ffmpeg | branch: master | Li, Zhong <zhong...@intel.com> | Thu Dec  7 14:44:27 
2017 +0800| [7c65a76b16bc3a44f1592acde2176f187a058797] | committer: Maxym 
Dmytrychenko

lavc/qsvenc: add error messeage if ICQ unsupported.

Signed-off-by: Zhong Li <zhong...@intel.com>
Signed-off-by: Maxym Dmytrychenko <maxim....@gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7c65a76b16bc3a44f1592acde2176f187a058797
---

 libavcodec/qsvenc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index f6034c443d..5eacf3ca88 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -295,6 +295,12 @@ static int select_rc_mode(AVCodecContext *avctx, 
QSVEncContext *q)
         return AVERROR(EINVAL);
     }
 
+    if (!want_qscale && avctx->global_quality > 0 && !QSV_HAVE_ICQ){
+        av_log(avctx, AV_LOG_ERROR,
+               "ICQ ratecontrol mode requested, but is not supported by this 
SDK version\n");
+        return AVERROR(ENOSYS);
+    }
+
     if (want_qscale) {
         rc_mode = MFX_RATECONTROL_CQP;
         rc_desc = "constant quantization parameter (CQP)";

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