# Get-VideoAudio.ps1

Extracts audio in either WAV or MP3 format from a video file.

## Parameters

- **`-Video`** (required): Path to input video file (absolute or relative)
- **`-Output`** (optional): Path to output audio file (defaults to video filename with `.wav` or `.mp3` extension)
- **`-MP3`**: Extract audio as MP3 at 320 kbps instead of WAV

## Examples

**Extract audio as WAV (default):**

```powershell
.\Get-VideoAudio.ps1 -Video video.mp4
# Creates video.wav in the same directory
```

**Extract audio as MP3:**

```powershell
.\Get-VideoAudio.ps1 -Video video.mp4 -MP3
# Creates video.mp3 in the same directory
```

**Specify custom output path:**

```powershell
.\Get-VideoAudio.ps1 -Video video.mp4 -Output audio\soundtrack.wav
```

**Extract MP3 with custom output:**

```powershell
.\Get-VideoAudio.ps1 -Video video.mp4 -Output music.mp3 -MP3
```

**Using absolute paths:**

```powershell
.\Get-VideoAudio.ps1 -Video "C:\Videos\movie.mp4" -Output "D:\Audio\soundtrack.mp3" -MP3
```

**Using relative paths:**

```powershell
.\Get-VideoAudio.ps1 -Video ..\videos\clip.mp4 -Output .\audio\clip.wav
```

## Behavior

- If the video file has no audio stream, the script displays a message and exits without creating an output file
- WAV format uses PCM 16-bit encoding (lossless)
- MP3 format uses 320 kbps bitrate (highest quality)
- If output file already exists, it will be overwritten

## Safe Execution

This script supports `-WhatIf` and `-Confirm` for safe execution:

- **`-WhatIf`**: Simulate the operation without actually creating files. Shows what would be done.
- **`-Confirm`**: Prompt for confirmation before extracting audio.

**Simulate without making changes:**

```powershell
.\Get-VideoAudio.ps1 -Video video.mp4 -MP3 -WhatIf
```

**Prompt before extracting:**

```powershell
.\Get-VideoAudio.ps1 -Video video.mp4 -Output soundtrack.wav -Confirm
```

## Notes

Requires `ffmpeg` and `ffprobe` to be installed and available in the system PATH.