Parameters:
- Mpeg2MBInfo *mbi
- Pointer to specific Mpeg2MBInfo structure within an Mpeg2MBInfoArray structure.
- intmotion_bwd_flag
- 1 or 0
Return value:
None.
Description:
Sets motion backward flag field of mbi to motion_bwd_flag. 1 indicates backward motion vectors exist, 0 indicates no backward motion vectors exist.