av_rescale_delta 1752 ffmpeg.c opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts, av_rescale_delta 1920 ffmpeg.c decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts, av_rescale_delta 144 libavutil/mathematics.h int64_t av_rescale_delta(AVRational in_tb, int64_t in_ts, AVRational fs_tb, int duration, int64_t *last, AVRational out_tb);