libavdevice/gdigrab: fix ffmpeg -devices doesn't show gdigrab

missed the category AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT lead to
ffmpeg -devices doesn't show gdigrab as a input device

FIx #7848

Found-by: dangibson
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

diff --git a/libavdevice/gdigrab.c b/libavdevice/gdigrab.c
index b226bd0831495a116d9f66f4b5af622d265d3e78..f4444406fa65159208631c5102ab5b15f5731f2a 100644 (file)
--- a/libavdevice/gdigrab.c
+++ b/libavdevice/gdigrab.c
@@ -647,6 +647,7 @@ static const AVClass gdigrab_class = {
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
+    .category   = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
 };
 
 /** gdi grabber device demuxer declaration */