libx264: do not set pic quality if no frame is output

Avoids uninitialized reads.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 17cae71..bcf8b1f 100644 (file)
--- 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;
 }