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Implemented an interactive retry mechanism that is triggered when the output video is larger than the original file. resolution and Constant Rate Factor (CRF) have been made adjustable within this retry workflow.
Introduced a ValidResolutions array in the Globals component.
Refactoring
Conversion Process Configuration Improvements
Simplified the input stream type to IList<IStream> from IEnumerable<IStream> which eliminates unnecessary conversion to a list within the method.
Resolved improper usage of output file extensions for VP9 & AV1 codecs.
For AV1, switched color space from yuv420 to yuv420p10le. (It's a common practice to use 420p10le for AV1.)
Parsing Simplification
Simplified start and end time parsing.
RootCommand Adjustments
Now uses Globals variables to validate resolutions (ValidResolutions) and video codecs (VideoCodecs).
Other Changes
Settings Description Expansion
Enhanced the description by including video codec and resolution information.
Now, the Settings Description includes the available options for resolution and video codec.
- Now we take `IList<IStream>` instead of `IEnumerable<IStream>`, eliminating the need to convert to a list within the method
- Fix inappopriate usage of output file extension for VP9 & AV1
- AV1 using `yuv420p10le` instead of `yuv420`
- Implement an interactive retry mechanism that activates when output video is larger than the original
- Make resolution and Constant Rate Factor (CRF) adjustable within the retry workflow
- Include user prompts to enter custom resolution and CRF values during retries
🎯 Main theme: Implementing an adaptive retry mechanism for video compression and refactoring code for better performance and readability.
📝 PR summary: This PR introduces an adaptive retry mechanism that triggers when the output video is larger than the original file. It also includes significant refactoring, such as simplifying the input stream type, improving the conversion process configuration, and simplifying parsing. The PR also expands the settings description to include video codec and resolution information.
📌 Type of PR: Enhancement
🧪 Relevant tests added: No
⏱️ Estimated effort to review [1-5]: 4, because the PR includes significant changes in the logic of the video conversion process, which requires a deep understanding of the codebase and the video conversion process.
🔒 Security concerns: No security concerns found
PR Feedback
💡 General suggestions: The PR is well-structured and includes a good amount of refactoring, which improves the code's readability and performance. The adaptive retry mechanism is a valuable addition, as it can help to ensure the quality of the output video. However, it would be beneficial to include unit tests to verify the new logic and changes. Also, it would be helpful to handle exceptions more specifically rather than catching the general Exception, which can make debugging easier.
🤖 Code feedback:
relevant file
CommandLineApp/Conversion/Converter.cs
suggestion
Consider handling exceptions more specifically. Instead of catching the general Exception, catch the specific exceptions that you expect might be thrown (e.g., IOException, ArgumentException). This can make debugging easier and can also prevent catching unexpected exceptions that might be better not caught. [important]
It seems that the HandleCancellation method is attached to the Console.CancelKeyPress event every time the while loop runs. This could lead to multiple event handlers being attached if the while loop runs more than once. Consider attaching the event handler outside of the while loop to avoid this. [important]
The ShouldRetry method seems to be doing a lot of things, including asking for user input and deleting files. Consider breaking this method down into smaller, more focused methods to improve readability and maintainability. [medium]
The ChangeCrfValue method currently uses a while loop to repeatedly ask for user input until a valid input is provided. Consider adding a limit to the number of attempts to prevent an infinite loop if the user keeps providing invalid input. [medium]
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4, because the PR introduces significant changes across multiple files, including new features, refactoring, and adjustments to existing functionality. The complexity of the adaptive retry mechanism, changes to the conversion process, and the use of global variables for validation require careful review to ensure correctness and maintainability.
🧪 Relevant tests
No
🔍 Possible issues
The retry mechanism could lead to an infinite loop if the conditions for retry (compressedSize > originalSize) persist after adjustments.
Parsing of CRF values does not handle non-numeric input gracefully, potentially causing an unhandled exception.
The deletion of the converted video file is not confirmed before proceeding, which might lead to accidental data loss.
The change in pixel format for AV1 codec to 'yuv420p10le' without a corresponding change in the output file extension could lead to compatibility issues with some players.
🔒 Security concerns
No
Code feedback:
relevant file
CommandLineApp/Conversion/Converter.cs
suggestion
Consider implementing a maximum retry limit for the adaptive retry mechanism to prevent potential infinite loops. This could be a fixed number or based on user input. [important]
Validate the CRF input to ensure it is a numeric value before attempting to parse and use it in the conversion settings. This prevents potential runtime errors from non-numeric input. [important]
Before deleting the converted video file, ensure that the user's intent is confirmed to prevent accidental data loss. This could involve a more explicit confirmation step or warning. [medium]
For AV1 codec conversions, ensure the output file extension reflects the change in pixel format to 'yuv420p10le'. This might involve adding a conditional check to set the appropriate file extension. [medium]
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Edit this field to enable/disable the tool, or to change the used configurations
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The review tool can auto-generate two specific types of labels for a PR:
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Features
Adaptive Retry Mechanism for Compression
ValidResolutionsarray in theGlobalscomponent.Refactoring
Conversion Process Configuration Improvements
IList<IStream>fromIEnumerable<IStream>which eliminates unnecessary conversion to a list within the method.yuv420toyuv420p10le. (It's a common practice to use 420p10le for AV1.)Parsing Simplification
RootCommand Adjustments
Globalsvariables to validate resolutions (ValidResolutions) and video codecs (VideoCodecs).Other Changes
Settings Description Expansion