Horrible Red Blockiness - Vegas 7.0d

M

Metrolens

Well-known member
On red colors, I am noticing a heinous amount of mosaic blockiness in Vegas 7.0d, in the preview window. It was bad on my old Dell CRT monitor, and I just lived with it. But it's become absolutely atrocious on a brand new LCD (1900x1200, DVI connection). I mean the pixel blocks are around 10x10 pixels. I am vieweing at full resolution at the Best setting.

What gives? The original footage is SD, 16x9, 30F, Canon A1 footage. The problem isn't visible on the original footage viewed on a regular CRT television. Nor is it visible in my captured footage viewed on an NTSC studio monitor via firewire and S-Video linkup.

So why does my Vegas preview have so much trouble displaying these glowing reds? Especially on an LCD, but also on my old Dell CRT monitor?
 
A standard NTSC TV/monitor won't show that blockiness because it's analog, not digital. And it's also much, much, much lower resolution.
 
But is this to be expected? Literally 10x10 pixel blocks??? Here's a grab:
1194972220.jpg

How do I apply a Chroma blur to horizontal pixels? Do you mean applying it in the timeline to all the footage, then rendering? This seems to be an annoying solution (no offense intended).

I've seen a similar effect on DVDs I've made, with the same Canon 30F 16x9 footage. I capture and edit, then export DVD files from Vegas, author in Adobe Encore. Watching the final DVD on a regular NTSC monitor looks pretty good (there is a hint of weirdness in the glowing reds on that NTSC TV) - but on my friend's LCD HDTV it looked awful - all blocky. Am I doing something obviously wrong?

Does everyone just live with these apparent LCD / DVI / DV red blockiness problems?
 
Reds in DV have always been problematic. I don't have enough experience with Canon's DV version of 30F to know if it's introducing something that exacerbates the problem, but while I'd expect trouble with that image even in the best of DV, it does seem a bit excessive.

You apply a horizontal Chroma Blur by going into the dialog box and setting the Vertical to 0 and the Horizontal to . . . something other than 0.
 
Thanks David and uh, Horse. That chroma blur works like a charm. Horizontal values between 1 and 2 are really sufficient to clear it up.

So is the full fix to just apply it to offending clips while editing - (does this even require a render?) - and then remove the chroma blur before rendering final DVD files for output? Or would leaving the chroma blur applied actually be a good way to insure the DVD problem I described above doesn't happen on some unknown LCD while they're watching a DVD I've made for them?

Also, is now a good time to ask, very briefly, what exactly is chroma?
 
Ok - meaning that if I don't leave the chroma blur in place for my final DVD files, any blocky clips I saw while editing will be blocky on DVDs played back on some LCD TV?

I did notice on my NTSC monitor that the chroma blur gave the image a subtle loss of detail and contrast. To be expected? Are there any other notable negatives to using a chroma blur? Btw I didn't render the chroma blurred clip, just used real-time preview (which even at Best setting looks worse than a true render, no?)

Also at the highest values of 3 to 4 I noticed a strange "halo" effect around the outside edge. I guess I should use the lowest value chroma blur possible, so as not to overdo it.
 
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