Composer Reference Guide R2-2026-2.6.9642.28010

R2 2023

v1.6.8581.17147 — released 2023-06-30.

The release that introduced the CAV codec, RTMP input/output, and Slack alarm notifications. Many operators have been added since, but several of the still-current core targets — RTMP Target, UDP Message Target — first shipped here.

Highlights:

  • CAV codec — high-performance video format with a standalone transcoder and player.
  • RTMP Input — streaming ingest support.
  • RTMP Target — configurable player URL with browser-launch helper.
  • UDP Message Target — OSC-protocol support over UDP.
  • Video Delay operator — temporal video adjustment.
  • Color Adjust operator — gain, gamma, lift, hue, saturation, channel ops in one operator.
  • Slack alarm notifications.

Inputs

  • CAV codec — standalone transcoder + player; high-performance format for fast playback of pre-encoded media.
  • RTMP Input — streaming ingest.
  • Text Input — platform-dependent text rendering.
  • Still-image auto-reload on source-file change.
  • Media import tool (images, clips, CAV files).
  • Blackmagic Decklink Capture v3 pause functionality.

Targets

Operators

  • Video Delay — temporal video adjustment.
  • Color Adjust — gain, gamma, lift, hue, saturation, and channel operations in one operator.
  • HSV Range Keyer hue selection tuning.

UI / Desktop

  • Project autosave (5-minute interval).
  • Scene duplication, including operators and targets.
  • Licence info now shows plug-in counts.
  • LUT file export.
  • Right-click menu for adding inputs to a scene.
  • Video Analyzer skin-tone reference line.

Other

  • Prometheus-compatible monitoring endpoint.
  • Extended logging for RTMP statistics.
  • NDI Target channel naming simplified.
  • Slack alarm notifications.

Bug fixes

Chromium renderer lockups, NDI target issues, Face Detector API and memory issues, operator ID uniqueness, file access, RTMP audio PTS, Linux / WSL image loading.

Platform note for Windows 11 users: in some cases, GPU hardware acceleration causes encoder issues; see Performance and optimization for the recommended Windows 11 toggle to disable.