jsteffe wrote:This summer I'm going to make a number of DVD and possibly Blu-ray frame grabs for a book. I think it's time to create a separate thread just to deal with technical issues regarding screen grabs, which people can use for general discussion and as a technical reference.
The best thing you can do to make sure you're getting the whole picture (literally) is to take a screen grab of a resolution test chart. The Spears & Munsil BD test disc has one - or you can get the FREE
AVSHD test patterns which do a similar job. (On the S&M disc, the chart you're looking for is
"Luma Multiburst", on AVSHD the "Sharpness and Overscan" pattern has an area which fulfils the same purpose).
The tiny fine lines should appear as individual pixel-thin lines in both the horizontal and vertical directions. If DVD Beaver were to take a screen grab of this test pattern using whatever process they're using right now, it would appear smudged into a less distinct grey tone.
Give me a private message any time if you're having troubles/have doubts.