[Bug 784210] New: gl: [regression] GstGLUploadMeta feature doesn't show frame in GLX

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=784210

            Bug ID: 784210
           Summary: gl: [regression] GstGLUploadMeta feature doesn't show
                    frame in GLX
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: vjaquez at igalia.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

This pipeline doesn't show any frame:

GST_GL_PLATFORM=glx GST_GL_API=opengl \
   gst-play-1.0 big_buck_bunny_1080p_h264.mov --videosink=glimagesink

When the negotatied caps with glupload are 

video/x-raw(meta:GstVideoGLTextureUploadMeta), format=(string)RGBA,
width=(int)1920, height=(int)1080, framerate=(fraction)24/1,
pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive

I did a bisect and the culprit is commit 0730a55 from bug #782376

Commenting out this it works again

diff --git a/gst-libs/gst/gl/gstglmemory.c b/gst-libs/gst/gl/gstglmemory.c
index 02848f0b7..2212ecbfd 100644
--- a/gst-libs/gst/gl/gstglmemory.c
+++ b/gst-libs/gst/gl/gstglmemory.c
@@ -745,8 +745,8 @@ gst_gl_memory_copy_teximage (GstGLMemory * src, guint
tex_id,

     gl->DeleteFramebuffers (n_fbos, &fbo[0]);

-    if (gl->DrawBuffer)
-      gl->DrawBuffer (GL_NONE);
+    /* if (gl->DrawBuffer) */
+    /*   gl->DrawBuffer (GL_NONE); */
   }

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