Video Contact Sheet and Sprite Builder is a desktop Linux utility for generating high-DPI NxM video thumbnail contact sheets and HTML5 WebVTT scrubber sprite atlases from local video files. An independent Linux alternative to Total Video Converter thumbnail and contact-sheet utilities, it combines fast keyframe extraction with customizable dark and light themes, technical stream headers, and batch folder processing.

Key Features:

• Customizable NxM Contact Sheets: Builds 3x3, 4x4, 5x6, or custom column-by-row high-DPI thumbnail grids from MP4, MKV, WebM, MOV, AVI, and TS videos with exact HH:MM:SS tile timestamps and adjustable tile width, padding, and borders.
• Technical Metadata Header: Renders video and audio codec names, container format, pixel dimensions, frame rate, duration, byte size, and SHA-256 file digest cleanly across dark studio, light print, and cinema slate themes.
• WebVTT Thumbnail Sprite Atlas Builder: Generates borderless sprite grids paired with standards-compliant .vtt cue files containing exact #xywh=x,y,w,h spatial coordinates for web video players.
• Multi-Format & Batch Folder Export: Exports sheets in PNG, JPEG, and WebP formats and processes multi-video folder queues with JSON manifest reporting.

Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by EffectMatrix or Total Video Converter.