From 8c8bf9ecfcef099724c6fbe7822f8536e3e9ddb0 Mon Sep 17 00:00:00 2001
From: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Date: Tue, 2 Mar 2010 00:01:16 +0000
Subject: [PATCH] Make ffmpeg print a message and abort if the name of the
 format provided with -f was unknown.

Originally committed as revision 22140 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 ffmpeg.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ffmpeg.c b/ffmpeg.c
index 3f88089817..4220c278cc 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2852,7 +2852,10 @@ static void opt_input_file(const char *filename)
     int64_t timestamp;
 
     if (last_asked_format) {
-        file_iformat = av_find_input_format(last_asked_format);
+        if (!(file_iformat = av_find_input_format(last_asked_format))) {
+            fprintf(stderr, "Unknown input format: '%s'\n", last_asked_format);
+            av_exit(1);
+        }
         last_asked_format = NULL;
     }