AVInputStream     233 ffmpeg.c       struct AVInputStream;
AVInputStream     245 ffmpeg.c           struct AVInputStream *sync_ist; /* input stream to sync against */
AVInputStream     487 ffmpeg.c           const AVInputStream *ist = ost->sync_ist;
AVInputStream    1558 ffmpeg.c           AVInputStream *ist, **ist_table = NULL;
AVInputStream    1577 ffmpeg.c           ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *));
AVInputStream    1582 ffmpeg.c               ist = av_mallocz(sizeof(AVInputStream));