diff --git a/src/libavcodec/to_lavc_vid_conv.c b/src/libavcodec/to_lavc_vid_conv.c
index e45a9a397..3175fcd0d 100644
--- a/src/libavcodec/to_lavc_vid_conv.c
+++ b/src/libavcodec/to_lavc_vid_conv.c
@@ -1133,7 +1133,6 @@ static void r12l_to_gbrp16le(AVFrame * __restrict out_frame, const unsigned char
 static void r12l_to_gbrp12le(AVFrame * __restrict out_frame, const unsigned char * __restrict in_data, int width, int height)
 {
         r12l_to_gbrpXXle(out_frame, in_data, width, height, 12U);
-        memset(out_frame->data[1], 255, 5000);
 }
 
 static void rg48_to_gbrp12le(AVFrame * __restrict out_frame, const unsigned char * __restrict in_data, int width, int height)