[Bug 663617] New: [gstffmpegdec] Don't use frame-based Multi-threading when upstream is live

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=663617
  GStreamer | gst-ffmpeg | git

           Summary: [gstffmpegdec] Don't use frame-based Multi-threading
                    when upstream is live
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-ffmpeg
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: bilboed at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


When using decoders with live streams, we shouldn't use frame-based
multi-threading (FF_THREAD_FRAME) since it introduces a latency of one frame
per thread.

When receiving the first buffer we should query upstream whether it is a live
stream, and if it's so, set context->thread_type to FF_THREAD_SLICE only.

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