Technical Requirements

Last Updated: 07/29/2014

Overview

Please refer to Apple’s document, “Creating Content for iPod + iTunes,” for detailed information regarding content creation, file formats, metadata, and available tools. CU Boulder reserves the right of refusal for any content. The submitter will be notified if content does not meet the guidelines set forth for content, quality, or formatting, and appropriateness, and will be responsible for modification and resubmission. CU-Boulder iTunes U content may be embedded with artwork provided by the University Communications.

Supported Formats

Summary:

Audio – AAC or MP3 (.m4a or .mp3)
Video – MPEG-4 with H.264 encoding (.mp4, .m4v, or .mov)
Size: 640 x 480
NOTE: .mov content will not play on most iPods or portable devices
Document – PDF (.pdf)

Details:

iTunes U supports the distribution of compressed audio and video files. Apple recommends using the following formats for your iTunes U audio and video content:

Audio Files (AAC, MP3) with appropriate file extensions (.m4a, .mp3)

For best results during playback, Apple recommends converting MP3 files greater than 32 megabytes (MB) to AAC format. For AAC audio files, Apple recommends the following specifications:

  • Audio Format: Baseline Low-Complexity Profile with AAC-LC (Music)
  • Data Rate: Up to 160 Kbps
  • Channels: Stereo in .m4v, .mp4, and .mov formats
  • Output Sample Rate: 48 kHz
  • Encoding Quality: Better

Video files (MPEG-4 with H.264 compression) with appropriate file extensions (.mp4, .m4v, .mov)

For best results with iPod, Apple recommends using MPEG-4 with H.264 compression with the following specifications:

  • Video Format: MPEG-4 with H.264
  • Data Rate: Up to 1.5 Mbps
  • Image Size: 640 x 480 pixels
  • Frame Rate: 30 frames per second
  • Key Frame: Every 24 frames
  • Audio Tracks: Baseline Low-Complexity Profile with AAC-LC audio up to 160 Kbps

Document Files

  • PDF