On 14 Aug 2015, at 14:46, Robin Lery <robinl...@gmail.com> wrote: > Hello, > Thank you for your guidance. Actual the videos that I'll be encoding are > for web video, so I think the bit rate matters. And as for the threads I > want to use all the threads possible. I think -threads 0 balance the loads > across all the cores automatically. What would be the best ffmpeg command > in your opinion for fast encoding with constant specified bit rates (i.e > 500k and 1000k)? ConstantBitrate is too much or too little CRF/ConstantQuality is …. > > Thank you. > > On Thu, Aug 13, 2015 at 7:43 PM, Moritz Barsnick <barsn...@gmx.net> wrote: > >> On Thu, Aug 13, 2015 at 09:03:48 -0500, Steve Boyer wrote: >>> On Wed, Aug 12, 2015 at 11:03 PM, Robin Lery <robinl...@gmail.com> >> wrote: >>>> I know about presets but faster presets lose the video quality. Are >> there >>> >>> It's my experience that CRF more directly affects the quality, and >>> presets more influence filesize and encoding speed; a preset of slow >>> will be ABOUT the same quality as veryfast but the bitrate between the >>> two would be drastically different (in my opinion and eyes). >> >> The presets were designed to trade off speed versus size, using the >> same CRF and thereby (approximately) the same quality. But Robin is >> using: >> >>> -maxrate 1000k >> >> thereby limiting what the encoder can achieve in terms of quality. >> >>> I've used -threads=1 successfully after input, before output file name. >> >> Did Robin want to use more threads, or less? I understand ffmpeg >> automatically tries to choose the right amount of threads. >> >> (That said, my libx264 claims: "Threading capabilities: no", but I read >> differing stuff on that.) >> >> Moritz >> _______________________________________________ >> ffmpeg-user mailing list >> ffmpeg-user@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >> > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
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