[FFmpeg-devel] what is meanning of this function ?

[redsuyu at foxmail.com]

  What is meanning of this function ?       


ffmpeg.c:1964
 if (pkt.pts != AV_NOPTS_VALUE)
            pkt.pts += av_rescale_q(input_files_ts_offset[ist->file_index], AV_TIME_BASE_Q, ist->st->time_base);
										thank you 
                                   suyu