Mpeg-convert

Changelog

* Added `--version` flag
* Added file exists check
* Added custom argument parsing
* Improved help text
* Improved error handling
* Improved install.sh script
* Fixed customization link in script
* Fixed `h264videotoolbox` and `hevc_videotoolbox` set as default
* Removed`argparse` parsing
* Other bug fixes and minor enhancements

Use `install.sh` below for a quick and dirty way of installing everything (Linux/macOS only)

* Minor patches and enhancements

* Minor patches and enhancements

- Added customization options

Use `install.sh` below for a quick and dirty way of installing everything (Linux/macOS only)

- Added conversion summary
- Added ability for specifying custom ffmpeg options
- Refactored script for easier readability + maintainability

Use `install.sh` below for a quick and dirty way of installing everything (Linux/macOS only)

* Added support for converting audio files
* Added support for showing multiple streams in metadata
* Increased verbosity and response to user
* Minor enhancements and bug fixes

Use `install.sh` below for a quick and dirty way of installing everything (Linux/macOS only)