qsvenc: do not try to close the encoder if the session is NULL

diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index 752777bf309a30204a4f25dfe088e7fcc3f424ea..d6a731f4162889aba634647fe2cd7fefc6e84f60 100644 (file)
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -482,7 +482,8 @@ int ff_qsv_enc_close(AVCodecContext *avctx, QSVEncContext *q)
 {
     QSVFrame *cur;
 
-    MFXVideoENCODE_Close(q->session);
+    if (q->session)
+        MFXVideoENCODE_Close(q->session);
     if (q->internal_session)
         MFXClose(q->internal_session);
     q->session          = NULL;