29.06.2018, 15:32
(29.06.2018, 05:13)Selur Wrote: No clue, since I have no clue what you are doing exactly or what the other tools do.
Can have multiple causes.
see here :
Feature Set E
Similar to feature set D but added support for decoding H.264 with a resolution of up to 4096 × 4096 and MPEG-1/MPEG-2 with a resolution of up to 4080 × 4080 pixels. GPUs with VDPAU feature set E support an enhanced error concealment mode which provides more robust error handling when decoding corrupted video streams. Cards with this feature set use a combination of the PureVideo hardware and software running on the shader array to decode HEVC (H.265) as partial/hybrid hardware video decoding.
this might be reason : as ffmpeg is using hwaccell dxva2 then hevc is decoded on CPU for cards with this feature set. for decoding it needs to use hwaccell cuvid ...