best way to 'relay' a stream between processes

[Eslam Ahmed]

Noted. Thanks!

Best Regards,
Eslam Ahmed


On Thu, Sep 30, 2021 at 11:12 AM Eslam Ahmed <eslam.ahmed at avidbeam.com>
wrote:

> !!
>
> Best Regards,
> Eslam Ahmed
>
>
> ---------- Forwarded message ---------
> From: Marianna Smidth Buschle <msb at qtec.com>
> Date: Thu, Sep 30, 2021 at 11:05 AM
> Subject: Re: best way to 'relay' a stream between processes
> To: Eslam Ahmed <eslam.ahmed at avidbeam.com>, Discussion of the development
> of and with GStreamer <gstreamer-devel at lists.freedesktop.org>
> Cc: Marc <Marc at f1-outsourcing.eu>
>
>
> I wasn't the one actually doing the tests (was on maternity leave) so I
> can't give you any numbers.
>
>
> I was told it was definitely too much for us, but it should also be noted
> that we are talking about big amounts of data (RAW or H264 high bitrate
> fullHD at 30fps x6) and multiple pipelines.
>
> So it was really good to take advantage of ref counting instead of copying
> when we could.
>
>
> We also had issues when 2 processes where receiving H264 MPEGTS (20Mbps)
> through RTP on a local network. Something with the Linux buffers and packet
> duplication.
>
>
> On 30.09.2021 10.51, Eslam Ahmed wrote:
>
> Marianna,
>
> How much of an overhead are we talking about here regarding udpsrc/sink?
> How much worse would you think it would be when using
> tcpserversink/tcpclientsrc?
>
> Best Regards,
> Eslam Ahmed
>
>
> On Thu, Sep 30, 2021 at 10:45 AM Marianna Smidth Buschle via
> gstreamer-devel <gstreamer-devel at lists.freedesktop.org> wrote:
>
>>
>> > Hi Eslam, thanks that was indeed what I was expecting. However from
>> these examples and this fdin I should assume I can not use this option with
>> gst-launch not? Or can I work around this with something like mkfifo?
>>
>> If you use python and 'Gst.parse_launch("")' then it is just as easy and
>> fast as using 'gst-launch'
>>
>>
>> Also I think we have tried something similar at some point using
>> fdsink/src but I don't think I have the code anymore
>>
>>
>> I have also come across this at some point:
>>
>> https://mazdermind.wordpress.com/2014/08/29/getting-shmsinkshmsrc-to-work-with-videomixer/
>> but haven't tried myself
>>
>>
>> We have also looked at how to best split pipelines between or within
>> processes.
>>
>> We have also tried like you to use udpsrc/sink to relay data but found
>> that the overhead was too big even within localhost.
>>
>> In the end we decided to keep things inside the same process but to
>> decouple the pipelines internally just to avoid errors in one breaking
>> the other ones and generally to ease debugging.
>>
>> For that purpose we are now currently using interpipesrc/sink (from
>> RidgeRun) but have also looked at proxysrc/sink and intervideosrc/sink.
>>
>> --
>> Best regards / Med venlig hilsen
>> “Marianna Smidth Buschle”
>>
>> --
> Best regards / Med venlig hilsen
> “Marianna Smidth Buschle”
>
>
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