As a general purpose answer when using madVR, DXVA2 Copy-Back is generally the best, since its fully compatible with every feature in all renderers, is fully bit-exact, is reasonably fast (typically faster then D3D11 Copy-Back for complex reasons), and has no feature limitations.
The only reason to use something else is performance, which mostly applies to more low-end systems, where a "Native" mode is required to play 4K 10-bit content, for example, in which case D3D11 Native would be the best option, since it incurs no quality penality. Unfortunately madVR does not support all its features in D3D11 Native mode, so its hard to recommend it as a general option for everyone.
If you use EVR, then DXVA2 Native is usually the best option to use.
Just to mention all modes:
QuickSync or CUVID should generally not be used anylonger, in favor of DXVA2-CopyBack.
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LAV Filters - open source ffmpeg based media splitter and decoders
Last edited by nevcairiel; 17th March 2019 at 13:40.
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