GMA TimecodeScreen - HowTo

Recording rehearsal videos with timecode using OBS


  • Mac Computer (MacBook, iMac, …)
  • Open Broadcaster Studio (download)
  • GMA TimecodeScreen (download)
  • Video Capture Device (any Webcam, AJA U-TAP, BlackmagicDesign UltraStudio)
  • Network connection to your grandMA2 lighting console session

1. Prepare

Install all required apps and connect your capture device to your computer.
Also connect your computer to your grandMA2 session using wired ethernet or fast WiFi.

2. Launch GMA TimecodeScreen

Launch GMA TimecodeScreen and verify the connection to your gramdMA2 session.
Select the MANET2 session id and the TimecodeSlot from the menu.
After successful launch, you should see (00:00:00:00) or any running timecode.

Hint: If you keep seeing “(no session)”, you have to disable all other network interfaces except the one connected to MANET2 and restart the connector.

3. Configure OBS settings

  1. Launch OBS
  2. Settings > Video
    Adjust settings to your needs. 1920x1080 and 25 or 30 fps would be a good starting point.
  3. Settings > Output
    Adjust settings to your needs. Default settings are fine. Use MKV refording format with software encoder.
  4. Settings > Advanced Recording: Enable “Automatically remux to mp4”

4. Configure OBS recording scene

  1. Create a new scene collection (Scene Collection menu > New)
  2. Add a new video capture source
    Source window > “+” icon > Video Capture Device > select your capture device
  3. Transform source to fit your recording canvas
    Right click on source > Transform > Fit to screen
  4. Add a new display capture source
    Source window > “+” icon > Display Capture Crop: To Window, Window: GMA TimecodeScreen
  5. Optional: Adjust the overlay style
    Transform > Edit Transorm, Filters > Color Correction > Opacity, …
  6. Optional: Add audio capture source
    Source window > “+” icon > Audio Capture Device > select your capture device

5. Press “Start Recording”

After the recording has been stopped, OBS converts the recorded MKV file to MP4 automatically.

This page was last updated: September 10, 2021