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 <[email protected]>
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit 70fb5eadc580a82c4b977a1233d70ad0041faba0)

Signed-off-by: Michael Niedermayer <[email protected]>

1 files changed, 4 insertions, 0 deletions

diff --git a/ffmpeg.c b/ffmpeg.c
index 8bf0aa87c0..b65ee7144e 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2370,6 +2370,9 @@ static void print_sdp(void)
         }
     }
 
+    if (!j)
+        goto fail;
+
     av_sdp_create(avc, j, sdp, sizeof(sdp));
 
     if (!sdp_filename) {
@@ -2385,6 +2388,7 @@ static void print_sdp(void)
         }
     }
 
+fail:
     av_freep(&avc);
 }