[Bug 688476] New: Seek in matroska file fails with not-negotiated error when using playsink

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=688476
  GStreamer | gst-plugins-base | 1.x

           Summary: Seek in matroska file fails with not-negotiated error
                    when using playsink
    Classification: Platform
           Product: GStreamer
           Version: 1.x
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: rawoul at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


The following pipeline fails after a seek with gstreamer 1.0.2 or 1.1.x, when
dvdspu is not installed:

gst-launch-1.0 playbin
uri=http://absolut.zogzog.org/share/samples/mkv/bound.mkv video-sink='navseek
seek-offset=60 ! xvimagesink'

Here is a more specialized version, it does not fail if I use the subtitle
overlay element directly instead of playsink:

gst-launch-1.0 souphttpsrc
location=http://absolut.zogzog.org/share/samples/mkv/bound.mkv ! matroskademux
name=dmx \
multiqueue name=mq \
dmx.video_0 ! mq.sink_0 mq.src_0 ! avdec_h264 ! sink.video_raw_sink \
dmx.subtitle_0 ! mq.sink_1 mq.src_1 ! sink.text_sink \
playsink name=sink video-sink='navseek seek-offset=60 ! xvimagesink' flags=0x7

Displayed error is:

Error displayed gstbasesrc.c(2791): gst_base_src_loop ():
/GstPipeline:pipeline0/GstSoupHTTPSrc:souphttpsrc0:
streaming task paused, reason not-negotiated (-4)

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