Choosing Keyframe Interval and Segment Size

Aug 1, 2017 @ 2:00 PM EST

Keyframes (also called I-frames) are the least efficient frames in the group of pictures (GOP), but are critical to efficiently switching streams when distributing adaptive bitrate (ABR) video. This makes choosing the optimal keyframe interval is critical to both high quality and efficient ABR operation.


The segment size of your ABR video impacts system reaction time and overall server load. If too long, the player won’t be able to react quickly enough for drops in bandwidth, increasing the likelihood of buffering. If too short, your server may be overwhelmed with HTTP requests, dropping throughput.

In this webinar, you will learn.


  •  what keyframes are and why they’re important
  •  how keyframe interval impacts video quality
  •  how keyframes impact stream switching in ABR technologies
  •  keyframe configurations for adaptive streaming
  •  how segment size impacts overall throughput
  •  choosing the optimal segment size