[Bug 697690] New: gst-libav doesn't have the same multithread performance as ffplay

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=697690
  GStreamer | gst-libav | git

           Summary: gst-libav doesn't have the same multithread
                    performance as ffplay
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-libav
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: fykcee1 at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


While playing back some films ffplay is seen more balanced CPU occupancy then
gstreamer.

Sample film:
http://dev.lemote.com/files/upload/software/temp/tears_of_steel_720p.mkv

Following change solves this:
diff --git a/ext/libav/gstavviddec.c b/ext/libav/gstavviddec.c
index 0e909a4..f96c21b 100644
--- a/ext/libav/gstavviddec.c
+++ b/ext/libav/gstavviddec.c
@@ -434,7 +434,7 @@ gst_ffmpegviddec_set_format (GstVideoDecoder * decoder,
   } else
     ffmpegdec->context->thread_count = ffmpegdec->max_threads;

-  ffmpegdec->context->thread_type = FF_THREAD_SLICE;
+  ffmpegdec->context->thread_type = FF_THREAD_SLICE | FF_THREAD_FRAME;

   /* open codec - we don't select an output pix_fmt yet,
    * simply because we don't know! We only get it

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