What is the cause of this blocking ?

scottb721 · **19th June 2008, 12:15 AM**

Some shows have severe mpg blocking, examples below, and I'm wondering if it's the source ie tv station or something in my set up. I took 2 pics with my camera last weekend while watching a show about the Olympics. When a show has water splashing, bright lights , large crowds of people and also when watching football the problem shows up. Most other stuff, graphics, ads etc is fine.
I liken it to when mpgs are encoded at too low of a bitrate and action scenes get blocky.

I'm using a nVidia 6200 video card and running Purevideo decoder. DVI to HDMI on my Toshy LCD. I am using a little desktop scaling by nVidia control panel due to the tv's overscan on the HDMI port. I've also got nVidia set to output 720P.

I'm not sure if it's something in my set up or just the way dig TV is.
Thoughts ?

Thanks
Example 1
Example 2

vlad · **19th June 2008, 12:26 AM**

1. I found that PowerDVD is the best with MCE 2005.
2. Do you have ffdshow installed and configured to do mpeg1/2?
3. 6200 - a bit underpowered IMO. I had 6600 and was not happy. But anyway, 1 and 2 are more valid.

scottb721 · **20th June 2008, 03:11 PM**

If it's something in my system why does it only do it with some parts of some shows rather than be constantly bad. The incoming bitrate would be fairly consistent I'd image regardless of what's happening on screen. Noticed another thing displaying badly - tickertape parades with all of the paper floating everywhere.
I'd also expect to see it in DVDs if it's a decoding issue, at least I think I would.

logifuse · **20th June 2008, 04:18 PM**

Blocking is par for the course with channel 7 - they seem to be able to so much less with the same amount of bandwidth as the others.

Justin

Wraak · **20th June 2008, 09:31 PM**

Nothing to do with your 6200. Have been running that card for almost 2 years without a glitch. Unless it's broken. What driver are u using?

scottb721 · **20th June 2008, 10:01 PM**

Quote:

Originally Posted by Wraak

Nothing to do with your 6200. Have been running that card for almost 2 years without a glitch. Unless it's broken. What driver are u using?

175.16
I was using a 5500 for 18mths and apart from a sync problem that nvidia solved with 163.71 it was pretty good.
In May I finally did a reinstall, moved up to 175 and a few weeks ago I moved up to a fanless 6200.
Perhaps I might give 163 a run but I'd be surprised if that made any changes.