Le 06/10/2016 à 12:29, Michael Niedermayer a écrit :
Does this reduce writing speed ?
in the same manner as e.g. reducing FFV1 writing speed with default configuration, i.e. with CRC per slice (same kind of job). On my machine (i7 from 2012), CRC computing takes less than 1% of the CPU when I decode FFV1, so I estimate the impact of CRC on both FFV1 level and Matroska level to less than 2% in case FFV1 is used. I don't think it would be a more with e.g. AVC as frame byte size is smaller.
for example when remuxing high bitrate data like rawvideo ?
On my machine (i7 from 2012), with the "4 bytes at once" algorithm used by FFmpeg if I well understood FFmpeg code on this part, I benched CRC computing at 1 GB/s per core, so it should be more than enough also for rawvideo.
CRC element could be an option as it is for FFV1, but I argue for having it set by default, for the same reasons it is set by default with FFV1.
[...]
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
