[Gstreamer-bugs] [Bug 144384] - [opt/mpeg] slow playback

bugzilla-daemon at bugzilla.gnome.org bugzilla-daemon at bugzilla.gnome.org
Wed Jun 16 20:23:34 PDT 2004


http://bugzilla.gnome.org/show_bug.cgi?id=144384
GStreamer | gstreamer (core) | Ver: HEAD CVS





------- Additional Comments From rbultje at ronald.bitfreak.net  2004-06-16 23:23 -------
Something interesting. I confirmed (from spider debug logs) that spider indeed
plugs the above line. However, the same pipeline without spider plugging that
together works fine. How are those different? So in gst-launch:

./gst-launch filesrc location=/media/clips/Metallica\ -\ One.mpg ! spider name=s
! { queue ! ffcolorspace ! ximagesink } s. ! { queue ! audioconvert ! audioscale
! alsasink }

is slow.

./gst-launch filesrc location=/media/clips/Metallica\ -\ One.mpg ! mpegdemux
.video_00 ! mpeg2dec ! { queue ! ffcolorspace ! ximagesink } mpegdemux0.audio_00
! mad ! { queue ! audioconvert ! audioscale ! alsasink }

is ok.

Why? Is this because of the spideridentities? That seems unlikely. So is spider
doing something odd to added elements that doesn't happen by default? Or the
reverse, so not doing something that normally happens?

Also, the spider+alsa+thread one hangs, the spider+oss/esd+thread ones don't
hang but are still extremely sluggish. Clocking logs of oss and alsa follow.

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