Estimate and export motion vectors using D3D12 hardware-accelerated motion estimation. This filter uses GPU hardware motion estimation capabilities available in DirectX 12 Video APIs to achieve significant performance improvements over the software-based mestimate filter.

Motion vectors are stored in frame side data to be used by other filters.

This filter requires the input to be in d3d12 hardware pixel format. The filter uses quarter-pixel precision for motion vector estimation.

This filter accepts the following options:

mb_size

Macroblock size. Only 8 and 16 are supported. Default 16.

ffmpeg -hwaccel d3d12va -hwaccel_output_format d3d12 -i input.mp4 \
        -vf mestimate_d3d12=mb_size=16,hwdownload,format=nv12,codecview=mv=pf \
        -c:v libx264 -preset fast -b:v 5M output.mp4