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Bug 725871 - decklinksink: no output, only black
decklinksink: no output, only black
Product: GStreamer
Classification: Platform
Component: gst-plugins-bad
git master
Other Linux
: Normal normal
: 1.4.1
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on:
Reported: 2014-03-07 02:58 UTC by Dave
Modified: 2014-08-11 06:57 UTC
See Also:
GNOME target: ---
GNOME version: ---

Description Dave 2014-03-07 02:58:27 UTC
I am trying to output a pipeline to the decklinksink with no luck.  The card will only output black although the modes change correctly when selected. I have tried filesrc and videotestsrc, with the same result: no error, just black.

Example test: GST_DEBUG=4 gst-launch-1.0 videotestsrc pattern=smpte100 ! video/x-raw,format=UYVY,width=720, height=576, framerate=25/1, interlaced=interleaved, pixel-aspect-ratio=12/11, colormetry=bt601, chromasite=mpeg2 ! decklinksink mode=2

or: videotestsrc pattern=smpte100 ! videoconvert ! videoscale ! decklinksink mode=2

Plugin Details:
  Name                     decklink
  Description              Blackmagic Decklink plugin
  Filename                 /usr/local/lib/gstreamer-1.0/
  License                  LGPL
  Source module            gst-plugins-bad
  Source release date      2014-03-07 02:42 (UTC)
  Binary package           GStreamer Bad Plug-ins
  Origin URL               Unknown package origin

Anyone have a working pipeline I can start from?
Comment 1 Sebastian Dröge (slomo) 2014-08-01 15:00:37 UTC
Can you run with this commit and then provide a debug log with GST_DEBUG=decklinksink:6 ?
Comment 2 Sebastian Dröge (slomo) 2014-08-01 16:03:51 UTC
And this most likely fixes it for real. Please reopen the bug otherwise and include a debug log :)

commit a6808677617a8e8101930947c56103868a286f5e
Author: Sebastian Dröge <>
Date:   Fri Aug 1 18:02:10 2014 +0200

    decklinksink: Initialize pixel format to bmdFormat8BitYUV