Support .txt files as a line-by-line media list rather than streams

[democat3457]

#8517 (comment)

Reads .txt files as lists of media to support multiple media in sequence. Uses the .streams file extension in place of .txt for lists of streams and rtsp.streams as the default streams file, as suggested.

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Upgraded input handling for YOLOv5 to allow lists of images and streams from text files.

📊 Key Changes

• 📁 Added support for list.txt files to specify lists of images to be processed.
• 🌐 Added support for list.streams files for defining lists of stream URLs.
• 🛠️ Adapted webcam detection logic to recognize .streams file extension.
• 🔄 Modified LoadImages and LoadStreams classes to handle new .txt and .streams file types.
• 📝 Updated README.md and help strings in scripts to document new features.

🎯 Purpose & Impact

• 🚀 Streamlines batch processing by allowing users to load multiple images or streams from a single text file.
• 🌍 Widens accessibility for users needing to process a large number of files or streams without specifying them individually.
• 💡 Enhances the existing functionality to align with user workflows that involve bulk operations, potentially saving time and effort.

[glenn-jocher]

@democat3457 this is great, thanks for the PR! I've added a TODO to prioritize a review this week.

[glenn-jocher]

@democat3457 PR is merged. Thank you for your contributions to YOLOv5 🚀 and Vision AI ⭐