Some DVB-S channels work, others don't

[liteswap]

Although a GBPVR user for almost three years now, this is my first dip into digital - and I'm a bit stumped.

My question is: why would some digital (DVB-S) channels work fine, while others don't? Some channels seem to play - they show up in the tuner status as playing - and seem to overlay the TV Listings screen with an invisible layer, although there's no audio. Pressing Stop stops playing, and tuner status reverts to Sleeping.

I've done two or three channel scans, have compared by scan cache against some of the ones posted here, and the tuning parameters do match. I've also downloaded and installed all the latest patches posted by sub. I've even tried switching between renders - and of course I've searched the forum. Nothing seems to make a difference.

Tuner hardware is a Compro Videomate S350 - which does also display some oddities, such as tuning into a station fine using the TV Listings screen, but complaining of lack of signal when channel surfing via Live TV. I'm not sure if this is connected or a separate problem. I would appreciate some thoughts. Thanks.

PS: Have now tried it with other TV programmes, and the channels that GBPVR can't access work there - including ones that are reported as encrypted (eg E4) but which aren't...

[liteswap]

Any thoughts on this? I've since rescanned twice, and verified that the card CAN pick up the missing channels - but PVRX2 won't... Thanks for your patience.

[Pob]

Can you post your sateliite scan.cache file, with some examples of channels that do not work, so we can see any problems?
Remember that many of the channels like E4 and C4 appear twice in any scan - once for the Sky encrypted version, and once for the Freesat version. Also in the digital channel mapping screen, you need to ensure that on the left side all the stations are set to the corresponding channel names, not just a string of scan information. I say this because I have noticed that even after changing the scan.cache for a new one, old tuning information stays on the left side, which means you may not be actually using the correct tuning parameters from your new scan.cache. It should look like the picture attached.
What is your driver version for the Compro card?
I cannot scan in PVRX2 using the Compro S350 - it crashes.
I can scan using a Hauppage card, but that is in my main lounge media centre and is in use to often to play with!
I have been scanning in DVBDream using the GBPVR pid grabber, but it does generate different results to PVRX2 in that it does not put in any FEC values (usually 23 or 56) - however it still seems to work fine in PVRX2

[liteswap]

Thanks for the steer - I think you may have nailed the problem. I've had a hunt through the scan cache (attached) and found that indeed, following your advice with one channel (E4) has resulted in sound and picture.

I'll now work my way through the rest of them....pity the Config app doesn't give you a more user-friendly way of doing this than a small list box though.

Sub: any thoughts on how this process could be made easier in future - separate dialog box perhaps?
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