can I use NVdecoder to decode the video with alpha channel and get RGBA images?

first i have a video with alpha channel, and the video is encoded by vp9, the container format is webm. than I use the ffmpeg to demux the the video. it’s ok! but when I use nvdecoder to decode the packet,I want to get the RGBA image for opengl display. the function Nv12ToBgra32 is not deal with the alpha channel. so how can I do to get RGBA format image or data?


Video decode with alpha channel is not supported with NVIDIA Video Codec SDK.


thank you