[libav-devel] [PATCH 3/6] In libx264 wrapper, do not set pic quality if no frame is output, avoids uninitialized reads. (cherry picked from commit 46f83e5b3c17a46fa9c86421e7b511cd00cb5d60)

[Alex Converse]

---
 libavcodec/libx264.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)


diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index df4c577..82f769a 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;
 }

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