Allow use of @ character in username and passwords embedded in URLs

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/utils.c

@@ -3592,7 +3592,7 @@ void av_url_split(char *proto, int proto_size,
                   char *path, int path_size,
                   const char *url)
 {
-    const char *p, *ls, *ls2, *at, *col, *brk;
+    const char *p, *ls, *ls2, *at, *at2, *col, *brk;
 
     if (port_ptr)               *port_ptr = -1;
     if (proto_size > 0)         proto[0] = 0;
@@ -3627,9 +3627,10 @@ void av_url_split(char *proto, int proto_size,
     /* the rest is hostname, use that to parse auth/port */
     if (ls != p) {
         /* authorization (user[:pass]@hostname) */
-        if ((at = strchr(p, '@')) && at < ls) {
-            av_strlcpy(authorization, p,
-                       FFMIN(authorization_size, at + 1 - p));
+        at2 = p;
+        while ((at = strchr(p, '@')) && at < ls) {
+            av_strlcpy(authorization, at2,
+                       FFMIN(authorization_size, at + 1 - at2));
             p = at + 1; /* skip '@' */
         }