stevxiao 64b9be2dc5 avcodec/d3d12va_encode: support motion estimation precision mode ...

By default, the D3D12 video encoder uses MAXIMUM, which means no restriction—it uses the highest precision supported by the driver.

Applications may want to reduce precision to improve speed or reduce power consumption. This requires the encoder to support user-defined motion estimation precision modes.

D3D12_VIDEO_ENCODER_MOTION_ESTIMATION_PRECISION_MODE defines several precision modes:

maximum: No restriction, uses the maximum precision supported by the driver.
full_pixel: Allows only full-pixel precision.
half_pixel: Allows half-pixel precision.
quarter-pixel: Allows quarter-pixel precision.
eighth-pixel: Allows eighth-pixel precision (introduced in Windows 11).

Sample Command Line:

ffmpeg -hwaccel d3d12va -hwaccel_output_format d3d12 -extra_hw_frames 20 -i input.mp4 -an -c:v h264_d3d12va -me_precision half_pixel out.mp4

2025-12-22 05:35:04 +00:00

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