Encoding Specifications for iTunes U and YouTube
iTunes U Encoding Specifications
Audio:
- Unedited – .AIFF or .WAV (uncompressed)
Edited – 256 kbps .mp4 (AAC) stereo audio with voice filtering or 320 kbps .mp3 stereo audio
4:3 Video:
- Standard Resolution Edited Video (VGA):
- H.264 .mp4: 30 fps, 640×480, 3000 kbps bitrate, progressive encoding and 256 kbps AAC audio
16:9 Video
- Standard Resolution Edited Video (VGA):
- H.264 .mp4: 30 fps, 640×360, 3000 kbps bitrate, progressive encoding and 256 kbps AAC audio
- High Definition Edited Video (720p):
- H.264 .mp4: 24-60 fps, 1280×720, 5000 kbps bitrate, progressive encoding and 256 kbps AAC audio
- Full Resolution Intermediate Codecs including ProRes 422
YouTube Encoding Specifications
4:3 Video
- Standard Resolution Edited Video (VGA):
- H.264 .mp4: 30 fps, 640×480, 3000 kbps bitrate, progressive encoding and 256 kbps AAC audio
16:9 Video
- Standard Resolution Edited Video (VGA):
- H.264 .mp4: 30 fps, 640×360, 3000 kbps bitrate, progressive encoding and 256 kbps AAC audio
- High Definition Edited Video (720p):
- H.264 .mp4: 24-60 fps, 1280×720, 5000 kbps bitrate, progressive encoding and 256 kbps AAC audio
- Full Resolution High Definition Edited Video (1080p):
- Apple Pro-Res 422 .mov file
- Full Resolution Intermediate Codecs including ProRes 422
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