mpv-boxtowide

This script detects if a video has a 4:3 aspect ratio and automatically adjusts it to 16:9 (wide).

It is designed for libraries with older 4:3 content, stretching them to 16:9 without manual intervention. The script aligns with my preference for a simple mpv configuration to fit this straightforward use case.

Options

To adjust options, simply change the values inside local options within the script.

local options = {
    -- target aspect ratio for conversion
    target_ratio = "16:9",

    -- usually 4:3 would only need 1.3333
    -- many old videos use weird ratios, this min/max range covers most of them
    min_ratio = 1.28,
    max_ratio = 1.39,

    -- file extensions the script will do a ratio check on
    video_exts = {
        "3g2", "3gp", "asf", "avi", "f4v", "flv", "m2t", "m2ts", "m4v", "mj2", 
        "mkv", "mov", "mp4", "mpeg", "mpe", "mpg", "mts", "ogv", "rmvb", "ts", 
        "webm", "wmv", "y4m"
    },

    -- regex to detect urls (for ytdl videos)
    url_pattern = "^%a+://",
}

How to install

Simply place boxtowide.lua in the corresponding mpv scripts location of your operating system:

• Windows: %APPDATA%\mpv\scripts\ or C:\users\USERNAME\AppData\Roaming\mpv\scripts\
• Linux: ~/.config/mpv/scripts/ or /home/USERNAME/.config/mpv/scripts/
• Mac: ~/.config/mpv/scripts/ or /Users/USERNAME/.config/mpv/scripts/

Note

More information about files locations can be found here

config/mpv
│   input.conf
│   mpv.conf
│
└───scripts
        boxtowide.lua