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Comment: Further clarifications.

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On this panel you can adjust various settings that control the way that MediaPortal TV Server handles the DVB EPG.

General

Always try to fill holes

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If this option is not checked, MediaPortal will store the new information from the broadcast datastream only if the EPG for that time slot is empty.  This occurs when the broadcaster adds another day's the EPG for the day that is 7 or 14 days in the future.

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Some broadcasters supply on one transponder the EPG for all of their channels, and don't supply the EPG at all on their other transponders (or possibly supply only a limited EPG on their other transponders).  This option controls whether the EPG grabber will grab all of the available EPG, or only the EPG for the channels on that transponderthe transponder being used to receive the EPG.

Note: the term transponder is used for satellite channels to refer to the signal broadcast on a single frequency.  With digital signals, this single frequency can carry a whole set of separate TV and radio channels.

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If this option is checked, MediaPortal will grab the EPG when you watch or record TV, or when you listen to (or record) a radio channel; MediaPortal will not grab the EPG when the tuners are idle.

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Some care is needed in selecting channels on the "TV EPG Grabber" and "Radio EPG Grabber" panels.  You might think that you need to select all of the TV and radio channels listed on those panels, but in some countries this is not recommended as it will result in MediaPortal grabbing an optimal choice due to the way that the broadcaster transmits the EPG.  If you select all channels, you may find that MediaPortal grabs the entire EPG every time that you change channel or a recording starts. 

I f you watch or record TV or radio only occasionally, the EPG will become progressively more out of date, and may not contain the required programme information when you want to schedule a recording.  If this is your situation, you may prefer to use the EPG grabbing while idle option instead.

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This specifies the number of minutes that MediaPortal will spend grabbing the EPG when you start watching or recording a channel.  The time required to receive a full EPG depends on the size of the broadcast EPG, and this varies from country to country.  A value in the range of 2 minutes to 10 15 minutes is suggested. 

Note that after the EPG has been grabbed, MediaPortal spends further time updating the database with the programme information.  Depending on the size of the EPG and the speed of your hard disk, the database-update phase can take as long or longer than the EPG-grabbing phase.  The value for Timeout does not include the time spent updating the database.

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If this option is checked, MediaPortal will grab the EPG only when all tuners are idle; .  MediaPortal will not grab the EPG when you watch or record TV or radio.

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  • Some broadcasters transmit the entire EPG in every MUX (that is, each MUX carries the EPG for itself, plus the EPG for all of the other MUXes).  In this case you need to select only one channel on the "TV EPG Grabber" panel, and no channels on the "Radio EPG Grabber" panel.  Choose a channel that has good signal strength, good signal quality, and which broadcasts 24 hours per day; don't choose a part-time channel.  Remember You also need to deselect use the following settings:
    • Deselect Grab EPG only for channels on the same transponder
    setting.
    • on the "DVB EPG" panel.
    • Deselect Store data only for selected channels on the "TV EPG Grabber" panel.
    • Deselect Store data only for selected channels on the "Radio EPG Grabber" panel.
  • Some broadcasters transmit in each MUX only the EPG for the channels in that MUX.  In this case you need to select one channel from each MUX on the "TV EPG Grabber" panel, and no channels on the "Radio EPG Grabber" panel.  You also need to use the additional settings listed in the previous bullet.
  • Don't make the mistake of selecting every channel that you want to watch.  If you do this, MediaPortal will Depending on how your broadcaster transmits the EPG, selecting every channel may cause MediaPortal to grab the entire EPG from the first channel, then grab the entire EPG (again) from the second channel, and then again from the third channel, and so on.  MediaPortal needs to grab the EPG only once during each refresh cycle (see below).

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This specifies the number of minutes that MediaPortal will spend grabbing the EPG when the tuners are idle.  The time required to receive a full EPG depends on the size of the broadcast EPG.  A value in the range 2 minutes to 10 15 minutes is suggested.  The Timeout value does not include the time that MediaPortal spends updating the database.

Refresh every

This specifies how often MediaPortal will refresh the EPG.  The time is the shortest interval between successive EPG grabs, but the interval will be longer if the HTPC is busy recording or you are watching TV or listening to the radio.  Recording, watching TV, and listening to the radio always take precedence over grabbing the EPG. 

If you use the TV or radio a lot, you may notice that the HTPC seems to continue running after you try to put it to sleep.  This happens because the EPG is overdue for a grab, and so the EPG grab occurs when you put the HTPC to sleep (assuming that it is not recording).  When the EPG grab is complete, the HTPC will sleep.

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