[Bug 752882] New: vtdec: expose kVTDecodeFrame_1xRealTimePlayback

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=752882

            Bug ID: 752882
           Summary: vtdec: expose kVTDecodeFrame_1xRealTimePlayback
    Classification: Platform
           Product: GStreamer
           Version: unspecified
                OS: Mac OS
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: ilya.konstantinov at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

In an RTC pipeline, it might be beneficial to set the
kVTDecodeFrame_1xRealTimePlayback flag on the decoded frames.

>From the VT headers:
"kVTDecodeFrame_1xRealTimePlayback -- A hint to the video decoder that it would
be OK to use a low-power mode that can not decode faster than 1x realtime."

If this cannot be inferred from the incoming GstVideoCodecFrame (I don't
suppose elements with is-live=1 leave any hints on the GstBuffers they
produce), this could be at the very least be configurable through a property.

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