Ride Data Overlay

Large-file workflow

Local 4K and H.265 Cycling Video Overlays Without Uploading

Ride Data Overlay reads source media and renders the output on your device. For a large 4K H.265 ride, first run the browser capability check, keep enough free disk space for the output, verify a short section, and only then start the full render.

Product demo: cycling telemetry rendered over ride footage by Ride Data Overlay.

Step-by-step workflow

  1. 1

    Use a supported current browser

    Open the tool and review its codec and file-output capability checks before importing a long ride.

  2. 2

    Keep source files on a fast local drive

    Avoid network volumes and ensure the output destination has enough free space.

  3. 3

    Import and align locally

    Choose the large video and FIT or GPX file; neither media file is sent through the app server.

  4. 4

    Test a short export

    Confirm codec playback, gauge readability, and synchronization with a short segment.

  5. 5

    Render the complete timeline

    Keep the tab active and avoid sleep or low-power conditions during a long export.

Why browser support matters

Local processing removes upload time, but it does not remove codec constraints. Decode and encode support depend on the operating system, browser, and hardware.

The export pipeline prefers HEVC when supported and can fall back to H.264. A capability result is more reliable than assuming support from the browser name alone.

Large-file checklist

  • Keep the original media; do not overwrite it with the first export.
  • Use a short validation render before committing to the entire ride.
  • Confirm the output destination and available disk space.
  • Close memory-heavy tabs and prevent the computer from sleeping.
  • Check the final file in a separate player before deleting intermediates.

Privacy boundary

The media-processing path is local. Sign-in, billing authorization, and optional analytics still use network services, as described in the privacy policy. “Local processing” does not mean the entire website works offline.

Frequently asked questions

Does local processing guarantee H.265 export?

No. HEVC support depends on the browser, operating system, and hardware. The app checks capabilities and may use H.264 instead.

Can I work with a video that is tens of gigabytes?

The local architecture is designed to avoid uploading large files, but practical limits still depend on browser support, memory, storage, codec, and hardware.

Should I test before a full 4K export?

Yes. A short export is the fastest way to verify synchronization, codec playback, and visual layout.

Related guides

Last reviewed July 20, 2026. Report factual corrections to [email protected].