Best video settings (advanced encoding) and formats to use on TeacherTube.

Recommended bitrates, codecs, and resolutions, and more

Recommended Video File Type

We recommend using MP4. If you are using another format other than MP4, we suggest downloading this FREE tool called HandBrake. https://handbrake.fr/downloads.php

Container: .mp4

  • No Edit Lists (or you may lose AV sync)
  • moov atom at the front of the file (Fast Start)

Audio Codec: AAC-LC

  • Channels: Stereo or Stereo + 5.1
  • Sample rate 96khz or 48 khz

Video Codec: H.264

  • Progressive scan (no interlacing)
  • High Profile
  • 2 consecutive B frames
  • Closed GOP. GOP of half the frame rate.
  • CABAC
  • Variable bitrate. No bitrate limit required, though we offer recommended bit rates below for reference
  • Chroma subsampling: 4:2:0

Frame rates

Frame rates should match the source material. For example, content shot in 24fps should be encoded and uploaded at 24fps. Content recorded at 30fps should be uploaded at 30fps. Content shot in 720p60, should be uploaded at 720p60. Content at 1080i 60, should be deinterlaced, going from 60 interlaced fields per second to 30 progressive frames per second before uploading.

Bitrates

Standard quality uploads
TypeVideo BitrateMono Audio BitrateStereo Audio Bitrate5.1 Audio Bitrate
2160p (4k)35-45 Mbps128 kbps384 kbps512 kbps
1440p (2k)10 Mbps128 kbps384 kbps512 kbps
1080p8,000 kbps128 kbps384 kbps512 kbps
720p5,000 kbps128 kbps384 kbps512 kbps
480p2,500 kbps64 kbps128 kbps196 kbps
360p1,000 kbps64 kbps128 kbps196 kbps

High quality uploads for creators with enterprise quality internet connections

TypeVideo BitrateMono Audio BitrateStereo Audio Bitrate5.1 Audio Bitrate
1080p50,000 kbps128 kbps384 kbps512 kbps
720p30,000 kbps128 kbps384 kbps512 kbps
480p15,000 kbps128 kbps384 kbps512 kbps
360p5,000 kbps128 kbps384 kbps512 kbps

Resolutions

TeacherTube uses 16:9 aspect ratio players. If you are uploading a non-16:9 file, it will be processed and displayed correctly as well, with pillar boxes (black bars on the left and right) or letter boxes (black bars at the top and bottom) provided by the player. If you want to fit the player perfectly, encode at these resolutions:

  • 2160p: 3840x2160
  • 1440p: 2560x1440
  • 1080p: 1920x1080
  • 720p: 1280x720
  • 480p: 854x480
  • 360p: 640x360
  • 240p: 426x240

The TeacherTube player automatically adds black bars so that videos are displayed correctly without cropping or stretching, no matter the size of the video or the player.

For example, the player will automatically add pillarboxing to 4:3 videos in the new 16:9 widescreen player size. If the player is re-sized (i.e. when embedded on another website), the same process takes place so that 16:9 videos are letterboxed when the player is sized to 4:3. Similarly, anamorphic videos will be automatically letterboxed when shown in either 16:9 or 4:3 sized players. The player can only do this if the native aspect ratio of the video is maintained.








*REFERENCE: https://support.google.com/youtube/answer/1722171?hl=en

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