I have the Hauppauge Nova-T-500, and generally, I have to say that it is very good. However, I have noticed some slight blurring, namely when credits are scrolling across the screen at the end of a program, and you can't quite read them. With a bog-standard £15 digibox, this doesn't happen - is there any reason why the Hauppauge card might be doing this? I'm using an Nvidia 7100GS graphics card.
Its probably the Nova T... There are so many options, it can be hard to troubleshoot this, but it not uncommon! Are you using deinterlacing? If so, what settings as I found that the suggested tvtime ones cause this, and changing one setting can get rid of a lot of the stutter.
Also, be aware of you refresh rates - display vs the TV standard. Guessing you are in the UK, so 50Hz for your TV, if your display is set to 60Hz, then there is the potential for strobing effects that would appear like this as well.
Thanks for your reply.
I had really bad jerkiness to begin with, using the "Bob" deinterlacing, but after disabling deinterlacing completely, it looked much better (I'm using PAL-I with a CRT TV via S-Video). Maybe it would be worth experimenting with other deinterlacing options.
The blurring that I mentioned really isn't THAT bad, but it can be quite noticeable when the credits are scrolling across or up the screen. I never thought of changing the refresh rate, I will try this. I understand PAL-I (which is what I chose in the LinuxMCE setup screen) gives rise to a 50Hz refresh rate - am I changing the TV setup itself to match this, or should I be changing the refresh rate in LinuxMCE to match the TV?