docs: expand README with detailed script documentation

- Add installation section with copy commands
- Document each script with features, requirements, config examples
- Add practical configuration examples for common use cases
- Update CLAUDE.md with shared library documentation
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## Architecture
This repository holds standalone Lua scripts for mpv (0.36+, bundled Lua 5.2). Each script in `scripts/` is self-contained with no external Lua dependencies.
This repository holds Lua scripts for mpv (0.36+, bundled Lua 5.2).
Script structure convention:
1. Header comment block explaining features, requirements, and configuration
@@ -21,6 +21,17 @@ Script structure convention:
3. Note indicating no edits are needed below the config block
4. Implementation code
### Shared Library
`scripts/lib/utils.lua` contains common utilities (trim, clamp, ASS color helpers). Scripts load it via:
```lua
package.path = mp.command_native({ "expand-path", "~~/scripts/lib/?.lua;" }) .. package.path
local lib = require("utils")
```
When adding new shared functions, prefer adding to this module over duplicating code.
## Code Style
- 2-space indentation, 100-column width, double quotes preferred (enforced by stylua)

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README.md
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# mpv-scripts
Small collection of personal mpv Lua scripts. Drop any file from `scripts/` into your `~/.config/mpv/scripts/` to enable it.
Personal collection of Lua scripts for mpv (0.36+).
- `ac-power.lua` — polls Home Assistant for a power sensor and shows wattage in the OSD with debounce/backoff.
- `kb-blackout.lua` — dims or turns off the keyboard backlight while mpv is playing, restores it on pause/idle/unfocus.
- `touch-gestures.lua` — tablet-friendly vertical edge swipes: right edge changes system volume (PipeWire/Pulse), left edge changes screen brightness (brightnessctl), with OSD feedback and bottom exclusion to avoid the OSC.
## Installation
Copy desired scripts from `scripts/` into `~/.config/mpv/scripts/`. Also copy `scripts/lib/` for the shared utilities required by all scripts.
```bash
cp scripts/lib ~/.config/mpv/scripts/ -r
cp scripts/ac-power.lua ~/.config/mpv/scripts/
```
Configuration is done by editing the `config` table at the top of each script.
---
## ac-power.lua
Displays Home Assistant AC power sensor readings with a color-coded gauge, delta indicator, and persistent min/max tracking.
**Display format:** `[████░░░░] 450W +50`
**Features:**
- Polls Home Assistant API for power sensor data
- Visual gauge colored by power level (green → yellow → red)
- Delta indicator showing power change (+/-) colored by trend
- Persistent min/max tracking across sessions (stored in `~/.cache/mpv/`)
- Debounces updates to avoid OSD spam
- Exponential backoff on network failures
**Requirements:**
- Home Assistant instance with a power sensor
- Long-lived access token from HA
- `curl` in PATH
**Configuration:**
```lua
local config = {
-- Home Assistant connection (required)
sensor_id = "sensor.ac_power",
ha_base_url = "http://homeassistant.local:8123",
ha_token = "YOUR_LONG_LIVED_TOKEN",
-- Polling behavior
poll_interval = 3, -- seconds between polls
min_delta_watts = 5, -- minimum change to trigger display
force_refresh_interval = 30, -- force display even if delta small
-- Gauge
show_gauge = true,
gauge_width = 8, -- number of bar segments
gauge_max_watts = 1000, -- scale reference (or uses tracked max)
-- Delta indicator
show_delta = true,
delta_stable_range = 5, -- watts within which shows as stable (white)
-- Min/Max tracking
track_minmax = true,
show_minmax = false, -- show [min-max] inline
persist_minmax = true, -- save to disk across sessions
-- Color thresholds (watts)
color_low_threshold = 200, -- below = green
color_mid_threshold = 500, -- below = yellow
color_high_threshold = 800, -- above = red
}
```
**Script messages:**
- `script-message ac-power-refresh` — force immediate poll
- `script-message ac-power-reset-minmax` — clear min/max history
---
## kb-blackout.lua
Dims or disables the keyboard backlight while mpv is playing, restoring it on pause or when mpv loses focus.
