@@ -265,17 +265,17 @@ int ffurl_alloc(URLContext **puc, const char *filename, int flags,

 {

     URLProtocol *up = NULL;

     char proto_str[128], proto_nested[128], *ptr;

-    size_t proto_len = strspn(filename, URL_SCHEME_CHARS);

+    const char *proto_end = strchr(filename, ':');

     if (!first_protocol) {

         av_log(NULL, AV_LOG_WARNING, "No URL Protocols are registered. "

                                      "Missing call to av_register_all()?\n");

     }

-    if (filename[proto_len] != ':' || is_dos_path(filename))

+    if (!proto_end || is_dos_path(filename))

         strcpy(proto_str, "file");

     else

-        av_strlcpy(proto_str, filename, FFMIN(proto_len+1, sizeof(proto_str)));

+        av_strlcpy(proto_str, filename, FFMIN(proto_end-filename+1, sizeof(proto_str)));

     av_strlcpy(proto_nested, proto_str, sizeof(proto_nested));

     if ((ptr = strchr(proto_nested, '+')))