[Bug 750125] New: Decklink: Frame Stepping Event does not work.

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=750125

            Bug ID: 750125
           Summary: Decklink: Frame Stepping Event does not work.
    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: frederic.turmel at arris.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Pipeline is:

filesink->queue-> videoparse -> queue-> videoconvert -> queue-> 
decklinkvideosink


When issuing the following command in python

sink.send_event(Gst.Event.new_step(Gst.Format.BUFFERS, 1, 1, True, False))

I can see that the position of the timeline is moving forward for each step but
I don't see the video moving forward.

When stepping multiple time the pipeline crash after maybe 10-15 times then I
the following error:

0:00:37.042014985 26959      0x2b2bed0 WARN       decklinkvideosink
gstdecklinkvideosink.cpp:472:gst_decklink_video_sink_prepare:<decklinkvideosink0>
error: Failed to create video frame: 0x80000008
0:00:37.042057226 26959      0x2b2bed0 INFO        GST_ERROR_SYSTEM
gstelement.c:1837:gst_element_message_full:<decklinkvideosink0> posting
message: GStreamer encountered a general stream error.
0:00:37.042081956 26959      0x2b2bed0 INFO        GST_ERROR_SYSTEM
gstelement.c:1860:gst_element_message_full:<decklinkvideosink0> posted error
message: GStreamer encountered a general stream error.
0:00:37.042124896 26959      0x2b2bf70 INFO                    task
gsttask.c:315:gst_task_func:<qA:src> Task going to paused
0:00:37.042131845 26959      0x2b2c0a0 INFO                 basesrc
gstbasesrc.c:2851:gst_base_src_loop:<testSource> pausing after gst_pad_push() =
error

I tested the pipeline with frame stepping autovideosink and it was stepping
correctly.

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