Video::Sprites

Exports thumbnail images, thumbnail sprite image, and WebVTT metadata. ffmpeg and ImageMagick are required.

Installation

Add this line to your application's Gemfile:

gem 'video-sprites'

A complete, cross-platform solution to record, convert and stream audio and video.

Frames: Optional. Time between the snapshots. (Default 5 seconds.)

Width: Optional. Width of the each thumbnail. (Default 200.)

Columns: Number of columns in the sprite. (Default 5.)

Keep: Keep all the individual images and other intermediate artifacts.

Input: Input file or directory. (Default: Current working directory.)

Output: Output directory. (Default: Current working directory with "output" directory.)

URL base: base URL to use for

Clean: Optional. Clear the output directory for files named like the input file before execution. (Defaults to false)

video-sprites --interval 5 --width 200 --columns 5 --keepgenerated --input . --output ./output

Instead of creating one sprite, create multiple sprites and have them appropriately listed in the WebVTT file.
Allow for setting the base URL to use in the VTT file.
Consider adding an option to change the output filename.
Optionally allow for scene change detection and variable length cues. How difficult would this be?
Rename frames option to something that does a better job of communicating that a snapshot will be taken every so many seconds based on this value. "Frames" doesn't seem like the right word for this.