From 0c9f35653f77e1cab32e7014a32e3c8f7fa8bbeb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Mon, 16 Feb 2015 12:35:09 +0200
Subject: [PATCH] vtenc: Check if VTSessionCopyProperty() succeeds before using
 the result

https://bugzilla.gnome.org/show_bug.cgi?id=744585
---
 sys/applemedia/vtenc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sys/applemedia/vtenc.c b/sys/applemedia/vtenc.c
index 94bc32d4bf..ef18784ccc 100644
--- a/sys/applemedia/vtenc.c
+++ b/sys/applemedia/vtenc.c
@@ -1014,6 +1014,11 @@ gst_vtenc_update_latency (GstVTEnc * self)
 
   status = VTSessionCopyProperty (self->session,
       kVTCompressionPropertyKey_NumberOfPendingFrames, NULL, &value);
+  if (status != noErr || !value) {
+    GST_INFO_OBJECT (self, "failed to get NumberOfPendingFrames: %d", status);
+    return;
+  }
+
   CFNumberGetValue (value, kCFNumberSInt32Type, &frames);
   if (self->latency_frames == -1 || self->latency_frames != frames) {
     self->latency_frames = frames;