I'm a tad confused and am looking for assistance in a couple of things.
I googled for a couple of hours, found a plethora of semi-conflicting information,
and am still not much clearer on what FFMPEG commandline switches to use to
convert (re-encode) a 4K HDR webm video,
eg vp9.2 (and other similar samples in various formats from across the web)
1. an mp4 container as h.264/HDR(10-bit)/4k, presmably profile main10 and level 5.1
2. an mkv container as h.264/HDR(10-bit)/4k, presmably profile main10 and level 5.1
3. an mp4 container as hevc/HDR(10-bit)/4k similar to 1 and 2
4. an mkv container as hevc/HDR(10-bit)/4k similar to 1 and 2
I'd prefer to use ffmpeg rather than x264 and x265 if possible.
Any example FFMPEG commandlines and/or link(s) would be very greatly appreciated.
I've seen something similar to this proposed on the web for hevc although I'm yet to give it a try
Code:ffmpeg -input-depth 10 -pix_fmt yuv420p10le -i input.vp9.2.webm -an -c:v libx265 \ -x265-params "colorprim=bt2020:transfer=smpte-st-2084:colormatrix=bt2020nc:master-display=G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,10):max-cll=0,0:hdr" \ -profile:v main10 -level:v 5.1 -crf 15 output.mp4
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H264 cannot encode to HDR. Only HEVC can encode to HDR.
For H264, the best you'll get with 10bit is i444.
OK Thank you.