AV_CLASS_CATEGORY_NA   85 libavdevice/avdevice.c     AVClassCategory category = AV_CLASS_CATEGORY_NA;
AV_CLASS_CATEGORY_NA   63 libavutil/log.c     [16+AV_CLASS_CATEGORY_NA              ] =  7,
AV_CLASS_CATEGORY_NA   94 libavutil/log.c     [16+AV_CLASS_CATEGORY_NA              ] = 250 << 8 | 0x09,
AV_CLASS_CATEGORY_NA  207 libavutil/log.c         ||  avc->category >= AV_CLASS_CATEGORY_NB) return AV_CLASS_CATEGORY_NA + 16;
AV_CLASS_CATEGORY_NA  248 libavutil/log.c     if(type) type[0] = type[1] = AV_CLASS_CATEGORY_NA + 16;