skills.rest
altqx
altqxCOMMUNITY
Explore all skills by this author →
GitHub

libbitsub

Render PGS, VobSub, and MKS bitmap subtitles in browser video players.

15|3|Updated Dec 5, 2025
Search Tags:#gpu#wasm#browser#subtitle#pgs#vobsub
One-click install
npx skills add https://github.com/altqx/libbitsub --skill libbitsub
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: libbitsub
Source: https://github.com/altqx/libbitsub/tree/main
Command: npx skills add https://github.com/altqx/libbitsub --skill libbitsub

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

libbitsub provides a high-performance WebAssembly-based bitmap subtitle renderer for PGS, VobSub, and MKS-embedded subtitles in the browser, enabling overlay rendering on video players.

Core Features & Use Cases

  • Overlay rendering of bitmap subtitles onto HTML5 video elements with GPU-accelerated backends and automatic fallback.
  • Layout controls including scale, aspect mode, vertical/horizontal offsets, alignment, bottom padding, safe area, and opacity to precisely position subtitles.
  • Low-level parsers and high-level renderers with metadata and diagnostics for debugging and integration in media apps.

Quick Start

Instantiate the PgsRenderer with a video element and subtitle source, then render the first cue on the overlay.

Frequently Asked Questions about libbitsub

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I render PGS and VobSub bitmap subtitles in a browser video player?▼

You can render PGS and VobSub bitmap subtitles in a browser video player using a WASM-based renderer that applies GPU-accelerated overlay rendering directly onto HTML5 video elements.

Does browser subtitle rendering support GPU acceleration with automatic fallback?▼

Browser subtitle rendering supports GPU-accelerated backends with automatic fallback to ensure overlay rendering remains functional across different browser environments.

Can I control layout and positioning for bitmap subtitle overlays in the browser?▼

Bitmap subtitle overlays support layout controls including scale, aspect mode, vertical and horizontal offsets, alignment, bottom padding, safe area, and opacity for precise positioning.

How do I extract metadata and debug bitmap subtitle tracks programmatically?▼

You can extract metadata and debug bitmap subtitle tracks by utilizing low-level parsers that provide clear diagnostics for integration within media applications.

Are there high-level and low-level APIs available for MKS-embedded subtitle parsing?▼

MKS-embedded subtitle parsing exposes a stable API surface providing both high-level renderers for runtime video overlays and low-level parsers for programmatic extraction.

What is the best way to handle bitmap subtitle rendering without compromising web player performance?▼

The best way to handle bitmap subtitle rendering without compromising performance involves using a WebAssembly-based renderer to apply GPU-accelerated overlay rendering with automatic fallback.

Related Skills

Explore More Software Engineering Skills→
AnushkaTandon26AnushkaTandon26

brightdata-web-mcp

Provide live web access for MCP-enabled agents to bypass anti-bot measures.

Community
Advanced
giolaqgiolaq
4

tmdb-integration

Fetch TMDB movies, shows, posters, and trailers for React Native TV apps.

Community
Intermediate
visioforgevisioforge

media-player-sdk-net-wpf

Integrates VisioForge Media Player SDK into WPF apps for video/audio playback.

Community
Intermediate
billlzzz18billlzzz18

youtube-transcribe-skill

Extract YouTube video subtitles and save them as timestamped text files.

Community
Advanced