AV_CLASS_CATEGORY_MUXER   84 libavformat/options.c     else           return AV_CLASS_CATEGORY_MUXER;
AV_CLASS_CATEGORY_MUXER   94 libavformat/options.c     .category       = AV_CLASS_CATEGORY_MUXER,
AV_CLASS_CATEGORY_MUXER   66 libavutil/log.c     [16+AV_CLASS_CATEGORY_MUXER           ] = 13,
AV_CLASS_CATEGORY_MUXER   97 libavutil/log.c     [16+AV_CLASS_CATEGORY_MUXER           ] = 213 << 8 | 0x15,