MOV_PRFT_NONE     106 libavformat/movenc.c     { "write_prft", "Write producer reference time box with specified time source", offsetof(MOVMuxContext, write_prft), AV_OPT_TYPE_INT, {.i64 = MOV_PRFT_NONE}, 0, MOV_PRFT_NB-1, AV_OPT_FLAG_ENCODING_PARAM, "prft"},
MOV_PRFT_NONE    4758 libavformat/movenc.c     if (mov->write_prft > MOV_PRFT_NONE && mov->write_prft < MOV_PRFT_NB)