How to convert SRT to WebVTT using astisub CLI?

Run the command 'astisub convert -i input.srt -o output.vtt'. The CLI handles conversion between all supported formats seamlessly, as shown in the README examples for direct file operations.

astisub vs Python's pysubtitle for subtitle processing – which should I use?

astisub is ideal for Go-based projects or CLI automation in Go environments, offering a dependency-free library. For Python ecosystems, pysubtitle or similar libraries might integrate more naturally, though astisub's CLI provides cross-language utility.

How do I merge multiple subtitle files in Go with astisub?

Load subtitle files using astisub.OpenFile or ReadFrom functions, then call the Merge method on one subtitle object with another. Remember to handle errors, as the README warns, to avoid runtime issues.

Does astisub support advanced .ass file styling like animations?

astisub supports .ass file parsing and writing for basic subtitle manipulation, but it focuses on core operations like timing and formatting. For complex styling effects, you may need to extend the library or use specialized tools.

Can I batch process subtitle files with astisub for a video series?

Yes, use the CLI commands like sync or convert in shell scripts for batch operations, or programmatically loop through files in Go. The optimize and linear correction features help standardize timing across multiple files.

How to handle errors when using the astisub library in my code?

Always check errors returned by functions like OpenFile or Write, as the README emphasizes. Implement error handling in your Go code to manage issues like file corruption or format mismatches gracefully.

go-astisub — Go Subtitle File Toolkit

What is go-astisub?

astisub is a Go library and command-line tool for manipulating subtitle files. It enables parsing, writing, syncing, merging, and converting between popular subtitle formats like SRT, TTML, WebVTT, and ASS. It solves the problem of handling subtitle processing programmatically within Go applications or via CLI workflows.

Target Audience

Go developers building media processing pipelines, video editing tools, or subtitle conversion utilities, as well as users needing a CLI for batch subtitle operations.

Value Proposition

It offers a pure-Go, dependency-free solution with extensive format support and a rich set of manipulation features, making it a versatile alternative to fragmented or language-specific subtitle tools.

Manipulate subtitles in GO (.srt, .ssa/.ass, .stl, .ttml, .vtt (webvtt), teletext, etc.)

Use Cases

Best For

Converting subtitle files between formats like SRT to WebVTT
Syncing subtitle timing offsets in video post-production
Merging multiple subtitle tracks into a single file
Programmatically processing subtitles in Go media applications
Batch processing subtitle files via CLI automation
Correcting subtitle timing with linear adjustment algorithms

Not Ideal For

Real-time video players requiring graphical subtitle rendering with advanced animations
Teams working in non-Go ecosystems needing subtitle processing libraries
Projects specifically dependent on .smi subtitle format support (not yet implemented)
Users seeking a GUI-based subtitle editor with drag-and-drop functionality

Pros & Cons

Pros

Broad Format Compatibility

Supports parsing and writing across seven subtitle formats including SRT, TTML, VTT, and ASS, covering most industry standards as listed in the README.

Comprehensive Manipulation Features

Provides functions for syncing, merging, fragmenting, optimizing, and linear correction, enabling end-to-end subtitle processing with clear examples in the code snippets.

Standalone CLI Tool

Includes a command-line interface for direct file conversion and operations like merging without writing Go code, useful for automation and batch processing.

Go-Native and Dependency-Free

Built in pure Go with no external dependencies, ensuring easy integration into Go projects and reliable performance, backed by test badges in the README.

Cons

Missing .smi Format Support

The library does not yet support .smi subtitle files, as indicated in the roadmap with '[ ] .smi', limiting compatibility for specific use cases requiring this format.

Error Handling Overhead

Code examples in the README omit error handling for readability, requiring developers to implement proper error management, which can lead to bugs if overlooked in production.

CLI Requires Go Installation

Using the standalone CLI necessitates having Go installed via 'go install', which may be a barrier for users unfamiliar with Go or preferring binary distributions without dependencies.

Frequently Asked Questions

What is go-astisub?

Target Audience

Go developers building media processing pipelines, video editing tools, or subtitle conversion utilities, as well as users needing a CLI for batch subtitle operations.

Value Proposition

Use Cases

Best For

Converting subtitle files between formats like SRT to WebVTT
Syncing subtitle timing offsets in video post-production
Merging multiple subtitle tracks into a single file
Programmatically processing subtitles in Go media applications
Batch processing subtitle files via CLI automation
Correcting subtitle timing with linear adjustment algorithms

Not Ideal For

Real-time video players requiring graphical subtitle rendering with advanced animations
Teams working in non-Go ecosystems needing subtitle processing libraries
Projects specifically dependent on .smi subtitle format support (not yet implemented)
Users seeking a GUI-based subtitle editor with drag-and-drop functionality

Pros & Cons

Pros

Broad Format Compatibility

Supports parsing and writing across seven subtitle formats including SRT, TTML, VTT, and ASS, covering most industry standards as listed in the README.

Comprehensive Manipulation Features

Provides functions for syncing, merging, fragmenting, optimizing, and linear correction, enabling end-to-end subtitle processing with clear examples in the code snippets.

Standalone CLI Tool

Includes a command-line interface for direct file conversion and operations like merging without writing Go code, useful for automation and batch processing.

Go-Native and Dependency-Free

Built in pure Go with no external dependencies, ensuring easy integration into Go projects and reliable performance, backed by test badges in the README.

Cons

Missing .smi Format Support

The library does not yet support .smi subtitle files, as indicated in the roadmap with '[ ] .smi', limiting compatibility for specific use cases requiring this format.

Error Handling Overhead

Code examples in the README omit error handling for readability, requiring developers to implement proper error management, which can lead to bugs if overlooked in production.

CLI Requires Go Installation

Using the standalone CLI necessitates having Go installed via 'go install', which may be a barrier for users unfamiliar with Go or preferring binary distributions without dependencies.

Frequently Asked Questions

go-astisub

What is go-astisub?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?

go-astisub

What is go-astisub?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?