size of the corresponding packet containing the compressed
frame. It must be accessed using av_frame_get_pkt_size() and
av_frame_set_pkt_size().
It is set to a negative value if unknown.
- encoding: unused
- decoding: set by libavcodec, read by user.
size of the corresponding packet containing the compressed frame. It must be accessed using av_frame_get_pkt_size() and av_frame_set_pkt_size(). It is set to a negative value if unknown. - encoding: unused - decoding: set by libavcodec, read by user.