**Features:**
- Captures starting brightness and restores exact value
- Auto-discovers keyboard LED device via `brightnessctl --list`
- Debounces rapid state changes
- Optional restore on window unfocus
**Requirements:**
- Linux
- `brightnessctl` with permission to control LED device
**Configuration:**
```lua
local config = {
timeout_ms = 3000, -- delay before dimming after playback starts
minimum_brightness = 0, -- target brightness (0 = off)
restore_on_pause = true, -- restore when paused
restore_on_unfocus = true, -- restore when mpv loses window focus
debounce_ms = 250, -- ignore rapid state flips
led_path = "", -- auto-detect, or set explicitly e.g. "asus::kbd_backlight"
brightnessctl_path = "brightnessctl",
}
```
**Example — keep minimal glow instead of full off:**
```lua
minimum_brightness = 10, -- 10% brightness while playing
```
---
## playback-health.lua
Monitors playback health and shows OSD warnings only when problems occur (buffering, frame drops, low cache).
**Features:**
- Silent during normal playback
- Detects network streams automatically (cache warnings only for streams)
- Frame drop monitoring for all sources
- Buffer prediction (estimates time to stall/resume)
- Bandwidth monitoring (warns when download can't keep up)
- Color-coded warnings with cooldown to prevent spam
**Configuration:**
```lua
local config = {
-- Thresholds
cache_warning_seconds = 5, -- warn when cache falls below (streams)
cache_critical_seconds = 2, -- critical threshold (red)
drop_rate_threshold = 1.0, -- drops per second to trigger warning
drop_window_seconds = 5, -- time window for measuring drops
-- Display
osd_duration = 3,
show_buffering_percent = true,
show_buffer_prediction = true, -- "stall in 5s" / "resume in 3s"
show_recovery = true, -- "✓ Recovered" message
cooldown_seconds = 10, -- minimum time between same warning type
-- What to monitor
monitor_cache = true,
monitor_drops = true,
monitor_bandwidth = true,
bandwidth_ratio_warn = 0.9, -- warn when download/playback < 90%
}
```
**Example — more sensitive drop detection:**
```lua
drop_rate_threshold = 0.5, -- warn at 0.5 drops/sec instead of 1.0
drop_window_seconds = 3, -- shorter measurement window
```
---
## touch-gestures.lua
Tablet-friendly swipe controls: horizontal swipes seek, vertical edge swipes adjust volume (right) or brightness (left).
**Features:**
- Horizontal swipes anywhere: seek forward/backward
- Right edge vertical swipes: system volume (PipeWire/PulseAudio)
- Left edge vertical swipes: screen brightness (brightnessctl)
- Axis locking prevents accidental cross-axis actions
- Fine-grained steps at low values
- OSD feedback after each adjustment
**Requirements:**
- mpv 0.39+ recommended
- On Wayland: run mpv with `--native-touch=yes`
- `brightnessctl` for brightness control
- `wpctl` (PipeWire) or `pactl` (PulseAudio) for volume
**Configuration:**
```lua
local config = {
-- Sensitivity
steps_per_screen = 40, -- steps across full screen height
deadzone_px = 4, -- ignore tiny movements
-- Step sizes
volume_step = 5, -- percent per step
volume_step_fine = 1, -- step when below fine_threshold
brightness_step = 5,
brightness_step_fine = 1,
fine_threshold = 10, -- use fine steps below this %
seek_step = 5, -- seconds per horizontal step
-- Limits
max_volume = 130,
min_brightness = 1, -- prevent turning off screen
-- Zones (fraction of screen width)
left_zone_ratio = 0.35, -- brightness zone
right_zone_ratio = 0.35, -- volume zone
bottom_exclude_ratio = 0.15, -- ignore bottom (OSC area)
-- Direction
invert_vertical = false,
invert_horizontal = false,
}
```
**Example — larger edge zones for easier targeting:**
```lua
left_zone_ratio = 0.4,
right_zone_ratio = 0.4,
```
**Example — add to mpv.conf for Wayland touch support:**
```
native-touch=yes
```
---
## License
These scripts are provided as-is for personal use.