[Bug 797206] New: There are duplicate frames when cutting and further gluing adjacent segments

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=797206

            Bug ID: 797206
           Summary: There are duplicate frames when cutting and further
                    gluing adjacent segments
    Classification: Platform
           Product: GStreamer
           Version: 1.14.x
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-editing-services
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: oleg.oblozhko at yandex.ru
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 373767
  --> https://bugzilla.gnome.org/attachment.cgi?id=373767&action=edit
output file via Pitivi

Hi!
I want to cut and then combine to segments from original file (duration of file
is 2.569 seconds)

I use next command line for it:
ges-launch-1.0 +clip input.mkv inpoint=0 duration=1.5 +clip input.mkv
inpoint=1.5 duration=1.5 -o output.via.ges-launch.ogv

and I use Pitivi also.

In both cases, the output file contains the jerks of the image at the glue
point (see attachment).

Attachments can be downloaded here (a total of about 6 megabytes):
https://yadi.sk/d/etFcfITZCm-qvQ

input.mkv - original file
output.via.Pitivi.mp4 - output via Pitivi
output.via.ges-launch.ogv - output via ges-launch

What is the problem and how can I avoid it.
Big thanks!

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