MATROSKA_ID_AUDIOCHANNELS  501 libavformat/matroskadec.c     { MATROSKA_ID_AUDIOCHANNELS,        EBML_UINT,  0, offsetof(MatroskaTrackAudio, channels),   { .u = 1 } },
MATROSKA_ID_AUDIOCHANNELS 1327 libavformat/matroskaenc.c         put_ebml_uint  (pb, MATROSKA_ID_AUDIOCHANNELS    , par->channels);