Andrew, should these be checked into GIT source as is? I was waiting to see if any followup on your 2 question commentaries.
On Mon, Apr 21, 2025 at 4:33 PM Andrew Randrianasulu < [email protected]> wrote: > I tried to add other xavc classes as mp4 profiles (see attached patch, do > not forgot to make install after patching), but without altering bt709 x264 > params line - may be we should comment it so it can be overridden by bt2020 > colorimetry? > > also, those does not set flavor sony, may be they should? > > I also try to develop xavc mxf profiles on desktop (those are from Termux, > 3 fps encode at FHD ;) > > вт, 22 апр. 2025 г., 00:54 Andrew Randrianasulu <[email protected]>: > >> In attempt at speeding up hdr10 4k HEVC video playback I tried to >> re-encode it into AVC-intra using this guide: >> >> >> https://www.voukoder.org/forum/thread/1163-replicate-sony-s-xavc-i-s-format/ >> >> basically either >> >> ffmpeg -i input -c:v libx264 -avcintra-class 480 -pix_fmt yuv422p10le >> -preset ultrafast -x264opts avcintra-flavor=sony -c:a pcm_s24le -ar >> 48k output.mxf >> >> or for half size >> >> ffmpeg -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov >> -s 1920x1080 -c:v libx264 -avcintra-class 200 -pix_fmt yuv422p10le >> -preset ultrafast -x264opts avcintra-flavor=sony -c:a pcm_s24le -ar >> 48k output-half.mxf >> >> Note, line errors out when I tried class 480 for 1920x1080 frame size >> >> Both files load into cingg >> >> Original file (4k hdr hevc, 59.94 fps) plays at around 22 fps at >> output x11, project rgba-float. But seeking is sad. Not to mention >> lack of tonemapping. >> >> First 4k avc-intra 4k reencode plays at around 33 fps and seeks much >> better (no artefacts) >> >> 1920x1080 proxy plays at 60 fps, and if I check play every frame and >> try 2x speed forward - at 83 Fps. >> >> But trying two FullHD tracks referencing same "proxy" file set to >> different fade leves with project set to RGBA-float kills fps back to >> 2-3 :) >> >> Encoding at ultrafast preset was 4.5 fps for 4k version and 12 fps for >> FullHD version. >> >> Filesizes: >> >> du -h *.mxf >> 1.0G output-half.mxf >> 2.2G output.mxf >> >> this is just for >> frame= 1149 >> time=00:00:19.15 >> >> Well, I guess without some serious GPU upgrade this machine not gonna >> play HDR 4k :) >> >> Regular 8 bit/SDR 4k somewhat plays in firefox (if file just av1, 24 >> fps), at least on Linux where I can set GPU frequency a bit higher >> than default on nouveau/libre drivers. >> >
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