Move motion estimation precision check from standalone
`d3d12va_encode_init_motion_estimation_precision()` function into each
codec's init_sequence_params() to reuse existing feature support
queries.
- fixes AV1 using wrong support structure (SUPPORT instead of SUPPORT1)
- eliminates duplicate setup code
- removes redundant CheckFeatureSupport API call
- no intended functional changes other than bug fix
This commit implements ROI (Region of Interest) encoding support for D3D12VA hardware encoders, enabling spatially-adaptive quality control for H.264, HEVC, and AV1 encoders.
Query for `D3D12_VIDEO_ENCODER_RATE_CONTROL_FLAG_ENABLE_DELTA_QP` support during initialization to check whether the hardware support delta QP. If delta QP is supported, then process `AV_FRAME_DATA_REGIONS_OF_INTEREST` side data and generate delta QP maps for each frame.
Sample command line:
ffmpeg.exe -hwaccel d3d12va -hwaccel_output_format d3d12 -i input.mp4 -vf addroi=x=480:y=270:w=960:h=540:qoffset=-1/5 -c:v hevc_d3d12va output.mp4
Intra refresh is a technique that gradually refreshes the video by encoding rows or regions as intra macroblocks/CTUs spread over multiple frames, rather than using periodic I-frames.
This provides better error resilience for video streaming while maintaining more consistent bitrate.
Disable Intra Refresh (This is the default)
ffmpeg -init_hw_device d3d12va -hwaccel d3d12va -hwaccel_output_format d3d12 \
-i input.mp4 \
-c:v h264_d3d12va \
-intra_refresh_mode none \
-intra_refresh_duration 30 \
-g 60 \
output.h264
Enable Intra Refresh
ffmpeg -init_hw_device d3d12va -hwaccel d3d12va -hwaccel_output_format d3d12 \
-i input.mp4 \
-c:v h264_d3d12va \
-intra_refresh_mode row_based \
-intra_refresh_duration 30 \
-g 60 \
output.h264
Parameters
- `-intra_refresh_mode`: Set to `row_based` to enable row-based intra refresh, or `NONE` to disable
- `-intra_refresh_duration`: Number of frames over which to spread the intra refresh (default: 0 = use GOP size)
- `-g`: GOP size (should typically be larger than intra refresh duration)
