Unique identifier for the frame. Use this if you need
to get hold of the frame later (like when data is being decoded).
Typical usage in decoders is to set this on the opaque value provided
to the library and get back the frame using gstvideo.video_decoder.VideoDecoder.getFrame
Unique identifier for the frame. Use this if you need to get hold of the frame later (like when data is being decoded). Typical usage in decoders is to set this on the opaque value provided to the library and get back the frame using gstvideo.video_decoder.VideoDecoder.getFrame