CH_CENTER_PAIR    851 libavfilter/avfiltergraph.c     { CH_FRONT_PAIR,      CH_CENTER_PAIR     },
CH_CENTER_PAIR    854 libavfilter/avfiltergraph.c     { CH_CENTER_PAIR,     CH_FRONT_PAIR      },
CH_CENTER_PAIR    855 libavfilter/avfiltergraph.c     { CH_CENTER_PAIR,     CH_WIDE_PAIR       },
CH_CENTER_PAIR    856 libavfilter/avfiltergraph.c     { CH_CENTER_PAIR,     AV_CH_FRONT_CENTER },
CH_CENTER_PAIR    858 libavfilter/avfiltergraph.c     { CH_WIDE_PAIR,       CH_CENTER_PAIR     },
CH_CENTER_PAIR    861 libavfilter/avfiltergraph.c     { AV_CH_FRONT_CENTER, CH_CENTER_PAIR     },