[HELP] How encode 8bit to 10bit correctly?

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Can I ask you something else? I think I'm doing something wrong, or somewhere in my settings was wrong. I switch to Vapoursynth. In my x264 CLI i see --demuxer raw, but in job log i see --demuxer y4m
i go to VS documentation and find example.

vspipe --y4m script.vpy - | x264 --demuxer y4m - --output encoded.mkv

So in job log all right, but why in my CLI --demuxer raw? I don’t understand how it should be, so I’m afraid to make a mistake. Thx!

     


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PS: In VS script i find

# adjusting output color from: YUV420P8 to YUV420P10 for x264Model (i420)
clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P10, range_s="limited")

In Filtering>Vapoursynth>Misc i find Color Resizer. I can change it to Lanczos, Spline etc. Which one will be the best?