AV_HWDEVICE_TYPE_D3D12VA does not always exists

[RinCat]

My ffmpeg 6.1.2 in linux does not have AV_HWDEVICE_TYPE_D3D12VA.

      src/av/codec/hwaccel.c:7733:53: error: use of undeclared identifier 'AV_HWDEVICE_TYPE_D3D12VA'; did you mean 'AV_HWDEVICE_TYPE_D3D11VA'?
       7733 |   __pyx_t_3 = __Pyx_PyInt_From_enum__AVHWDeviceType(AV_HWDEVICE_TYPE_D3D12VA); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 27, __pyx_L1_error)
            |                                                     ^~~~~~~~~~~~~~~~~~~~~~~~
            |                                                     AV_HWDEVICE_TYPE_D3D11VA
      /usr/include/libavutil/hwcontext.h:35:5: note: 'AV_HWDEVICE_TYPE_D3D11VA' declared here
         35 |     AV_HWDEVICE_TYPE_D3D11VA,
            |     ^
      17 warnings and 1 error generated.
      error: command '/usr/lib/llvm/19/bin/clang' failed with exit code 1
      [end of output]

[WyattBlue]

You need to have ffmpeg 7 installed if you want to compile from source