avisynth_next_stream  607 libavformat/avisynth.c     avisynth_next_stream(s, &st, pkt, &discard);
avisynth_next_stream  611 libavformat/avisynth.c             avisynth_next_stream(s, &st, pkt, &discard);
avisynth_next_stream  617 libavformat/avisynth.c             avisynth_next_stream(s, &st, pkt, &discard);