[FFmpeg-cvslog] avio: print a warning from ffurl_alloc() if no protocols are allocated.

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Mon Nov  7 04:18:53 2011 +0100| [728e6d979bb16b2e19db96869a7af80c24eb7aeb] | committer: Michael Niedermayer

avio: print a warning from ffurl_alloc() if no protocols are allocated.
Fixes Ticket618

Based on code by teratorn
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=728e6d979bb16b2e19db96869a7af80c24eb7aeb
---

 libavformat/avio.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/libavformat/avio.c b/libavformat/avio.c
index 2bdad73..47b2d51 100644
--- a/libavformat/avio.c
+++ b/libavformat/avio.c
@@ -223,6 +223,11 @@ int ffurl_alloc(URLContext **puc, const char *filename, int flags)
     char proto_str[128], proto_nested[128], *ptr;
     size_t proto_len = strspn(filename, URL_SCHEME_CHARS);
 
+    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))
         strcpy(proto_str, "file");
     else