Improved video generation , performance and quality

[overcrash66]

This pull request introduces several enhancements and fixes across multiple files, focusing on improving error handling, refining video streaming and downloading functionality, and adding utility updates. Below is a summary of the most important changes grouped by theme.

Error Handling Improvements:

• Improved error handling in the stream_video function to validate file existence, ensure range values are within valid bounds, and handle parsing errors gracefully.
• Enhanced the download_video function to check file existence, readability, and determine appropriate media types dynamically, with detailed logging for errors.

Video Streaming and Downloading Enhancements:

• Fixed a bug in the get_task function by correcting a variable name (v to file) for generating URI paths.
• Updated stream_video to handle partial content requests more robustly by ensuring valid byte ranges and fallback behavior for invalid ranges.

Dependency and Configuration Updates:

• Added Query import in app/controllers/v1/video.py to support query parameters in API endpoints.
• Introduced conditional Redis URL construction based on the presence of a password in the configuration.

Utility and Code Cleanups:

• Removed an unused Query import from the create_task function.

Script Enhancements:

• Modified webui.bat to activate a Python virtual environment if it exists and added optional Hugging Face mirror settings.

Improve video Quality and performance:

• Advanced Encoding Parameter
• Enhanced FFmpeg Configuration
• Memory Management Improvements
• Two-Pass Encoding (non-Windows)
• Advanced Image Processing
• Performance Optimizations (Adaptive thread count)
• Resolution and Dimension Handling

Manual tests:

Tested only on windows 10 , with python 3.10

[19Elkhunter99]

I have always wanted to learn and see how you were able to do this. I want to know how you were able to improve video generations.