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smacke avatar

smacke/subsync

0
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7,747 stars·320 forks·Python·MIT·17 views

Subsync

Subsync is a subtitle synchronization tool that aligns subtitle timing to video audio tracks or other synchronized subtitle files. It functions as an audio-based aligner and timing validator to ensure dialogue and captions match during playback.

The system utilizes audio-text cross-correlation to match voice activity peaks in audio tracks against subtitle timestamps. It includes a remote media sync client that retrieves files from external servers using standard network protocols for local processing.

To ensure accuracy, the tool calculates confidence scores to block updates that fall below a quality threshold or contain implausible time offsets. Processing efficiency is managed through segment-based audio sampling and duration limits to reduce analysis time for long files.

The core logic can be driven through programmatic interfaces and monitored via callback handlers.

Features

  • Subtitle Synchronization - Aligns subtitles to a video by matching voice activity in the audio track with the timing of the text.
  • Audio-Text Cross-Correlation - Matches voice activity peaks in audio tracks against subtitle timestamps to calculate timing offsets.
  • Media Post-Processing Utilities - Provides automated tools to fix timing issues in video files and subtitles across large media collections.
  • Alignment - Calculates mathematical alignment scores to prevent subtitle updates that fall below a quality threshold.
  • Synchronization Quality Validation - Prevents subtitle modifications when the alignment score is too low or the time offset is implausible.
  • Timing Validation - Calculates alignment scores to ensure subtitle synchronization is accurate before applying modifications.
  • Performance Optimization - Reduces processing time for long files by sampling specific segments or limiting the analysis duration.
  • Audio Segmentation Utilities - Reduces analysis time by processing specific time windows of audio instead of the full duration.
  • Media Automation - Tool for automatically synchronizing subtitles with video.
  • Audio and Subtitle Tools - Tool to automatically synchronize subtitles with video.

Star history

Star history chart for smacke/subsyncStar history chart for smacke/subsync

How this analysis was created: This summary and feature list were written by an AI model that read the project's README and public documentation pages. Each feature links to the documentation it came from; stars, license and language come straight from the GitHub API. The model does not read the source code, and the analysis is refreshed when the project is re-analysed. Learn more on our About page.

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Frequently asked questions

What does smacke/subsync do?

Subsync is a subtitle synchronization tool that aligns subtitle timing to video audio tracks or other synchronized subtitle files. It functions as an audio-based aligner and timing validator to ensure dialogue and captions match during playback.

What are the main features of smacke/subsync?

The main features of smacke/subsync are: Subtitle Synchronization, Audio-Text Cross-Correlation, Media Post-Processing Utilities, Alignment, Synchronization Quality Validation, Timing Validation, Performance Optimization, Audio Segmentation Utilities.

What are some open-source alternatives to smacke/subsync?

Open-source alternatives to smacke/subsync include: trash-guides/guides — Guides is a collection of standardized architectural guides and best practices for deploying containerized media… smacke/ffsubsync — ffsubsync is a subtitle synchronization tool that aligns subtitle timestamps to audio tracks or reference files using… morpheus65535/bazarr — Bazarr is an automated subtitle management system and downloader designed to discover, acquire, and synchronize… nadermx/backgroundremover — Backgroundremover is an AI-powered tool that removes backgrounds from both images and videos, accessible through a… subtitleedit/subtitleedit — Subtitle Edit is a desktop application designed for the creation, synchronization, and adjustment of text-based… chinesesubfinder/chinesesubfinder — ChineseSubFinder is an automated subtitle manager and downloader specialized in retrieving Chinese language subtitles.…