[Bug 781119] New: No timestamp set when importing dma buffer

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=781119

            Bug ID: 781119
           Summary: No timestamp set when importing dma buffer
    Classification: Platform
           Product: GStreamer
           Version: 1.x
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: todor.tomov at linaro.org
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 349588
  --> https://bugzilla.gnome.org/attachment.cgi?id=349588&action=edit
Copy the timestamp from the exported buffer to the imported one

When dma buffer import is done the timestamp of the imported buffer is not set.
I have hit this problem when using v4l2src and video encoder plugin on DB410c.
When dma buffers are exported from v4l2src and imported in encoder, the missing
timestamp leads to no processing in encoder.

I have made a simple fix to copy the timestamp from the exported buffer to the
imported one - attached in copy_timestamp.patch.

I also attach gst output log and kernel log with v4l2 debug enabled.

I use gstreamer version 1.10.4.

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