Add messages for exceptions

[ZillaRU]

Bug: For many devices holding a customized version of FFmpeg, the commands in run_ffmpeg and detect_fps might fail to be executed in silence.

Solution: Add some info messages to the two functions.

Summary by Sourcery

Enhance error handling in run_ffmpeg and detect_fps functions by adding informative messages. Update README.md with minor corrections and additional information about the experimental branch. Clean up unused camera selection code in the UI module.

Enhancements:

• Add informative messages to run_ffmpeg and detect_fps functions to notify users when commands fail.

Documentation:

• Update README.md to correct a typo and add a section about the experimental branch for latest features.

Chores:

• Remove unused camera selection code from create_root and webcam_preview functions in modules/ui.py.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request makes several changes to improve error handling, simplify the webcam preview functionality, update the README, and modify the UI. The main focus is on adding error messages for FFmpeg-related exceptions and simplifying the camera selection process.

File-Level Changes

Files	Changes
modules/utilities.py	Added error messages for FFmpeg and FFprobe command failures
modules/ui.py	Simplified webcam preview functionality by removing camera selection feature
README.md	Updated README with information about the experimental branch and modified credits
modules/ui.py	Removed camera selection UI elements and related functions

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[sourcery-ai]

Hey @ZillaRU - I've reviewed your changes - here's some feedback:

Overall Comments:

• The removal of the camera selection feature reduces functionality. Consider keeping this feature or providing a justification for its removal.
• Error handling for webcam initialization has been removed from the webcam_preview function. Please add appropriate error checking to ensure robust behavior.
• In the README, consider moving the credit for the original author (s0md3v) to the main credits section rather than a footnote for proper acknowledgement.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟡 Documentation: 1 issue found

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[sourcery-ai]

issue (documentation): Change 'Foot Note' to 'Footnote'.