[Feature] Issue: Subtitle Drift (Linear Time Dilation)

[thecrazy]

The Problem:
Subtitles gradually lose sync due to altered video speeds; adjusting the player’s playback speed fails to fix this as it scales both video and subtitles simultaneously.

Expected Behavior:
Subtitles should remain synchronized throughout the video by scaling their playback rate independently of the video speed.

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Proposed Technical Fixes

• Linear Time Scaling: Add a subtitle scaling/stretch factor (e.g., a ratio like 1.001) that adjusts the subtitle timestamps independently of the video playback speed.
• Two-Point Sync: Allow users to synchronize subtitles at two different points (Point A and Point B) and then use those data points to calculate and apply the necessary time-stretch ratio.
• Framerate Presets: Provide one-click buttons for common conversion ratios (e.g., 23.976fps → 25fps) to fix standard encoding mismatches.
• Auto-Detection & Audio Matching: Use available synchronization tool metrics or audio waveforms to automatically align subtitles. It may be possible to leverage a similar technique to intro/outro detection to match subtitle text timing with detected speech "zones" or "bubbles" in the audio data.

[thecrazy]

Sorry I don't have a "legit" example on hand but if you need an sample of content showing this behavior you can try
www.dailymotion.com/video/x6tvycx

If it doesnt work you can probably find an alternative here, most Stargate Atlantis and SG1 episode had this behavior:

https://www.dailymotion.com/search/stargate atlantis s02e20/