How many queues are needed for a muxer and tee

[Zhao, Halley]

Hi all:

I have some questions when I tune some camera pipeline.

In general, more queues, more latency of preview. Lack of queue will lead to jitter and a/v sync issue.

 

So I came to the conclusion that:

If you have a tee element, you need 2 queues at each branch.

If you have a mux element, you need at least 1 queue at one input branch.

Do you agree it?

 

And it seems one queue at each branch before a mux is better than just one queue at one branch.

 

gst-launch v4l2src ! video/x-raw-yuv ! tee name=t_vid ! queue ! xvimagesink t_vid. ! queue ! ffmpegcolorspace ! theoraenc ! queue ! mux. autoaudiosrc ! audioconvert ! vorbisenc ! queue ! mux. oggmux name=mux ! filesink location=test.ogg

 

ZHAO, Halley (Aihua)

Email: halley.zhao<a href="BLOCKED::mailto:[e-mail]" title="mailto:[e-mail]&#10;mailto:[e-mail]">@intel.com

Tel: [phone]

iNet: 8821-6476

SSG/OTC/Moblin 3W038 Pole: F4

 

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[Shivaprasad P]

Hi,

 

            Can anybody give me the reference for code/document on selector element in playbin2 ?

 

Regards

Shivaprasad

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[Florent THIERY-2]

Hi,

> So I came to the conclusion that:
> If you have a tee element, you need 2 queues at each branch.
> If you have a mux element, you need at least 1 queue at one input branch.
>
> Do you agree it?
> And it seems one queue at each branch before a mux is better than just one
> queue at one branch.

I also came to this conclusion, based solely on usage.

Florent

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[Miron Kunz]

Hi,

what about "leaky" and other properties of these queues? Have you used default values?

Thanks,
Miron

> Hi,
>
> > So I came to the conclusion that:
> > If you have a tee element, you need 2 queues at each branch.
> > If you have a mux element, you need at least 1 queue at one input branch.
> >
> > Do you agree it?
> > And it seems one queue at each branch before a mux is better than just one
> > queue at one branch.
>
> I also came to this conclusion, based solely on usage.
>
> Florent
>
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> The Planet: dedicated and managed hosting, cloud storage, colocation
> Stay online with enterprise data centers and the best network in the business
> Choose flexible plans and management services without long-term contracts
> Personal 24x7 support from experience hosting pros just a phone call away.
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> gstreamer-devel mailing list
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> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
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