av_dict_set(&o->g->format_opts,"packetsize","2048",AV_DICT_DONT_OVERWRITE);// from www.mpucoder.com: DVD sectors contain 2048 bytes of data, this is also the size of one pack.
opt_default(NULL,"packetsize","2048");// from www.mpucoder.com: DVD sectors contain 2048 bytes of data, this is also the size of one pack.