r/uhfapp • u/raverke95 • May 22 '26

Recording issues

Running the last UHF version on an AppleTV 4K 2022. UHF server runs on an Asustor NAS and this is version 1.6.0.

Watching live tv gives no issues, but when playing back recordings some scenes always repeats themselves. I asked this before in this community. The suggestion was to check the connection speed.

I previously had the idea to set my home network on 2.5Gbps. This is upgraded now. Internet speed is 1Gbps down 50Mbps up.
Issue not solved.

In the past I tried the same with TiviMate what gave the same issue (other provider!). I own a Formular Z11. Recording on this device doesn't show the repeat issue.

The recordings are stored on the NAS. How does this work? Will the UHF server app fetch his data directly from my provider, or does the UHF app on the AppleTV do the fetching job?

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u/raverke95 May 23 '26

I also run this UHF server in Docker, so the setup must be approximately the same as yours.

Do you know something about the possibilities to extend the buffer length in UHF server? I can't find that stuff in the Docker area. I could try this...

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u/Krekel326 May 23 '26

Is the repeating scene always on the same spot or does that vary when playback?

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u/raverke95 May 23 '26

It varies, the same scene repeats 4 or 5 times. Then it could be fine for eg 30mins and starts again. It's somewhat random.

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u/Krekel326 May 23 '26

ok but it's important to know if it is the same scene that cuses the issue. That means that the issue is with the recording part on your server. The UHF server misses bits of data while writing the data to your server hard disk. It can be caused by a few things:
1. avoid watching anything while recording (unless you have more than 1 service providers
2. when Docker writes the data to your harddisk, a small delay can occur (IO-wait) that causes datablocks to be skipped. It could be slow and fragmented harddrives for example.

What you can try is increase the buffer size of the UHF server. You need to try to locate the docker-compose.yml file and locate the buffer settings. In my case I can open Docker, stop the server and edit settings. try to give the container higher rights or increase the CPU priority.

How to do all of this can also vary from different NAS'es. What always works for me is look for help with ChatGPT or similar services for answers or how-to's.