Jerky live TV on version 31

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pinnerite
Senior
Posts: 151
Joined: Mon Apr 07, 2014 2:34 pm
Great Britain

Jerky live TV on version 31

Post by pinnerite » Tue Mar 23, 2021 7:08 pm

I have been slowly eliminating problems on my backend server.
I am left with jerkiness of the live TV on my remote frontend but not on the local frontend.

The remote has always been cable connected to the modem-router but the backend server was connected by WI-FI.

Suspecting the WI-FI, I disabled it and connected a cable to the backend server from the modem-router.

The remote frontend has been running it all day.

HD recordings replay perfectly on both the server's frontend and the remote.

Live TV runs fine on the server's frontend but on the remote, it is jerky.

Both machines are powered by Linux Mint 20.04 and both have 2TB drives with at least 1TB free.

Is this fixable?

pinnerite
Senior
Posts: 151
Joined: Mon Apr 07, 2014 2:34 pm
Great Britain

Re: Jerky live TV on version 31

Post by pinnerite » Thu Apr 01, 2021 7:40 pm

I have narrowed the problem down a little:

a) Viewing SD and HD recordings on MythTV backend server 's frontend - Perfect
b) Viewing live SD and HD TV on the same frontend - Perfect
c) Viewing SD and HD recordings on remote (connected by wi-fi) - Perfect
d) Viewing live SD TV on remote frontend (connected by wi-fi) - Perfect
e) Viewing live HD TV on remote frontend (connected by wi-fi) - Jerky

a contributor on the uk.tech.digital-tv usenet group wondered if this is CODEC issue as HD uses H264 whereas SD doesn't.

Is he on the right track?

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kmdewaal
Developer
Posts: 288
Joined: Wed Dec 07, 2016 8:01 pm
Netherlands

Re: Jerky live TV on version 31

Post by kmdewaal » Thu Apr 01, 2021 9:20 pm

The HD in statements c) and e) will both have H264 and will have the same bandwidth requirements.
Statement c) shows that your average wifi bandwidth is enough for HD with enough buffering available.
Statement e) the jerky HD can be caused by lack of buffering, i.e. being "too close to live".
It could just be that your live HD via wifi will be OK when, to allow for a buffer, you first pause e.g. 5 or 10 seconds and then continue playing.

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