It supports MP4 natively for video, for audio it support MP3 and ATRAC, AVI is not supported. Windows media video WMV is supported though also.
By using PSPvideo9 software you can change any format to MP4s matching the PSP screen and resolution.
You can save and play movies/videos on your PSP® (PlayStation®Portable) system in the following file formats:
* MP4
o MPEG-4 Simple Profile (AAC)
o H.264/MPEG-4 AVC Main Profile (CABAC) (AAC) and Baseline Profile (AAC)
UMD™ Videos Back to top
You can also play UMD™ (Universal Media Disc) Video discs on your PSP®.
onverting Movie / Video files Back to top
If the Movie / Video files you want to view are in a format that is not supported by your PSP®, you may be able to convert them into a compatible format with the following programs:
* Media Manager for PSP®
* Sony Image Converter 2
PSP® compatible music/audio formats Back to top
You can save and play music/audio on your PSP® (PlayStation® Portable) system in the following file formats:
* MP3
* MP4
* ATRAC3plus™
* ATRAC3™
* WAV
* WMA