Audio

• Most iPods can play the same popular audio formats, including MP3, uncompressed WAV files, AAC, Audible, and AIFF files.
  
  

Fifth Generation

• Fifth generation iPods can play most popular video formats, including H.264 and MPEG-4 video in .mov, .m4v, and .mp4 file formats.
  
  

Images

• Most iPods allow you to view popular image formats like JPEG, TIFF, GIF, BMP, and PSD (Photoshop). IPod minis, shuffles, and monochrome displayed iPods do not display images.
  
  

Conversion

• ITunes converts unsupported video and audio formats to make them playable be on an iPod. After conversion, the song will appear in its original and converted format.
  
  

iPod Shufle

• The iPod shuffle can play almost every audio file that you can play in iTunes. if you want to play higher bitrate songs, you will need to convert them to 128 kbps AAC format.