Constant stuttering on Win7, but not on XP.

[clashcityrocker]

I have a TBS 6981 DVB-S2 with the latest drivers, using the latest version of DVBViewer Pro (bought today).

 

I get constant stuttering when I try and watch anything. I don't believe it's system spec (Quadcore Q8300 2.5Ghz, 4GB RAM).

 

Done a clean install of Windows XP - NO STUTTERING

Done a clean install of Windows 7 32bit - STUTTERING.

 

Tried various MPEG2 decoders, no change, tried different PCI-E slots for the card (but I am assuming that because it work in XP and not 7, it rules out hardware things like PCI-E slot, signal, IRQ things..).

 

I did have a SSD, and thought that might be the problem, bit cloning the drive to a normal HDD, NO CHANGE.

 

I am only using one imput on the card (Channel A).

 

Anyone know how I can debug this further? I don't know of it's a problem with the TBS drivers, Windows 7, or DVBViewer...

 

EDIT: Found this:

 

 

The discontinuties count keeps rising and rising.. Is this related?

Edited February 25, 2012 by clashcityrocker

[McenterFreak]

I think you need to look at your dish, or cabeling. If you have tried a clean win 7 installation, witouth any "codec packs" it should work.

The funny thing is that it works in XP, but not in Win 7, it should be opposite, because XP has no decoders, and Win 7 have. What dedoders do you use in XP?

[clashcityrocker]

I installed Cyberlink DVD Suite7, which I had kicking around, and that had MPEG2, MPEG4 and VC1 decoders. I used this under both 7 and XP. (I tried initially with a totally clean Windows 7 without codec pack, and it made no difference, the codec pack was something I did subsequently to see if it improved matters).

 

I tried all sorts of decoder and rendering settings on Windows 7, it made no difference whatsoever.

 

My understanding (and correct me if I am wrong), is the decoding occurs after the DVBSource, which is where the disconnections occur.

 

It's extremely repeatable here, I have been running the same setup from the XP HDD for 2 hours this morning under XP, on the same channel, with the same settings and it's showing 80% signal strength and not a single disconnection. The queued buffers are also sat at 0 on XP (they were also all over the place under Windows 7).

 

 

I don't believe a cabling or dish alignment problem would manifest itself like this (i.e. work perfectly all time in XP, but never in W7, with identical problem in my original and grubby x64 Win7, and the freshly installed 32bit Win7)

 

Could it be down to the quality of the drivers for the sat card? I'm going to borrow a different brand of card, see if it makes a difference. Any other tips? (I disabled C1 "idle" in the BIOS, as there were some reports of that causing problems, but made no difference here).

 

My Motherboard is a Asus P5B, latest BIOS, and reset to default CMOS settings, I also tried different slots for the card, but as I mentioned, it works under XP, so it's unlikely to be that. Running out of ideas...

Edited February 26, 2012 by clashcityrocker

[Benarty]

You should support a support.zip in this case.

 

SD should be no problem , runs even on very slow computers, HD can be a problem if no video acceleration, dxva or Cuda can be used.

Even a fast processor has trouble to decode the video entirely on it's own and sure cause it has to deal with other software and windows apps.

[clashcityrocker]

Picked up a hauppage pci card, everything works fine in win7. Putting this down to a rubbish card or bad drivers, or something up with my pci express bus speeds.

[EnzoF1]

I just liked to comment on this one, as I have the same card and had a similar issue. I have two Technisat SkyStar HD2 cards, which worked just fine in XP and Win7. I added the TBS 6981 Dual-tuner to get a total of 4 tuners, however, the latter would constantly break up. Eventually I gathered that the TBS is completely anal about signal quality. Apparently a quality of 60% already made it fail where the Skystar HD2 had no issues at all, so this has nothing to do with signal strength. If anyone else ever encounters a similar issue, please re-align your dish, because it's definitely related to poor signal quality.