[gst-devel] Performance with gst-launch pipeline and playbin

[Zhao, Halley]

1.       playbin will always link ffmpegcolorspace and videoscale into the pipeline, it will impact the performance compare to customized pipeline.
2.       man gst-launch-0.10 you will see the option ¡°¡ªgst-debug=STRING¡±, next  ¡°gst-launch-0.10 ¨Cgst-debug-help¡± you will see the category
for example:
gst-launch-0.10 --gst-debug=GST_AUTOPLUG:5,xvimagesimk:5,GST_DATAFLOW:5,playbin:5 --gst-debug-no-color playbin uri=file:///home/ume/work/test.m2v

________________________________
From: Manish Sharma [mailto:manishsharma13 at gmail.com]
Sent: 2008Äê11ÔÂ13ÈÕ 16:57
To: gstreamer-devel at lists.sourceforge.net
Subject: [gst-devel] Performance with gst-launch pipeline and playbin

Hi All,

While using the playbin for playback I am observing more CPU usage as compared to gstreamer customized pipeline.
I know that playbin adds some preroll queue before audio video sink. But will it add so much of CPU usage.
I have used 'top' utility to check the CPU usage.

Basically there are two commands which we have used:

1) with playbin

gst-launch playbin uri=file:///media/sdmmc0p1/Comebacks.avi

2) with gst-launch specific pipeline

gst-launch filesrc location=/media/sdmmc0p1/Comebacks.avi ! avidemux name=demux { demux.audio_00 ! queue ! omx_mp3dec ! alsasink } { demux.video_00 ! queue ! omx_h264dec ! xvimagesink }

with (1) we are getting around 20% more CPU consumption wrt (2).


I need one more info is there any way to dump the pipeline created using playbin? I know GST_DEBUG=GST_ELEMENT_FACTORY:3 & GST_DEBUG=*:3.
If there is any specific flag which can give me only the pipeline elements and their connection.

Regards,
Manish

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