Apple is giving vloggers a few hints on how to optimize their videos for iTunes so that a single format will look ok on both an iPod as well as the new Apple TV, which is probably connected to a large screen HDTV.
- Encode at 640×480 or 640×360. This will look much better than 320×240 on HDTV, and will still port to the iPod. While 720p looks great, they say, it won’t work on an iPod.
- Don’t make two formats for different resolutions – it dilutes the popularity of the podcast and reduces exposure in charts.
- Don’t add letterboxing to make videos to a 4:3 aspect ratio. Leave them at 16:9.
See the original email here.