Video file standard

Once downloaded from the video camera all files should be processed to this standard. MP4 files from our Canon XA20 and GoPro cameras are already in (or very close to) this format and do not need processing. Using this combination of MP4 files with H.264 video compression and AAC audio compression ensures that videos will be playable on all Mac and Windows computers along with most tablets, smart tv's and other media devices.

Container file type: MP4

Video format
  • Compression type: H.264
    • Standard definition: 640x480 px
      • Target bitrate: 10,000 kbits/s
    • 720p high definition: 1280x720 px
      • Target bitrate: 20,000 kbit/s
    • 1080p high definition: 1920x1080 px
      • Target bitrate: 30,000 kbits/s
  • Frame rate: 25 fps
    • Keyframes: 25

Audio format
  • Compression type: AAC
  • Data rate: 320 kbits/s
  • Sample rate: 48 kHz

File sizes

Working with video requires large amounts of storage capacity. Plan for the amount of data collection you will conduct and the quality of video you will record.

Video quality
File size per hour of video (roughly)
Standard definition (640x480 px)
720p high definition (1280x720 px)
1080p high definition (1920x1080 px)

File storage standard

All copies of video files that contain research materials must be accounted for at all times. Files must be stored on encrypted password protected servers, drives or folders/directories.

An original copy of all video files should be kept on a hardware encrypted external hard drive. This drive should be kept in a safe place at the university and used only as a reference. Working files should be copied from the original files to either a password protected computer, another hardware encrypted external hard drive, or a university owned server.

Appropriate storage media
Inappropriate storage media
Password protected work computer

Hardware encrypted external hard drives
e.g. Western Digital My Passport Ultra series

University of Gothenburg personal storage server from DAFGU computers

Dept. of Education, Communication & Learning's research server

University of Gothenburg GUBox server
Non-password protected home computer

Non-encrypted external hard drive

iPad, smartphone or other tablet device (if not protected by an encryption app)

USB memorystick
(unless files have been encrypted first)

DVD (unless files have been encrypted first)

Non university owned servers