vah264dec:stream will be green when using vah264dec to decode h264stream in the few seconds after starting

when using vah264dec to decode h264 stream,the first frame and the frame which is in a few seconds is so green.But using avdec_h264 is normal.Most of the h264streamer is P frame and the origin video is not changed widely

This is first frame which cut in the stream to be jpeg

avdec_h264