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Do not set the ffdshow raw video filter to output in 10bit (P010). Avisynth (the 'engine' SVP is uses) only processes the video in 8 bits, so any 10bit source will have already been transformed to 8bit before reaching SVP by the decoder. By forcing ffdshow to output in 10bit, you're unnecessarily transforming 8bit video to 10bit, only for it to be transformed back to 8bit later on by the renderer. It is better to set ffdshow to output directly in YV12 to avoid the extra steps.