Useful for hardware decoders which keep persistent state about the
video parameters, and need to receive any changes to update that state.
@param avctx the codec context
@param type the nal unit type
@param buf the nal unit data buffer
@param buf_size the size of the nal unit in bytes
@return zero if successful, a negative value otherwise
Callback for parameter data (SPS/PPS/VPS etc).
Useful for hardware decoders which keep persistent state about the video parameters, and need to receive any changes to update that state.
@param avctx the codec context @param type the nal unit type @param buf the nal unit data buffer @param buf_size the size of the nal unit in bytes @return zero if successful, a negative value otherwise