This commit introduces a new module `logging_config.py` that implements a singleton pattern for logging configuration. The logger is initialized only once and can be configured based on an environment variable to log to a file or to the console. This centralizes logging setup and ensures consistent logging behavior throughout the application.
- Implemented a new service to convert AVI files to MKV format while preserving metadata.
- Added methods for validating AVI files, detecting subtitle files, and mapping audio languages.
- Built ffmpeg command for fast remuxing without re-encoding.
- Included error handling and logging for conversion processes.
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