From 5caa2de19ece830e32c95731bc92a423d55cff0c Mon Sep 17 00:00:00 2001
From: Baptiste Coudurier <baptiste.coudurier@gmail.com>
Date: Sat, 29 Jan 2011 17:05:42 -0800
Subject: [PATCH] libx264: do not set pic quality if no frame is output

Avoids uninitialized reads.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
---
 libavcodec/libx264.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 17cae713ef..bcf8b1f688 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -144,7 +144,8 @@ static int X264_frame(AVCodecContext *ctx, uint8_t *buf,
     }
 
     x4->out_pic.key_frame = pic_out.b_keyframe;
-    x4->out_pic.quality   = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
+    if (bufsize)
+        x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
 
     return bufsize;
 }