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1. Digital "master" file:
   
   
   1. MKV or MOV wrapper
   2. Native codec and native audio
   3. The original data should be captured in its entirety
   4. Maintain the original aspect ratio, recording standard, interlacing, number of audio channels and auxiliary information such as original timecode and closed captioning
      
      
2. Digital "access copy":
   
   
   1. MPEG4 wrapper 
   2. Video encoded using the H.264 codec
   3. Bitrate of 5000 Kbps
   4. Audio encoded as uncompressed AAC, 44.1kHz, 256 Kbps
   5. Maintain the original aspect ratio, recording standard, frame rate, number of audio channels and auxiliary information such as original timecode and closed captioning

Storage requirements for digital video

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Simple formulas can be used to calculate approximate storage requirements for digital video:

File size = bitrate * number of minutes * .0075.
Bitrate = file size / (number of minutes * .0075)
Number of minutes = file size / (bitrate * .0075)

For example, 2 hours (120 minutes) of video compressed using a 175 mb/sec codec will require approximately 157.5 GB of storage space.

157.5 GB = 175 mb/sec * 120 minutes * .0075