find_fps         1403 libavformat/movenc.c     AVRational rational_framerate = find_fps(s, st);
find_fps         6053 libavformat/movenc.c     ret = av_timecode_init_from_string(tc, find_fps(s,  s->streams[src_index]), tcstr, s);
find_fps         6064 libavformat/movenc.c     AVRational rate = find_fps(s, src_st);