On Thu, Mar 25, 2021 at 5:59 PM Pavel Koshevoy <pkoshe...@gmail.com> wrote:
> > > On Thu, Mar 25, 2021, 16:34 Craig L. <ffm...@trafficality.com> wrote: > >> I think I tried exactly that based upon this stackoverflow question: >> >> >> https://stackoverflow.com/questions/64981984/ffmpeg-transcode-uhd-h265-to-sdr-h264-without-color-loss >> >> The example in that post uses this command: >> >> |ffmpeg -i 4K.ts -vf >> zscale=t=linear:npl=100,format=gbrpf32le,zscale=p=bt709,tonemap=tonemap=hable:desat=0,zscale=t=bt709:m=bt709:r=tv,format=yuv420p >> >> -c:v h264 -crf 19 -preset ultrafast output.mp4 | >> > > > I think tonemap should be upstream from the 2nd zscale filter > > > Also, you may still need to specify the input color_trc, primaries, colorspace, range for the 1st zscale filter ... in case your source doesn't signal those. something like this: zscale=tin=smpte2084:pin=2020:min=2020_ncl:rin=limited:t=linear:npl=100,format=gbrpf32le,tonemap=tonemap=hable:desat=0,zscale=p=bt709,m=bt709:t=bt709:r=limited,format=yuv420p _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
