You can render out sequential animation frames or QuickTime or .avi files from Blender (or other 3D Applications) for use in a high-definition (HD) project. There are several factors you need to take into consideration.

The first is resolution. There are several flavors of HD. HD is actually a family of formats, the most popular being 720p (for progressive) and 1080i (for interlaced). The 720 refers to the height in pixels. The dimensions of this format are 1280 wide by 720 high. 1080i images then are 1920  pixels wide and 1080 pixels high.

The big thing to keep in mind before ¥ou embark on an HD project is knowing you will have the storage capacity to render and then encode such large files. You must bring your rendered frames or movies from your 3D package into a video encoder that can play back for your intended device. Some HD playback devices require transport stream encoded files, while others require slightly different formats. Be sure you have the codecs necessary to encode your file for playback in the delivery device before you start your project!