MOV_TKHD_FLAG_ENABLED 4528 libavformat/mov.c     st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
MOV_TKHD_FLAG_ENABLED 2939 libavformat/movenc.c         flags |= MOV_TKHD_FLAG_ENABLED;