extern AVInputFormat ff_lrc_demuxer;
extern AVOutputFormat ff_lrc_muxer;
extern AVInputFormat ff_lvf_demuxer;
extern AVInputFormat ff_lxf_demuxer;
extern AVInputFormat ff_m4v_demuxer;
extern AVOutputFormat ff_m4v_muxer;
extern AVInputFormat ff_lrc_demuxer;
extern AVOutputFormat ff_lrc_muxer;
extern AVInputFormat ff_lvf_demuxer;
extern AVInputFormat ff_lxf_demuxer;
extern AVInputFormat ff_m4v_demuxer;
extern AVOutputFormat ff_m4v_muxer;