Re: [FFmpeg-user] CBR and bitrate
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, jmkhoo1wrote: > 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 Date: 8/10/2017 > 7:18 AM (GMT-05:00) To: FFmpeg user questions > 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".
Re: [FFmpeg-user] CBR and bitrate
yes @manuel its getting bit hard even after setting -b:v 25M -minrate 25M maxrate 25M -bufsize 25M it not generating CBR mode output and i will try for 1 & 2 pass once and convey you if i get the constrained VBR On Fri, Aug 11, 2017 at 11:20 AM, Manuel Tiglio <tig...@icloud.com> wrote: > 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.com@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". > ___ 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".
Re: [FFmpeg-user] CBR and bitrate
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".
Re: [FFmpeg-user] CBR and bitrate
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".
Re: [FFmpeg-user] CBR and bitrate
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".
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 kulkarniDate: 8/10/2017 7:18 AM (GMT-05:00) To: FFmpeg user questions 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".