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Showing content from https://github.com/lunagus/mpv-clipper below:

lunagus/mpv-clipper: mpv script to quickly trim videos using ffmpeg

mpv-clipper is a Lua script for mpv that lets you quickly create clips from videos directly in the player.
It is lossless by default (using copy mode), but also supports quality presets (high, medium, fast, tiny) and a custom mode for advanced control.
You can cycle between presets with a single key (q).

Windows

macOS / Linux

1. Create a scripts/ folder inside your mpv config directory if it doesn't exist.
2. Save mpv-clipper.lua into the scripts/ folder.
3. (Optional) Create a mpv-clipper.conf file in the main mpv config directory to override settings.

Final structure:

~/.config/mpv/
├── scripts/
│   └── mpv-clipper.lua
└── mpv-clipper.conf  (optional)

Make sure FFmpeg is installed and available in your system PATH.

Test with:

1. Load a video in mpv
2. Seek to the desired start time
3. Press c to mark the start
4. Seek to the desired end time
5. Press v to mark the end
6. Press b to create the clip

• Press q to cycle through:
  copy → high → medium → fast → tiny → custom → back to copy

copy mode = lossless passthrough (no re-encoding).
Other presets re-encode with different CRF, preset speed, and audio bitrates.
custom mode uses only what you define in mpv-clipper.conf.

Create or edit mpv-clipper.conf in your mpv config folder.

# Output directory for clips (leave empty for same folder as source)
output_dir="/home/user/clips"

# Default codecs ("copy" = lossless passthrough)
video_codec="copy"
audio_codec="copy"

# Container format (auto=same as input)
container="auto"

# Audio bitrate (used if audio is re-encoded)
audio_bitrate="192k"

# Optional CRF & preset (only used if re-encoding video)
crf=""
preset=""

# Optional scaling (e.g., "1280:-1")
scale=""

# Clip filename suffix
clip_suffix="-clip"

# OSD duration in ms
osd_duration=1500

# Show debug logs in console
show_logs=false

# Default quality mode
# Options: copy, high, medium, fast, tiny, custom
quality="copy"

1. mpv video.mp4
2. Press `c` at 00:05:10
3. Press `v` at 00:06:30
4. Press `b` → Outputs lossless clip in same format as source

1. Press `q` until "medium" appears in OSD
2. Set start/end with `c` and `v`
3. Press `b` → Outputs re-encoded clip (CRF 20, medium preset, 128k audio)

• Ensure mpv-clipper.lua is in scripts/
• Verify mpv is reading from correct config directory
• Press ~ to open console and check for [mpv-clipper] messages

• FFmpeg not found? Install and add to PATH
• Output directory not writable? Adjust output_dir
• Network streams may not be supported

• Check for conflicts in other scripts
• Edit bindings directly in Lua file if needed
• Test with mpv --input-test

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