[Bug 750381] New: ksvideosrc: buffers have no timestamps

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=750381

            Bug ID: 750381
           Summary: ksvideosrc: buffers have no timestamps
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: philippe_renon at yahoo.fr
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

This pipeline only displays the 1st frame : ksvideosrc ! timeoverlay !
d3dvideosink

Log shows:
0:00:54.704702145  6108   53C69348 WARN                   pango
gstbasetextoverlay.c:2533:gst_base_text_overlay_video_ch
ain:<timeoverlay1> buffer without timestamp, discarding

The issue is related to this changeset :
http://cgit.freedesktop.org/gstreamer/gst-plugins-bad/commit/sys/winks?id=1991b5bb6f1d575bea60b5c6b8d2050edf39ccfc
A quick looks shows that the implemented logic is apparently the reverse of
what was intended.

This pipeline works : ksvideosrc do-timestamp=true ! timeoverlay !
autovideosink

I also tried to fix the issue by reverting the above mentioned changeset.
The pipeline then works as intended but the log shows these warnings:

0:00:23.757778342  5508   53BA9348 INFO              ksvideosrc
gstksvideosrc.c:897:gst_ks_video_src_timestamp_buffer:<ksvideosrc0> lost 2
frames, setting discont flag

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