ffrs - Media Conversion CLI Tool

ffrs is a CLI tool that translates plain English commands into ffmpeg commands. It provides both a library API and a command-line interface for media conversion tasks.

The Story

I’m a simple guy.

I watch a YouTube livestream about vibe coding. That curiosity pulls me into a search. I look up spec-kit—and there it is. Found.

Then I drift. I scroll my Facebook timeline. Scroll. Scroll again. Refresh.

Suddenly, nixCraft posts about the ffrs CLI tool. Yeah, it’s written in JavaScript—and the comment section is exactly what you’d expect.

Then someone drops the line that changes everything:

“This is my only complaint. It’s a great idea—just rewrite it in Rust or Go and ship it as a single binary.”

Me? Why not.

No overthinking. No debate. Just momentum.

Vibe it. Build it. Ship it.

Features

• Translate plain English commands to ffmpeg commands
• Support for multiple media formats
• Interactive and direct command modes
• Dry-run functionality
• Deterministic and inspectable command generation

Installation

As a Binary

You can install ffrs using Cargo:

cargo install ffrs

From Source

git clone https://github.com/darkterminal/ffrs.git
cd ffrs
cargo install --path .

Usage

Command Line Interface

# Convert a video file
ffrs "convert video.mp4 to video.avi"

# Interactive mode
ffrs --interactive

# Dry run (shows command without executing)
ffrs --dry-run "convert video.mp4 to video.avi"

# Specify output directory
ffrs --output /path/to/output "convert video.mp4 to video.avi"

As a Library

Add to your Cargo.toml:

[dependencies]
ffrs = "0.1.0"

Use in your code:

use ffrs::{Tokenizer, Parser, CommandBuilder};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Tokenize the command
    let mut tokenizer = Tokenizer::new("convert video.mp4 to video.avi");
    let tokens = tokenizer.tokenize();

    // Parse the tokens into an intent
    let mut parser = Parser::new(tokens);
    let intent = parser.parse()?;

    // Build the ffmpeg command
    let cmd_builder = CommandBuilder::new();
    let ffmpeg_cmd = cmd_builder.build_command(&intent)?;

    println!("Generated command: {}", ffmpeg_cmd);

    Ok(())
}

Supported Formats

• Video: MP4, AVI, MOV, WMV, MKV, WebM
• Audio: MP3, WAV, FLAC
• Images: JPG, PNG, GIF

License

This project is licensed under the MIT License - see the LICENSE file for details.