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Performance with gst-launch pipeline and playbin

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Manish Sharma-5

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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pancake-3

Re: Performance with gst-launch pipeline and playbin

You can dump the pipeline in XML with the GstXML api but you will have
to do it from an application
using playbin. (write a small hello world for this) it cannot be done
from gst-launch atm, but will be
a nice feature imho :)

Manish Sharma wrote:

> 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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>
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> Build the coolest Linux based applications with Moblin SDK & win great prizes
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Stefan Sauer

Re: Performance with gst-launch pipeline and playbin

In reply to this post by Manish Sharma-5

hi,

Manish Sharma schrieb:

you can use "gst-launch -v ..." or you can use
GST_DEBUG_DUMP_DOT_DIR=<path> gst-launch ... and convert the generated
dot files to e.g. png with "dot"

Stefan

> Regards,
> Manish
>
> ------------------------------------------------------------------------
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great prizes
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Zhao, Halley

Re: Performance with gst-launch pipeline and playbin

In reply to this post by Manish Sharma-5

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 “―gst-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:[hidden email]]
Sent: 2008年11月13日 16:57
To: [hidden email]
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

Manish Sharma-5

Re: Performance with gst-launch pipeline and playbin

Hi,

Thanks to all for replying back.

2008/11/14 Zhao, Halley [hidden email]
1. playbin will always link ffmpegcolorspace and videoscale into the pipeline, it will impact the performance compare to customized pipeline.

Hi Zhao,

I apologize for not mentioning this in advance. We are doing this testing on ARM platform. We have disabled ffmpegcolorspace and videoscale inside playbin code. so that our video pipeline should look similar to the one which I have mentioned in customized 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 }

One more behaviour I have observed while debugging with PowerTrace hardware that playbin creates 12 threads for the following command while similar specific pipeline creates 10 thread. What are these extra 2 threads created by playbin? Is there any clue on the same?

1) with playbin (12 threads)

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

2) with gst-launch specific pipeline (10 threads)

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 }

Regards,

Manish

2008/11/14 Zhao, Halley <[hidden email]>

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 "—gst-debug=STRING", next "gst-launch-0.10 –gst-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:[hidden email]]
Sent: 2008年11月13日 16:57
To: [hidden email]
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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Manish Sharma-5

Re: Performance with gst-launch pipeline and playbin

In reply to this post by Stefan Sauer

Thanks a lot Stefan

On Thu, Nov 13, 2008 at 9:12 PM, Stefan Kost <[hidden email]> wrote:

hi,

Manish Sharma schrieb:

> 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.
>
you can use "gst-launch -v ..." or you can use
GST_DEBUG_DUMP_DOT_DIR=<path> gst-launch ... and convert the generated
dot files to e.g. png with "dot"

Stefan

> Regards,
> Manish
>
> ------------------------------------------------------------------------
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> ------------------------------------------------------------------------
>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>

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