Can you tell that I am about to launch into some serious production and encoding projects over here?! I know this bores many of my readers out of their minds, but Mark, you probably need the info, and I need to keep track of this as a reference guide.
This article, by Jesse David Hollington over at iLounge, is very informative and a tad lengthy. I am including a few charts from the article here in this post in case their archive doesn't last long. Jesse does an excellent job of illustrating aspect ratios visually and provides data for the video iPod, AppleTV, and iPhone. He also presents detailed information about resolution, bit rate, file size, anamorphic encoding, and then offers some recommended resolutions settings for typical content formats. As the number of formats is growing, this article is very helpful! The link to the article as at the bottom of this post.
... Even today, however, the video formats supported by the iPod, Apple TV, and iPhone are relatively limited compared to the number of formats available on the market. This means that just about any content that you want to view on these devices is going to require some type of conversion process. The advent of these new devices has complicated the landscape even further, since more options are now available for both the viewing and encoding of videos, but with these changes come more considerations about how to encode video for the best possible viewing experience. ...
Source: The Complete Guide to iPod, Apple TV and iPhone Video Formats | iLounge
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