3GP is a multimedia container format that supports MPEG-2, H.263 and H.264 video codecs. 3GP was designed to decrease storage and bandwidth requirements in order to accommodate mobile phones. Most 3G capable mobile phones support the playback and recording of video in 3GP format (memory, maximum file size for playback and recording, and resolution limits exist and vary).
Windows Media Video, or WMV, is Microsoft’s family of video codecs including WMV 7, WMV 8, and WMV 9. It can handle anything from low resolution video for dial-up Internet users to HDTV. The latest generation of WMV, based on the WMV 9 codec, has been standardized and approved as a new and more open codec known as VC-1. While all versions of WMV support variable bit rate, average bit rate, and constant bit rate, WMV 9 introduced several important features including native support for interlaced video, non-square pixels, and frame interpolation.
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