screencastgen

Concatenator

Merges individual audio chunk files into a single output file.

Source: screencastgen/concatenator.py

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Function

concatenate(output_dir, dest, ext, files) -> str

Merges audio_chunk_*.{ext} files into a single output file.

Strategy:

1. Tries pydub (preferred — handles format conversion)
2. Falls back to ffmpeg CLI if pydub is unavailable

Parameters:

Param	Type	Description
output_dir	str	Directory containing chunk files
dest	str	Output file path
ext	str	Audio extension (wav, mp3)
files	List[str]	Ordered list of chunk file paths

Returns: Path to the merged output file.

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Dependencies

Concatenator
├── pydub         (preferred, deferred import)
├── ffmpeg CLI    (fallback)
└──▶ consumed by Audio Pipeline

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See Also

• Audio Pipeline — Calls concatenate as final step
• Constants — CHUNK_FILE_PATTERN for file naming

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