On Mon, Nov 25, 2019 at 9:28 AM <m_...@o2.pl> wrote: > > I'm little confused about using colorspace conversion, transformation > characteristics. What I'm doing is extracting frames from HDR movie to PNG > files(PNG files will be used in another project). I run following command: > `ffmpeg -i data/hdr_movie.mkv -pix_fmt rgb48be -s:v 1920x1080 > -color_primaries 9 -color_trc 16 -colorspace 9 -color_range 1 > frames/frame_%06d.png` > > ffprobe for data/hdr_movie.mkv is `Video: hevc (Main 10), yuv420p10le(tv)` > > If I run the ffmpeg command, do I really convert colorspace? Or do I > specify colorspace of output frame? Should I also run proper filter, which > will do conversion? And additional question, what is the order of > converting steps? colorspace, characteristics, matrix?
That's probably not doing any conversion. To convert you need to use a filter like colorspace (doesn't support HLG) or zscale. There was a very helpful guide for HDR to SDR conversion with ffmpeg -- https://stevens.li/guides/video/converting-hdr-to-sdr-with-ffmpeg/ The URL returns a Not Found now, but you can still read it via archive.org (although that seems to miss some screenshots) -- https://web.archive.org/web/20190722004804/https://stevens.li/guides/video/converting-hdr-to-sdr-with-ffmpeg/ Hope this helps, 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".
