Technical Guidelines: Overview

All producers of video and audio content for Brown on iTunes U  should read this page before they begin to produce and compress their audio and video materials for upload.

Materials posted on Brown on iTunes U are available for the entire world to download and play. It is very important that producers keep an eye on content, duration and quality. You'll get the best quality by starting with good recording techniques. Proper microphones are needed for good audio recording. Video recording is helped by good lighting and getting close to your subject. Spend some time learning some video recording techniques. Bad recordings can rarely be fixed; the old saying "garbage in, garbage out" applies here.

Brown on iTunes U functions as a content management and delivery platform for a compressed output version of an original media source.  At this time, compressed formats for iTunes U are mostly variations of MPEG (.m4a or .mp3 for audio; .mp4, .m4v and .mov for video). Brown on iTunes U is a distribution service only, not a storage space for uncompressed original media. The Contributor is responsible for archiving the uncompressed source elsewhere. 

Brown on iTunes U accepts all formats described by Apple.

Please refer to our Policy Guidelines for more details about policies, acceptable content, copyright, and more.

File size:  Size limit for each file uploaded is 500 MB.

Formats: Content may be submitted in the following formats:

  • 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.
  • Video files (H.264 MPEG-4 and MOV) with appropriate file extensions (.mp4, .m4v, .mov). Old video files which don't use the H264 codec will work, provided the file extension is .mp4 or .mov. Newly produced files must use the proper H264 codec.
For AAC audio files, Apple recommends the following specifications: For iPod-optimized video 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 format
Output Sample Rate: 48 kHz
Encoding Quality: Better
Video Format: MPEG-4 with H.264 compression using appropriate file extensions (.mp4, .m4v, .mov).
Data Rate: Up to 1.5 Mbps
Image Size: 640 x 480 pixels
Frame Rate: 30 frames per second
Key Frame: Every 24 frames

There is no duration limit provided you stay within the proper filesize and use the proper formats.

Each Brown Contributor should be very familiar with all accepted formats prior to submitting content. Here a few guidelines on how to go about creating iTunes U compatible audio and video.

 For further information please see Apple’s Supported Formats. Apple also provides other helpful information on content, format and media.

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