https://github.com/maikmerten/hmp3
Helix MP3 Encoder, with some additions
https://github.com/maikmerten/hmp3
audio encoder mp3 mp3-encoder mpeg
Last synced: 5 months ago
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Helix MP3 Encoder, with some additions
- Host: GitHub
- URL: https://github.com/maikmerten/hmp3
- Owner: maikmerten
- Created: 2022-11-13T17:33:07.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2025-01-11T15:14:44.000Z (5 months ago)
- Last Synced: 2025-01-11T16:26:14.045Z (5 months ago)
- Topics: audio, encoder, mp3, mp3-encoder, mpeg
- Language: C++
- Homepage:
- Size: 353 KB
- Stars: 19
- Watchers: 6
- Forks: 5
- Open Issues: 1
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Metadata Files:
- Readme: README.md
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README
# hmp3 - Helix MP3 Encoder, with some additions
This repository contains a version of the Helix MP3 Encoder with some maintenance work applied to build on modern systems. This targets mostly Linux-based machines (tested on x86-64 and ARM), but project files for Visual Studio 2015 are also included.
## On the license of the Helix MP3 Encoder
This repository contains a source code copy of the Helix MP3 Encoder in the directory [./hmp3](./hmp3). Please study [./hmp3/LICENSE.txt](./hmp3/LICENSE.txt) for licensing information.
## On the license of other files in this repository
Files in this repository outside of the [./hmp3](./hmp3) directory are licensed under the terms of the MIT License, unless noted otherwise.
## Compiling
A Makefile tested on Linux is provided in this directory. With the usual build systems installed, a simple `make` should create a `hmp3` program binary in `builds/release`, along with compiled object files.
A binary with debug symbols can be generated with `make debug`.
## Documentation
The encoder is documented over at the [HydrogenAudio Wiki page of the Helix MP3 encoder](https://wiki.hydrogenaud.io/index.php?title=Helix_MP3_Encoder).
## Use examples
* Create a ~128 kbps VBR MP3 file:
`hmp3 input.wav output.mp3`
* Create a 128 kbps CBR MP3 file:
`hmp3 input.wav output.mp3 -B64`
(Note that `-B` denotes the bitrate **per channel**, thus stereo input files are being encoded with 128 kbps.)
* Create a ~185 kbps VBR MP3 file, encode frequencies above 16 kHz, with a highpass filter of 19 kHz applied:
`hmp3 input.wav output.mp3 -V100 -HF2 -F19000`