Teradek User Guide

Airmix: How to Adjust Your Stream’s Quality with Encoder Settings

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You can control the quality and bitrate of your streams to find a balance between your data bandwidth use and the streamed video quality. We recommend testing your internet connection speed and choosing a suitable setting for your connection’s average bitrate.

First, tap on the Blue Settings Button on the upper right of the screen.

Tap Encoder Settings.

Choose one of the resolution/bitrate presets tabs.

Or choose the Manual tab to create your custom settings.

Let’s create our own settings in the Manual tab. Tap resolution to select resolutions from 140p to 1080p

Tap Video Bitrate to set the bitrate between 200kbps to 5000kbps.

Tap Audio Bitrate to set your audio quality, from 16 to 256 kbps.

Tap framerate to set your stream’s framerate. Lower frame rates allow higher quality per frame at expense of video smoothness.

Tap Keyframe interval and to choose how often a full quality image is refreshed in your stream. Streams with a lot of movement benefit from shorter keyframe intervals.

Tap Encoder Profile to choose your preferred encoder profile. 

Baseline is recommended for older, slower iPads but may require more bandwidth, which High is more bandwidth-efficient but a faster iPad is recommended.

Tap to toggle Adaptive Bitrate on and off. Adaptive bitrate will lower the video bitrate and quality if slowdowns in connection speed occur. The setting will also raise the bitrate to 1.3x of the user setting if there is enough available bandwidth.

Tap to toggle bitrate limiting. Bitrate limiting keeps Adaptive Bitrate from raising the video bitrate past 1.3x above your defined bitrate. If turned off, then Adaptive Bitrate will raise the bitrate up to 2x above the user defined bitrate if the bandwidth is available.

Tap Done to save your settings.

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