lavc/qsvenc: always allocate the array to store mfxExtBuffer points

This allows us to append mfxExtBuffer per user's settings

Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/libavcodec/qsvenc.h b/libavcodec/qsvenc.h
index c71bf2ed50..f2f0687bfe 100644
--- a/libavcodec/qsvenc.h
+++ b/libavcodec/qsvenc.h
@@ -196,6 +196,7 @@ typedef struct QSVEncContext {
     int         nb_extparam_internal;
 
     mfxExtBuffer **extparam;
+    int         nb_extparam;
 
     AVFifo *async_fifo;