ >> ffmpeg-user mailing list >> ffmpeg-user@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >> >> To unsubscribe, visit link above, or email >> ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". >> > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".