From: Dan Dennedy <dan@dennedy.org>
Date: Sat, 25 Jan 2014 06:58:11 +0000 (-0800)
Subject: Fix crash on audio only clip using uninialized mutex.
X-Git-Url: https://git.sesse.net/?p=mlt;a=commitdiff_plain;h=31cb473c0599cadfcab3e8d78d3585595751c720

Fix crash on audio only clip using uninialized mutex.

This was reproducible on Windows using winpthreads, which apparently
does not gracefully handle calls on uninitialized mutexes.
---

diff --git a/src/modules/avformat/producer_avformat.c b/src/modules/avformat/producer_avformat.c
index 4fc10523..cbdd38fd 100644
--- a/src/modules/avformat/producer_avformat.c
+++ b/src/modules/avformat/producer_avformat.c
@@ -1949,7 +1949,7 @@ static void producer_set_up_video( producer_avformat self, mlt_frame frame )
 	}
 
 	// Update the video properties if the index changed
-	if ( index != self->video_index )
+	if ( context && index > -1 && index != self->video_index )
 	{
 		// Reset the video properties if the index changed
 		self->video_index = index;