Teradek Prism Rack v1 (853/873) firmware v1.2

Teradek · Released Feb 3, 2021 · First seen Jul 11, 2026

v1.2 is not the latest firmware for the Teradek Prism Rack v1 (853/873): the current version is v2.25.20261021 (October 21, 2026). Go to v2.25.20261021

What's in this update

Teradek Prism Firmware Version 1.2

New Features

  • Added RTSP support for encoders
  • Added RTSP support for decoders - for best performance, setting protocol to TCP is recommended
  • Added audio mute option
  • Added Wowza Cloud support
  • Added time/timecod​e OSD burn-in text options

Changes and

Improvements

  • Overall system stability

improvements

  • Further improved SRT stream robustness
  • Added IP address of currently connected card in chassis overview screen
  • Mute audio when disabled to allow streaming to RTMP destinations
  • Automatically disable adaptive bitrate when Bonding stream buffer i​s set to 0 for low latency streaming

Bug Fixes

  • Fixed potential crashes/memory leaks for multiple system processes
  • Encoding frame rate could degrade after 7+ days
  • Core control connection sometimes failed to reconnect after interruption
  • Decoder stopped processing audio if encoder video format changed
  • Cards could fail to reboot after a firmware update
  • Web UI was not displayed correctly in Internet Explorer
  • Fixed some front panel display issues
  • Network info was not displayed under the main status tab
  • Web UI password could not be set back to default 'admin' value

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Other versions for this product

See the full firmware history for the Prism Rack v1 (853/873)