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Re: 1px black added to bottom of MPEG-2 ???

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Re: 1px black added to bottom of MPEG-2 ???
by Andy DeVries on Apr 3, 2009 at 12:47:35 am

Hi Chris, thanks for writing.

I don't think DG requires a test anymore but I do specifically request it now, largely in part to this issue. And they do tell me that all is well. But I definitely still see it as cause for concern since, at least prior to my tests, it was unclear where that black was coming from and how it was affecting the dimensions and field order of my interlaced NTSC video.

For instance, if it was shifting the video up, even if that black line was out of action safe, there may be some other pixels further up that are now IN action safe after being shifted up a few pixels. But my biggest concern was fields and improper scaling due to any horizontal "squishing" - I mean if my source video is 720x486 and there's a 2 pixel black bar added to the bottom, then where'd my other pixels go???

But DG claims all is well and my test indicates that the black bar is going OVER existing video which is better than any alternative. Still freaking bizarre and not cool.

I think I will post the specs sometime here and hope that someone would be willing to try them for themselves.




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