![]() I also tried to use the very interesting NVEencc, where one can set such parameters on the commandline, however I found that a number of encodes had a loss of audio sync whereas with ffmpeg the audio sync was maintained even if the metadata was missing. (eg the -x265-params "colormatrix=bt470bg") then when I ffprobe the output file I see that none of the metadata is there, neither copied from the input file nor from the commandline parameters which I assume are passed to libx265 and not the NV encoder. ![]() ![]() 5:cx=3:cy=3:ca=0.5,hwdownload" -c:v hevc_nvenc -pix_fmt yuv420p -profile:v main -level 5.1 -preset slow -rc vbr_hq -cq 26 -rc-lookahead 32 -spatial_aq 1 -x265-params "colormatrix=bt470bg" -c:a libfdk_aac -cutoff 18000 -ab 384k -ar 48000 -threads 0 -movflags +faststart -y "4" " ffmpeg.exe" -hide_banner -v verbose -strict -1 -init_hw_device opencl=ocl:1.0 -filter_hw_device ocl -threads 0 -i "4" -threads 0 -sws_flags lanczos+accurate_rnd+full_chroma_int+full_chroma_i np -filter_complex "yadif=0:0:0,hwupload,unsharp_opencl=lx=3:ly=3:la=0.
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