These can be an appropriate choice for video that is targeted exclusively for viewing on a computer. Microsoft have also recently introduced their Windows Media Format, which is a deliberately low quality, low data-rate format designed specifically for Internet use. There is a fundamental difference between the DV and MPEG styles of compression, which affects the editing process. This enables MPEG to achieve its much more efficient compression, but means the editing process is more complex for a computer to handle. It can also make the editor software sluggish to respond because of the amount of intense computing required.
Images only have to be re-computed where transitions, special effects, etc. are used.
Even better is to also save a DV copy as an archive in case subsequent changes are needed. They are appropriate if little or no editing is required. The main advantage is that they save the time required to generate the resulting MPEG file, which can be a slow process even on the latest fast processors. Inc. All rights reserved.