---
 libavcodec/libx264.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 3ccdb9393..ed387fff8 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -412,6 +412,9 @@ static av_cold int X264_init(AVCodecContext *avctx)
         } else if (x4->cqp >= 0) {
             x4->params.rc.i_rc_method   = X264_RC_CQP;
             x4->params.rc.i_qp_constant = x4->cqp;
+        } else if (avctx->flags & AV_CODEC_FLAG_QSCALE) {
+            x4->params.rc.i_rc_method   = X264_RC_CQP;
+            x4->params.rc.i_qp_constant = avctx->global_quality;
         }
 
         if (x4->crf_max >= 0)
-- 
2.11.0
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