AV_CLASS_CATEGORY_BITSTREAM_FILTER   83 libavcodec/bsf.c     .category         = AV_CLASS_CATEGORY_BITSTREAM_FILTER,
AV_CLASS_CATEGORY_BITSTREAM_FILTER   77 libavutil/log.c     [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] =  9,
AV_CLASS_CATEGORY_BITSTREAM_FILTER  109 libavutil/log.c     [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 192 << 8 | 0x14,