https://github.com/nabil6391/opus_caf_converter
Go code to convert Opus files to Apple's CAF for seamless iOS and safari integration—losslessly & effortlessly.
https://github.com/nabil6391/opus_caf_converter
Last synced: 3 months ago
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Go code to convert Opus files to Apple's CAF for seamless iOS and safari integration—losslessly & effortlessly.
- Host: GitHub
- URL: https://github.com/nabil6391/opus_caf_converter
- Owner: nabil6391
- License: mit
- Created: 2023-02-03T09:12:18.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2024-06-28T08:15:56.000Z (over 1 year ago)
- Last Synced: 2025-01-01T04:32:30.335Z (10 months ago)
- Language: Go
- Homepage:
- Size: 13.4 MB
- Stars: 2
- Watchers: 1
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Opus to CAF Converter
This repository provides a Go package for converting Opus audio files to Core Audio Format (CAF) files. The Opus codec is known for high-quality, low-latency audio compression, while the Core Audio Format is a container format developed by Apple for use with their Core Audio framework.
## Significance
This converter is particularly important because Apple does not natively support the Opus codec in its ecosystem. This limitation necessitates the conversion of Opus files to a format that Apple's platforms can readily use, such as CAF.
### Advantages of Opus
Opus is a highly efficient audio codec that can significantly reduce file sizes compared to other formats:
- Opus files are typically about half the size of MP3 files at equivalent quality
- This size reduction is achieved without compromising audio fidelity
### Efficient Conversion
A key feature of this converter is its ability to perform the Opus to CAF conversion:
- Without relying on external tools like FFmpeg
- While maintaining the original audio quality (lossless conversion)
- Directly in Go, making it easy to integrate into existing Go projects
## Installation
To install the package, use the following command:
```sh
go get github.com/nabil6391/opus_caf_converter
```
## Usage
### As a Package
Import the package in your Go code:
```go
import "github.com/nabil6391/opus_caf_converter/caf"
```
Use the `ConvertOpusToCaf` function:
```go
func main() {
inputOpus := "path/to/input.opus"
outputCaf := "path/to/output.caf"
err := caf.ConvertOpusToCaf(inputOpus, outputCaf)
if err != nil {
log.Fatalf("Conversion failed: %v", err)
}
fmt.Println("Conversion successful!")
}
```
### As a CLI Tool
You can also use this converter as a command-line tool:
1. Install the CLI tool:
```sh
go install github.com/nabil6391/opus_caf_converter@latest
```
2. Run the converter:
```sh
opus_caf_converter input.opus output.caf
```
## Features
- Supports conversion of Opus files to CAF format
- Handles both mono and stereo audio channels
- Preserves audio quality during conversion (lossless conversion)
- Efficient processing of large files
- No dependency on external tools like FFmpeg
## Implementation Details
The conversion process involves several steps:
1. Parsing the Opus file structure
2. Extracting audio data and metadata
3. Constructing the CAF file with appropriate headers and chunks
4. Writing the converted data to the output file
## Testing
The package includes a comprehensive test suite. Run the tests using:
```sh
go test ./...
```
## Limitations
- Currently supports only mono and stereo audio channels
- Does not support all possible Opus configurations
## Contributing
Contributions are welcome! Please feel free to submit a Pull Request.
## License
This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
## Acknowledgments
- The Opus codec developers
- Apple's Core Audio Format documentation
For more detailed information about the implementation, please refer to the source code and comments within the package.