VQEnhancer/HQScaler/VideoConverter fail with AMF_DIRECTX_FAILED on wrapped D3D11 textures without D3D11_BIND_SHADER_RESOURCE (FRC handles them)

[JuliusBairaktaris]

Setup: Windows 11 Pro build 26200, Radeon RX 9070 XT (RDNA4), driver 32.0.31021.5001, AMF runtime from the driver.

Context: FFmpeg master's libavfilter AMF filters (vqe_amf, vpp_amf, sr_amf, frc_amf) with D3D11VA decoder input. After fixing a surface-format bug in FFmpeg (https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23874), the filters wrap the decoder's texture-array slices via CreateSurfaceFromDX11Native (+ AMFTextureArrayIndexGUID private data to select the slice). The AMF context is created from the same D3D11 device via InitDX11.

Observed — identical input surfaces (NV12, texture array, D3D11_BIND_DECODER only):

• AMFFRC: SubmitInput/QueryOutput work, output is correct.
• AMFVQEnhancer / AMFHQScaler / AMFVideoConverter: Init() succeeds, SubmitInput() succeeds, first QueryOutput() returns AMF_DIRECTX_FAILED (18), no further diagnostics.
• The same components succeed when the decode textures are additionally created with D3D11_BIND_SHADER_RESOURCE (FFmpeg device option SHADER=1).
• DXVA2/DX9 input via CreateSurfaceFromDX9Native: AMFVQEnhancer works with default decoder surfaces.

Repro with ffmpeg git master (patched with the PR above; fails):

ffmpeg -hwaccel d3d11va -hwaccel_output_format d3d11 -i input.mp4 -vf vqe_amf -c:v hevc_amf out.mp4

Works:

ffmpeg -init_hw_device d3d11va=dx11:,SHADER=1 -hwaccel d3d11va -hwaccel_device dx11 \
       -hwaccel_output_format d3d11 -i input.mp4 -vf vqe_amf -c:v hevc_amf out.mp4

Requests:

1. Could the compute-based components internally handle inputs without SRV bind flags (e.g. an internal copy), as FRC apparently does? Typical D3D11VA decoder pools (FFmpeg's default, and many applications) are BIND_DECODER-only.
2. If it must remain a hard requirement, document it in the VQ Enhancer / HQ Scaler / Video Converter API docs.
3. A more specific error than AMF_DIRECTX_FAILED at QueryOutput would help — Init and SubmitInput both succeed, so the failure surfaces late with no hint at the cause.

Happy to test fixes or provide more traces (RDNA4 / Windows 11).