Stuttering

[oxovi]

I use Open ATV on vu+ zero and assume that this is the code that is running there.

My satip client is stuttering a lot. Other clients do not experience this problem (e.g. VLC).

Does it make sense to increase buffering somehow?

[perexg]

What is your server? If you're using minisatip and latest satipclient, you can enable the TCP transport mode (add tcpdata=1 to the end of vtuner.conf). Example config:

0=desc:minisatip,ipaddr:192.168.100.237,tuner_type:DVB-S,uuid:11223344-9999-0000-b7ae-0022b7f0056e,vtuner_type:satip_client,tcpdata:1

[oxovi]

I use a Kathrein EXIP 414/E. I was not able to see if it supports TCP transport mode. It has nothing in the UI to enable it.
https://www.kathrein.de/en/sat/product/20510103/
Thanks for trying to help.

[perexg]

The TCP transport mode is not in the SAT>IP standard specification. I do not know if any official software in SAT>IP servers support this extension. The UDP protocol is unreliable, so if something is not tuned properly in the network stack, there might be some packet loss. The UDP buffer size is already set to 1MB in the satipclient code. I assume that your box is connected to the gigabit network, the SAT>IP through WIFI without TCP data transfer is really sub-optimal.

You may try to tune net.core.rmem_max kernel parameter (sysctl net.core.rmem_max), if it helps.

[oxovi]

Thanks for the explanation. This is very interesting and rests my case.
I will play around with net.core.rmem_max and report back.
Unfortunately I need to use WiFi (5GHz) and I have tuned that as much as possible.

[perexg]

BTW: There is also another way to improve your setup. If you have a linux server connected directly to your SAT>IP server box, you may install minisatip server and use it as proxy for your enigma2 box (so Kathrein -> gigabit network UDP -> minisatip -> wifi TCP -> enigma2). The minisatip can be used also as a SAT>IP client - --satip-servers option. https://github.com/catalinii/minisatip

[oxovi]

That is actually a real option. Thanks :-). I will see if a RPI3 can do the job.

[DocSnyd3r]

Hi works for me too. Raspberry 2 about 40% CPU when I stream 2 HD channel with TCP.

[DocSnyd3r]

Well still problems changed sysctl -w net.core.rmem_max=212992 coming from 163840. Running an VU+ zero 4k image...

[estimadarocha]

@perexg you still use sat>ip client on enigma? does it still work good with vtuner_type:satip_client,tcpdata:1 and optimized kernel parameters?

[perexg]

Yes, I don't have any problems with this configuration.

[estimadarocha]

@perexg sorry to ask again... i am running sat>ip client on a gbue4k pushing from satipaxe and using sat>ip vtuner i am always seeing buffered on satipaxe. if i use wget pushing from same device to same stb it don't buffer! any idea?