From c3467bbc5250c5b9f35a5e174dcbbdb2eac50706 Mon Sep 17 00:00:00 2001
From: Simon Thelen <ffmpeg-dev@c-14.de>
Date: Mon, 2 Nov 2015 16:36:16 +0100
Subject: [PATCH] ffmpeg: Don't try and write sdp info if none of the outputs
 had an rtp format.

Fixes a segfault when trying to write nonexistent rtp information.

Signed-off-by: Simon Thelen <ffmpeg-dev@c-14.de>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 70fb5eadc580a82c4b977a1233d70ad0041faba0)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 ffmpeg.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ffmpeg.c b/ffmpeg.c
index b0cf42916d..8fb26c2f7e 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2337,6 +2337,9 @@ static void print_sdp(void)
         }
     }
 
+    if (!j)
+        goto fail;
+
     av_sdp_create(avc, j, sdp, sizeof(sdp));
 
     if (!sdp_filename) {
@@ -2352,6 +2355,7 @@ static void print_sdp(void)
         }
     }
 
+fail:
     av_freep(&avc);
 }