AV_CLASS_CATEGORY_MUXER   88 libavformat/options.c     else           return AV_CLASS_CATEGORY_MUXER;
AV_CLASS_CATEGORY_MUXER   98 libavformat/options.c     .category       = AV_CLASS_CATEGORY_MUXER,
AV_CLASS_CATEGORY_MUXER   72 libavutil/log.c     [16+AV_CLASS_CATEGORY_MUXER           ] = 13,
AV_CLASS_CATEGORY_MUXER  104 libavutil/log.c     [16+AV_CLASS_CATEGORY_MUXER           ] = 213 << 8 | 0x15,