I built a CLI to automate depth tracking on underwater videos
Hey HN, I built depthviz, an open-source CLI tool that generates depth & time overlay videos from dive logs. It supports dive computers (Garmin, Suunto, Shearwater, Apnealizer) and manual input for freedivers who want to enhance their footage with real-time dive data. Why I Built It: Adding dive data to videos manually is tedious. depthviz automates this by reading dive logs (.fit, .csv, .xml) from various sources, generating an overlay video with real-time depth, allowing full customization (fonts, colors, depth smoothing, stroke width), and running on Windows, macOS, and Linux. How It…
In plain words
Depthviz is an open-source command-line tool that automatically overlays depth and time data onto underwater videos using dive logs. It reads files from popular dive computers including Garmin, Suunto, and Shearwater, as well as manual CSV input for freedivers. The tool generates customizable overlays with adjustable fonts, colors, and depth smoothing, then exports videos compatible with standard editing software like Premiere Pro and DaVinci Resolve. It runs on Windows, macOS, and Linux, eliminating the manual process of adding dive data to footage.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey HN, I built depthviz, an open-source CLI tool that generates depth & time overlay videos from dive logs. It supports dive computers (Garmin, Suunto, Shearwater, Apnealizer) and manual input for freedivers who want to enhance their footage with real-time dive data. Why I Built It: Adding dive data to videos manually is tedious. depthviz automates this by reading dive logs (.fit, .csv, .xml) from various sources, generating an overlay video with real-time depth, allowing full customization (fonts, colors, depth smoothing, stroke width), and running on Windows, macOS, and Linux. How It Works: Export a dive log from a dive computer or create a manual CSV. Run a single command. Then import the overlay into CapCut, Premiere Pro, DaVinci Resolve, etc. Looking for Feedback On: README – Is it clear, engaging, and well-structured? (Most wanted!) / Installation & Usability – Is the setup intuitive enough? / or Anything you'd expect from a tool like this? GitHub: https://github.com/noppanut15/depthviz Would love to hear your thoughts!
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