avidemux_shaders/README.md

# Avidemux Shaders

Shaders for Avidemux with OpenGL support

## GoPro fisheye removal

![Sample image](https://blog.rozk.net/wp-content/uploads/2025/07/compare.png)

### gopro_8:7 - Fisheye removal for GoPro 11+, 8:7 ratio, 60fps, HyperSmooth off

- unfish_gopro_8:7.glsl  
Shader for fisheye removal

- preset_gopro_8:7_4K_youtube.py  
Preset for mp4, 4K, high bitrate

- preset_gopro_8:7_4K_2160p.py  
Preset for mp4, 4K, constant bitrate

- preset_gopro_8:7_FullHD_1080p.py  
Preset for mp4, FullHD, constant bitrate

- preset_gopro_8:7_HD_720p.py  
Preset for mp4, HD, constant bitrate

- compute_gopro_8:7.py  
Script to compute output FOV and frame widening

### gopro_4:3_maxlens - Fisheye removal for GoPro 11+, 4:3 ratio, Max SuperView, 60fps, HyperSmooth off

- unfish_gopro_4:3_maxlens.glsl  
Shader for fisheye removal

- preset_gopro_4:3_maxlens_4K_youtube.py  
Preset for mp4, 4K, high bitrate

- preset_gopro_4:3_maxlens_4K_2160p.py  
Preset for mp4, 4K, constant bitrate

- preset_gopro_4:3_maxlens_FullHD_1080p.py  
Preset for mp4, FullHD, constant bitrate

- preset_gopro_4:3_maxlens_HD_720p.py  
Preset for mp4, HD, constant bitrate

- compute_gopro_4:3_maxlens.py  
Script to compute output FOV and frame widening

### Installation for BSD/GNU-Linux systems:

- Copy the presets to ~/.avidemux6/custom/
- Copy the shader to /opt/rk/avidemux/ (or edit the preset to set the path)  

Or just run the scripts install_gopro_8:7.sh and/or install_gopro_4:3_maxlens.sh

_For commercial OS's, figure out the paths yourself, then edit the presets to fix the path to the .glsl files_

### Usage:

- Load and edit video(s)
- Select "Custom/preset_gopro..." in the menu
- Add filters
- Save the video