avfilter/showvolume : add comment for orientation condition

[ffmpeg] / libavfilter / video.c

diff --git a/libavfilter/video.c b/libavfilter/video.c
index 6f9020b9fe0e29acb3fa4d1fe46e5a6242b0b8fd..7a8e587798839b2b252ab60436d90cff10d8b1aa 100644 (file)
--- a/libavfilter/video.c
+++ b/libavfilter/video.c
@@ -43,6 +43,7 @@ AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
 
 AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
 {
+    AVFrame *frame = NULL;
     int pool_width = 0;
     int pool_height = 0;
     int pool_align = 0;
@@ -86,7 +87,13 @@ AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
         }
     }
 
-    return ff_frame_pool_get(link->frame_pool);
+    frame = ff_frame_pool_get(link->frame_pool);
+    if (!frame)
+        return NULL;
+
+    frame->sample_aspect_ratio = link->sample_aspect_ratio;
+
+    return frame;
 }
 
 AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)