Intermittent chronic stuttering on clients live tv (1 Viewer)

mm1352000

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    Hello again

    First, some answers/responses to previous questions/comments about scanning, though as far as I'm concerned they're almost irrelevant to the stuttering issue...

    Question, every time I re-scan I tick 'Enable Channel Movement Detection'. I assume now that this tick is for making the scan quicker and not, as I thought, a setting to track and amend if necessary channel tuning changes automatically in the background.
    Your assumption is wrong.

    The "enable channel movement detection" option is meant to prevent a new channel being created in the case where that channel has moved from one frequency to another. Update instead of create. That is all.

    Scan speed has nothing to do with channel movement detection. Enabling channel movement detection will not make the scan quicker.

    So is there a way of auto background re-scanning channels, or will I have to do a manual channel scan every so often to A) find new channels and B) prevent errors like the above?
    can mediaportal do channel movement detection checks in the background and auto retune when a change is found?
    TV Server does not do any automatic background tuning detail updates.
    Yes, you will have to do a manual scan every so often.

    I've unticked the channels "bid", "price-drop", "Sky News Active iText Quad" and "CNN" channels to stop the continuous epg grabbing. Begs the question though, how to stop it in the future?
    You can just check the TVService log, which is what I did. It is pretty obvious. Search for "EpgCard: grab epg on card" repeating often with the same channel over and over again, and the EPG grab process not able to get any EPG.

    I dont know what the problem is with the TV Codecs settings, as far as I was aware they are set as advised ( see screengrab ), what should I do?
    The LAV codecs are MP's default/preferred codecs. When you first visit the TV/video/Blu-Ray/DVD codecs sections they'll show as selected (as seen in your screengrab) if they're installed. However, the settings are not actually saved until you have visited the section. In other words, the TV codec settings were not saved until you took the screengrab. Now they should be saved and there is nothing further to do.

    As for the stuttering, this was fixed I think with a re-scan. Again though, how can I prevent an unknown channel tuning change from affecting my system...
    Quite honestly I think that if a rescan solved the problem for you it was nothing short of a miracle. There was and still is no evidence that tuning details had changed and that a rescan was required. The log messages that Vasilich spotted related to the EPG grabber and were irrelevant to the stuttering, so please forget about them.

    The point I was trying to make previously (and trying to make again now) is to get you to check that the frequencies that have been submitted for your region are correct.

    If the submitted frequencies are correct then a single scan should find all available channels and all of those channels should work perfectly.
    If the submitted frequencies are not correct then a million scans won't guarantee to find all available channels or that the channels which are found would work perfectly.

    We need to be logical and methodical.

    If we can establish that the submitted frequencies are correct then we can confirm that the channels found in the scan were saved with the correct details.
    If the channels have been saved correctly then we can start to look at external causes for stuttering like signal strength/quality etc.


    ...and so that is my advice to you: start by checking that the frequencies that TV Server is scanning are the correct frequencies for your region. Don't assume they're correct. They've been submitted by somebody who may or may not live in your region. People also make mistakes sometimes...

    Regards,
    mm
     

    ben1210

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    MM, Thanks for such an informative answer. Its really appreciated.

    Here are the three channels tuning detail from my server in question that all do the same - slowly load, with no picture and stuttering sound.

    I dont know how/where to check if the tuning details are ok. Its the UK Hannington transmitter.

    Problem seems to affect only the DVB T card as all channels tried with DVD S card are fine

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    ben1210

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    Very irritatingly and yet great, I just came back from work and all channels are fine. I haven't done anything to the system since this morning, when it still was missbehaving.
     

    mm1352000

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    Very irritatingly and yet great, I just came back from work and all channels are fine. I haven't done anything to the system since this morning, when it still was missbehaving.
    Right, yet another reason to believe that out-of-date/incorrect tuning details have little or nothing to do with this problem.

    What was the weather like in the morning as compared with when you got back from work?
     

    mm1352000

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    ben1210

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    :) You know what, it was foggy in the morning and clear/sunny when I came back............
     

    mm1352000

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    :) You know what, it was foggy in the morning and clear/sunny when I came back............
    Excellent. So, there's potential for [weather effects => poor signal strength/quality] being the explanation.
    My recommendation at this point would be to keep an eye on the issue, noting the weather conditions when you have issues. If the problem is indeed weather related then we might expect problems to only show when weather conditions aren't great (windy, heavy rain, dense fog etc.)...
     

    ben1210

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    I will keep a eye on the weather.

    I did think of another theory, tonight when I came in I looked at my server and moved the cables a bit, after which I went upstairs and TVs were fine. To be honest its a mess of cables around the server (which houses the TV cards and all the HDDs). Any chance of interference from this server and the cables?
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    mm1352000

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    I did think of another theory, tonight when I came in I looked at my server and moved the cables a bit, after which I went upstairs and TVs were fine. To be honest its a mess of cables around the server (which houses the TV cards and all the HDDs). Any chance of interference from this server and the cables?
    Wow, that's a fair bird's nest. :D

    Yeah, interference problems are possible with anything from nearby cabling to electric fences to microwaves to electrical devices that draw high current. If you moved the aerial cables, it is also possible that you have a bad termination on the cable path coming from the aerial.

    In general there are many questions like that which you could be thinking about. For example...

    What type of aerial do you have (outdoor metal spikey thing, flat panel, or bunny ears)?
    Where is the aerial located (on the roof/wall etc. external, in the attic etc. internal, or other)?
    How far is your house from the Hannington transmitter?
    What is the land like around you (hilly, are you in a valley etc.)?
    How far by-the-cable is the aerial from your PC?
    What grade of cabling (eg. RG-6, RG-59) is running from the aerial to your server? [Brand and grade is usually printed on the outside of the cable insulation.]
    How many splits in the aerial cable?
    How many splits are not connected?
    Do you have an aerial amplifier in the system?

    The list goes on...
     

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