[totem] thumbnailer: Blacklist video4linux2 plugin

[Robert McQueen <ramcq src gnome org>]

commit 621a387cbe88c8084796dd601e1efc95b6fd2c00
Author: Robert McQueen <rob endlessm com>
Date:   Wed Nov 15 17:27:33 2017 +0000

    thumbnailer: Blacklist video4linux2 plugin
    
    On most V4L2 platforms supported by GStreamer, there are a finite number
    of M2M decoders and if the thumbnailer is using them, it prevents the
    user from playing back their real video.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790491

 src/totem-video-thumbnailer.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/totem-video-thumbnailer.c b/src/totem-video-thumbnailer.c
index 39d2d87..2caafa5 100644
--- a/src/totem-video-thumbnailer.c
+++ b/src/totem-video-thumbnailer.c
@@ -388,7 +388,8 @@ thumb_app_setup_play (ThumbApp *app)
        GstRegistry *registry;
        const char *blacklisted_plugins[] = {
          "bmcdec",
-         "vaapi"
+         "vaapi",
+         "video4linux2"
        };
        guint i;