+ const char *proto_name = avio_find_protocol_name(url);
+
+ if (!proto_name)
+ return AVERROR_INVALIDDATA;
+
+ // only http(s) & file are allowed
+ if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL))
+ return AVERROR_INVALIDDATA;
+ if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
+ ;
+ else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
+ return AVERROR_INVALIDDATA;