extern const AVHWAccel ff_wmv3_d3d11va_hwaccel;
extern const AVHWAccel ff_wmv3_d3d11va2_hwaccel;
extern const AVHWAccel ff_wmv3_dxva2_hwaccel;
extern const AVHWAccel ff_wmv3_d3d11va_hwaccel;
extern const AVHWAccel ff_wmv3_d3d11va2_hwaccel;
extern const AVHWAccel ff_wmv3_dxva2_hwaccel;