CH_FRONT_PAIR     851 libavfilter/avfiltergraph.c     { CH_FRONT_PAIR,      CH_CENTER_PAIR     },
CH_FRONT_PAIR     852 libavfilter/avfiltergraph.c     { CH_FRONT_PAIR,      CH_WIDE_PAIR       },
CH_FRONT_PAIR     853 libavfilter/avfiltergraph.c     { CH_FRONT_PAIR,      AV_CH_FRONT_CENTER },
CH_FRONT_PAIR     854 libavfilter/avfiltergraph.c     { CH_CENTER_PAIR,     CH_FRONT_PAIR      },
CH_FRONT_PAIR     857 libavfilter/avfiltergraph.c     { CH_WIDE_PAIR,       CH_FRONT_PAIR      },
CH_FRONT_PAIR     860 libavfilter/avfiltergraph.c     { AV_CH_FRONT_CENTER, CH_FRONT_PAIR      },