Lurking. Important. Thank you. On Thu, Mar 25, 2021 at 5:17 PM Pavel Koshevoy <pkoshe...@gmail.com> wrote:
> On Thu, Mar 25, 2021 at 9:27 AM Craig L. <ffm...@trafficality.com> wrote: > > > I recently started finding certain videos were washing out upon H.264 > > conversion. > > > > > > After doing some research I found that if I added -color_primaries > > bt2020 to the command, the color would come out correctly, but ONLY if > > the video was played in Quicktime. When played in Chrome, it would look > > washed out. > > > > Here is a link to a screengrab showing the video in quicktime on the > > left and in Chrome on the right. Same video. > > > > > > *https://snipboard.io/N8nYv0.jpg* <https://snipboard.io/N8nYv0.jpg> > > > > > > > > > > After much research I can't figure out how to handle this? > > > > What is the correct way to convert these videos that I suppose are 10 > > bit HDR into H.264 so that they will play correctly in Chrome, etc. > > > > > > > > This is my current command: > > > > /usr/local/bin/ffmpeg -i "156237-Video2.mov" -filter_complex > > "scale=480:270" -color_trc smpte2084 -color_primaries bt2020 -c:v > > libx264 -profile:v high -pix_fmt yuv420p -level 5.1 -preset ultrafast > > -movflags faststart -vsync 2 -c:a aac -b:a 128k -y > > 156237-Video2.mov-16-9-1616621202.mp4 > > > > > > > > > > > > For best possible player compatibility you really need to convert from > HDR10 to SDR (bt709). > > To do that you need to use either colorspace or zscale ffmpeg filter. The > colorspace filter didn't support HLG the last time I checked, but that > wouldn't matter if your source is HDR10, not HLG. > Since you'd be converting from high dynamic range to standard dynamic range > you would also need to use the tonemap filter. > > There is probably a LUT file somewhere that implements HDR10 -> BT709 color > space conversion and tone mapping in one step, skipping zscale/tonemap. If > you had such LUT you could use it with lut3d filter. > > Pavel. > _______________________________________________ > 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". -- yoctobio.me ---------------------- Sent from a mobile phone. _______________________________________________ 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".
