fre 2023-07-28 klockan 02:49 +0100 skrev Misha Aizatulin: > Hi all, > > I've been directed here from https://ffmpeg.org/consulting.html as > I'm looking to hire an expert > for what should hopefully be a simple but well-paid job. Please let > me know if anyone has availability! > > What I'm trying to do is capture demoscene demos in full quality: > 4k@60hz (with sound of course). > My rig is presentable: nvidia A6000 and 192G RAM. I am a software > engineer, but don't know very much > about video processing or ffmpeg. > > I tried: > ffmpeg -filter_complex ddagrab=0,hwdownload,format=bgra,framerate=60 > -c:v utvideo output.mkv > > What happened: the first minute or so (always roughly the same > length of time) is captured fine. > Then it drops off the cliff, something like 1 frame per 3 seconds, > but also trying to interpolate > between them, so it looks really weird. > > I was not able to get ffmpeg to report to me any dropped frames > which is upsetting and worrying. > I also don't understand where the interpolation comes from and would > love to turn it off. > > I can't think of a reason for the droppage: my RAM is big enough > to hold the full video (about > 50G total). My only theory is that GPU memory might be getting full > (will check tomorrow), but I'd > expect hwdownload rates to not be that slow. > > Maybe I should use hevc_nvenc with lossless setting, but there's > some talk about the yuv420 > conversion being not lossless... > > Anyway, would really appreciate someone educating me on these and > would happily pay for your time!
I would suggest using .kkapture: http://farbrausch.de/~fg/kkapture/ /Tomas _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
