v1.0.3

Changelog: multi-nvenc-use Branch

New Features

• Multi-GPU NVENC support - Added threading for parallel video encoding
• Smart split point analysis - New function to find optimal keyframe-aligned split points for parallel encoding
• Progress tracker - New class for real-time progress monitoring across parallel encoding streams

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Changes

• Simplified format_size() and get_video_info() functions
• Extended clean_log_file() to support custom prefixes for multi-instance log cleanup
• Replaced run_ffmpeg_pass() with monitor_process() for threaded progress tracking
• Removed verbose docstrings and inline comments
• Added json and threading module imports
• Removed unused Union type import