Le dim. 18 nov. 2018 à 01:57, Carl Eugen Hoyos <ceffm...@gmail.com> a écrit :
> 2018-11-18 0:28 GMT+01:00, Martin Vignali <martin.vign...@gmail.com>: > > > 012 : Add 12b support for 444 by default, > > Is it slower? > I believe that once 12 bit decoding is not slower, it should > be the default for 422. > Yes 12b is much slower On a 422 HQ file : 10b decoding precision : frame= 3316 fps=280 q=-0.0 Lsize=N/A time=00:02:12.64 bitrate=N/A speed=11.2x bench: utime=88.741s stime=1.257s rtime=11.833s 12b decoding precision : frame= 3316 fps=176 q=-0.0 Lsize=N/A time=00:02:12.64 bitrate=N/A speed=7.02x bench: utime=145.096s stime=0.769s rtime=18.894s > > > and add user option for setting decoding precision > > I wonder if this is necessary and correct: Calling applications > should choose the bit depth depending on their use case, if > ffmpeg (the cli) really doesn't support that, it is a missing > feature, different pix_fmts for one decoder (and input file) is > not new in FFmpeg, MPlayer had used this feature since > forever. > > I don't know, how to get the "wanted" pix_fmt output using ffmpeg cli, and I don't know, what the general "rules" of this project for multiple pix_fmt output for the same input file. If user option for decoding precision need to be remove, i think 422 need to stay in 10b decoding, and 444 need to be decode in 12b. Martin _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel