avcodec/qsvenc: Fix Unkown typo

Reviewed-by: Lou Logan <lou@lrcd.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/qsvenc.c

@@ -1346,7 +1346,7 @@ int ff_qsv_encode(AVCodecContext *avctx, QSVEncContext *q,
             pict_type = AV_PICTURE_TYPE_B;
         else if (bs->FrameType == MFX_FRAMETYPE_UNKNOWN) {
             pict_type = AV_PICTURE_TYPE_NONE;
-            av_log(avctx, AV_LOG_WARNING, "Unkown FrameType, set pict_type to AV_PICTURE_TYPE_NONE.\n");
+            av_log(avctx, AV_LOG_WARNING, "Unknown FrameType, set pict_type to AV_PICTURE_TYPE_NONE.\n");
         } else {
             av_log(avctx, AV_LOG_ERROR, "Invalid FrameType:%d.\n", bs->FrameType);
             return AVERROR_INVALIDDATA;