Change #278850

Comments

avcodec/d3d12va_encode_av1: add AV1 B-frame (compound prediction) support
This commit adds AV1 B-frame support.
    - Enable B-frame scheduling for the D3D12VA AV1 encoder by setting the
      ref_l0/ref_l1 capability.
    - Stash hidden (non-independent) anchor frames coded data and prepend
      it to the next visible frame packet (show_existing_frame handling).
    - Add FF_HW_FLAG_TIMESTAMP_NO_DELAY to avoid non-monotonic DTS warnings
      at higher B-frame reorder depths.
    - Set 2 B-frames as default(align with D3D12VA H.264 and HEVC encoder)

Example usage:
    - default (2 B-frames will be applied):
      ffmpeg -hwaccel d3d12va -hwaccel_output_format d3d12 -i input.mp4 -c:v av1_d3d12va output.mp4
    - 3 B-frames:
      ffmpeg -hwaccel d3d12va -hwaccel_output_format d3d12 -i input.mp4 -c:v av1_d3d12va -bf 3 output.mp4

Signed-off-by: younengxiao <steven.xiao@amd.com>

Changed files

• libavcodec/d3d12va_encode.c
• libavcodec/d3d12va_encode.h
• libavcodec/d3d12va_encode_av1.c
• libavcodec/hw_base_encode.h