Hello sir, I am sorry I am very new at this. Would you please elaborate more, I didn't get you. On 14 Aug 2015 18:28, "Henk D. Schoneveld" <[email protected]> wrote:
> > On 14 Aug 2015, at 14:46, Robin Lery <[email protected]> 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 <[email protected]> > 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 <[email protected]> > >> 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 > >> [email protected] > >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user > >> > > _______________________________________________ > > ffmpeg-user mailing list > > [email protected] > > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
