Skill

split-video

Split a wide (3840x1080) side-by-side video into separate screen and camera files using ffmpeg. Use when the user says "split this file" or wants to split a wide video recording.

npx claudepluginhub czue/agent-tools --plugin agent-tools

Tool Access

This skill is limited to using the following tools:

Bash(ffmpeg*)Bash(ffprobe*)GlobAskUserQuestion

Preview

Splits a 3840x1080 side-by-side video into two 1920x1080 files: one for the screen capture (left half) and one for the camera (right half).

SKILL.md

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Split Wide Video

Splits a 3840x1080 side-by-side video into two 1920x1080 files: one for the screen capture (left half) and one for the camera (right half).

Arguments

$0: (optional) path to the video file to split

Workflow

Resolve the input file:

If $0 is provided, use it.
Otherwise, search for video files (*.mp4, *.mkv, *.mov, *.avi) in these directories in order:
1. The current working directory
2. ~/ (home directory)
3. ~/Videos/
If exactly one video file is found across all searched directories, confirm with the user that it's the right one.
If multiple video files are found, use AskUserQuestion to ask which file to split.
If no video files are found in any of those locations, use AskUserQuestion to ask for the file path.

Verify the video dimensions using ffprobe:

ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=p=0 "<input_file>"

Expected: 3840x1080 (or similar wide format where width is ~2x height).
If dimensions don't match, warn the user and ask if they want to proceed anyway.

Split the video into two files:

Screen capture (left half):

ffmpeg -i "<input_file>" -filter:v "crop=1920:1080:0:0" -c:v libx264 -crf 18 -preset fast -c:a aac -b:a 192k "<base>-screen.mp4"

Camera (right half):

ffmpeg -i "<input_file>" -filter:v "crop=1920:1080:1920:0" -c:v libx264 -crf 18 -preset fast -c:a aac -b:a 192k "<base>-cam.mp4"

Where <base> is the input filename without its extension.

Report results: Tell the user the names of the two output files created.

Split Wide Video

Splits a 3840x1080 side-by-side video into two 1920x1080 files: one for the screen capture (left half) and one for the camera (right half).

Arguments

$0: (optional) path to the video file to split

Workflow

Resolve the input file:
- If $0 is provided, use it.
- Otherwise, search for video files (*.mp4, *.mkv, *.mov, *.avi) in these directories in order:
  1. The current working directory
  2. ~/ (home directory)
  3. ~/Videos/
- If exactly one video file is found across all searched directories, confirm with the user that it's the right one.
- If multiple video files are found, use AskUserQuestion to ask which file to split.
- If no video files are found in any of those locations, use AskUserQuestion to ask for the file path.
Verify the video dimensions using ffprobe:
```
ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=p=0 "<input_file>"
```
- Expected: 3840x1080 (or similar wide format where width is ~2x height).
- If dimensions don't match, warn the user and ask if they want to proceed anyway.

Split the video into two files:

Screen capture (left half):

ffmpeg -i "<input_file>" -filter:v "crop=1920:1080:0:0" -c:v libx264 -crf 18 -preset fast -c:a aac -b:a 192k "<base>-screen.mp4"

Camera (right half):

ffmpeg -i "<input_file>" -filter:v "crop=1920:1080:1920:0" -c:v libx264 -crf 18 -preset fast -c:a aac -b:a 192k "<base>-cam.mp4"

Where <base> is the input filename without its extension.

Report results: Tell the user the names of the two output files created.