Add parameter `coder` for users to select entropy coding in D3D12 H264
encoding.
Named constants `cabac` (1) and `cavlc` (0) are supported.
Default is CABAC (1). If the driver does not support CABAC, a warning is
logged and encoding falls back to CAVLC.
Usage:
CABAC (default): `-coder cabac` or `-coder 1`
CAVLC: `-coder cavlc` or `-coder 0`
Sample command line:
```
ffmpeg -hwaccel d3d12va -hwaccel_output_format d3d12 -i input.mp4 -c:v h264_d3d12va -coder cavlc -y output.mp4
```
Improves error diagnostics for D3D12 video encoders check feature support by adding
detailed ValidationFlags reporting when driver validation fails.
This made it easy for users to identify which specific feature was
unsupported without manually decoding the flags.
Signed-off-by: younengxiao <steven.xiao@amd.com>
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)
