new_video_stream 1707 ffmpeg_opt.c       case AVMEDIA_TYPE_VIDEO: ost = new_video_stream(o, oc, -1); break;
new_video_stream 1898 ffmpeg_opt.c                   new_video_stream(o, oc, idx);
new_video_stream 1996 ffmpeg_opt.c                   case AVMEDIA_TYPE_VIDEO:      ost = new_video_stream     (o, oc, src_idx); break;