From 1f1e24f63f98bb552af49de68121946f5c624943 Mon Sep 17 00:00:00 2001
From: Jan Schmidt <jan@centricular.com>
Date: Tue, 7 Oct 2014 16:33:07 +1100
Subject: [PATCH] viddec: Replicate any 3D/multiview info from input caps onto
 output

---
 ext/libav/gstavviddec.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/ext/libav/gstavviddec.c b/ext/libav/gstavviddec.c
index 94bd368639..0521aecc47 100644
--- a/ext/libav/gstavviddec.c
+++ b/ext/libav/gstavviddec.c
@@ -1026,6 +1026,7 @@ gst_ffmpegviddec_negotiate (GstFFMpegVidDec * ffmpegdec,
       fps_d = 1;
     }
   }
+
   GST_LOG_OBJECT (ffmpegdec, "setting framerate: %d/%d", fps_n, fps_d);
   out_info->fps_n = fps_n;
   out_info->fps_d = fps_d;
@@ -1033,6 +1034,14 @@ gst_ffmpegviddec_negotiate (GstFFMpegVidDec * ffmpegdec,
   /* calculate and update par now */
   gst_ffmpegviddec_update_par (ffmpegdec, in_info, out_info);
 
+  /* Copy stereo/multiview info from upstream if set */
+  if (GST_VIDEO_INFO_MULTIVIEW_MODE (in_info) != GST_VIDEO_MULTIVIEW_MODE_NONE) {
+    GST_VIDEO_INFO_MULTIVIEW_MODE (out_info) =
+        GST_VIDEO_INFO_MULTIVIEW_MODE (in_info);
+    GST_VIDEO_INFO_MULTIVIEW_FLAGS (out_info) =
+        GST_VIDEO_INFO_MULTIVIEW_FLAGS (in_info);
+  }
+
   if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (ffmpegdec)))
     goto negotiate_failed;