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https://github.com/tj/letterbox

Go program to batch-process letter-boxing of photographs.
https://github.com/tj/letterbox

golang image-processing instagram photography

Last synced: 4 days ago
JSON representation

Go program to batch-process letter-boxing of photographs.

Host: GitHub
URL: https://github.com/tj/letterbox
Owner: tj
License: mit
Created: 2019-10-22T12:13:08.000Z (about 5 years ago)
Default Branch: master
Last Pushed: 2023-03-07T02:21:23.000Z (over 1 year ago)
Last Synced: 2024-10-26T09:44:40.129Z (10 days ago)
Topics: golang, image-processing, instagram, photography
Language: Go
Homepage:
Size: 20.5 KB
Stars: 168
Watchers: 5
Forks: 11
Open Issues: 2
Metadata Files:
- Readme: Readme.md
- Funding: .github/FUNDING.yml
- License: LICENSE

Awesome Lists containing this project

awesome - tj/letterbox - Go program to batch-process letter-boxing of photographs. (Go)

README

        # Letterbox

A tiny Go program to batch-process letter-boxing of photographs.

## Installation

From [gobinaries.com](https://gobinaries.com):

```sh

$ curl -sf https://gobinaries.com/tj/letterbox/cmd/letterbox | sh

```

From source:

```

$ go get github.com/tj/letterbox/cmd/letterbox

```

## Usage

```

Usage of letterbox:

  -aspect string

    	Output aspect ratio (default "16:9")

  -concurrency int

    	Concurrency of image processing (default 8)

  -force

    	Force image reprocess when it exists

  -output string

    	Image output directory (default "processed")

  -padding int

    	Output image padding in percentage

  -quality int

    	Output jpeg quality (default 90)

  -white

    	Output a white letterbox

```

## Examples

Example of 1:1

```

$ letterbox -aspect 1:1

```

![](https://apex-software.imgix.net/github/tj/letterbox/1-1.jpg?w=500&dpr=2)

Example of 4:3

```

$ letterbox -aspect 4:3

```

![](https://apex-software.imgix.net/github/tj/letterbox/4-3.jpg?w=500&dpr=2)

Example of 16:9 (the default)

```

$ letterbox -aspect 16:9

```

![](https://apex-software.imgix.net/github/tj/letterbox/16-9.jpg?w=500&dpr=2)

Example of explicitly listing images:

```

$ letterbox DSCF6719.jpg DSCF6718.jpg

```

![](https://apex-software.imgix.net/github/tj/letterbox/16-9.jpg?w=500&dpr=2)

Example of 1:1 with a white background and 6% padding:

```

$ letterbox -white -aspect 1:1 -padding 6

```

![](https://apex-software.imgix.net/github/tj/letterbox/1-1-white.jpg?w=500&dpr=2)

---

[![GoDoc](https://godoc.org/github.com/tj/letterbox?status.svg)](https://godoc.org/github.com/tj/letterbox)

![](https://img.shields.io/badge/license-MIT-blue.svg)

![](https://img.shields.io/badge/status-stable-green.svg)

## Sponsors

This project is sponsored by my [GitHub sponsors](https://github.com/sponsors/tj):

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