RocketLaunchCountdown is a Python + HTML system to operate a launch countdown and Go/No-Go indicator. The Go/No-Go indicator can be driven either from a spreadsheet (CSV export via a share link configured in the Settings window) or from manual buttons in the app. The mode is selected with the radio button in Settings.

Latest release

RocketLaunchCountdown 0.7.0

Features added

Added ability to change clock once in T+.
Added Major Concerns display.

OBS instructions

To use the HTML files in OBS (or similar software) as browser sources:

Create a Browser source.
Select Local file and choose the HTML file you want to display (e.g. countdown.html, gonogo.html, major_concerns.html).
Check Shutdown source when not visible and Refresh browser when scene becomes active.
(Optional) Install the xObsBrowserAutoRefresh extension to enable timed automatic refreshes.
- Download: https://obsproject.com/forum/resources/xobsbrowserautorefresh-timed-automatic-browser-source-refreshing.1677
- Set auto-refresh times to your preference. Note: very fast refresh rates increase the chance of browser caching issues.

Caution: The xObsBrowserAutoRefresh extension may not have a Mac version.

Install instructions

Install is simple: download the installer, run it, and follow the prompts to install RocketLaunchCountdown.

If you want help wiring this into OBS (example scene setup, recommended refresh settings, or troubleshooting browser-source caching), tell me the OBS version and platform and I can give a short step-by-step.