From 4d534ad8e8fc0fdad2b1879bd2a02ce3939e7f8a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Tue, 25 Sep 2018 16:56:24 +0300
Subject: [PATCH] glviewconvert: Copy composition meta from the primary buffer
 to both outputs

Without this, glviewconvert (and thus glimagesink) will drop all overlay
composition metas.
---
 gst-libs/gst/gl/gstglviewconvert.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/gst-libs/gst/gl/gstglviewconvert.c b/gst-libs/gst/gl/gstglviewconvert.c
index 7e1e70ddb0..35f380c89f 100644
--- a/gst-libs/gst/gl/gstglviewconvert.c
+++ b/gst-libs/gst/gl/gstglviewconvert.c
@@ -2354,18 +2354,38 @@ gst_gl_view_convert_get_output (GstGLViewConvert * viewconvert,
 
   outbuf = priv->primary_out;
   if (outbuf) {
+    GstVideoOverlayCompositionMeta *composition_meta;
+
     gst_buffer_copy_into (outbuf, priv->primary_in,
         GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
     GST_BUFFER_FLAG_SET (outbuf,
         GST_VIDEO_BUFFER_FLAG_FIRST_IN_BUNDLE |
         GST_VIDEO_BUFFER_FLAG_MULTIPLE_VIEW);
+
+    composition_meta =
+        gst_buffer_get_video_overlay_composition_meta (priv->primary_in);
+    if (composition_meta) {
+      GST_DEBUG ("found video overlay composition meta, applying on output.");
+      gst_buffer_add_video_overlay_composition_meta
+          (outbuf, composition_meta->overlay);
+    }
   }
 
   if (priv->auxilliary_out) {
+    GstVideoOverlayCompositionMeta *composition_meta;
+
     gst_buffer_copy_into (priv->auxilliary_out,
         priv->primary_out, GST_BUFFER_COPY_FLAGS, 0, -1);
     GST_BUFFER_FLAG_UNSET (priv->auxilliary_out,
         GST_VIDEO_BUFFER_FLAG_FIRST_IN_BUNDLE);
+
+    composition_meta =
+        gst_buffer_get_video_overlay_composition_meta (priv->primary_out);
+    if (composition_meta) {
+      GST_DEBUG ("found video overlay composition meta, applying on output.");
+      gst_buffer_add_video_overlay_composition_meta
+          (priv->auxilliary_out, composition_meta->overlay);
+    }
   }
   priv->primary_out = NULL;