Fixing undefined Paths in Video Generation with FFmpeg and Node.js

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Troubleshooting undefined Paths When Generating Videos with FFmpeg

The Problem

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The Solution

To tackle this issue, we need to modify the generateVideo function to correctly handle asynchronous operations using Promises. This change will allow us to properly retrieve the video path once the FFmpeg process completes. Here’s the rewritten implementation:

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Key Changes Explained

Returning a Promise: We wrap the logic inside a new Promise. This allows the calling function to wait for the completion of the FFmpeg process.

Resolving the Promise: Once the child process is finished, we call resolve(video) to send the video path back to the calling function.

Error Handling: We also added a way to reject the Promise in case the FFmpeg process encounters an error. This enhances the reliability of your code.

Integration with Express

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Highlights of the Express Integration:

We use async/await to handle asynchronous calls in our Express route.

We employ a try/catch block to handle any potential errors that may arise during video generation, ensuring a smooth user experience.

Conclusion

By wrapping the FFmpeg process logic in a Promise, we've successfully resolved the issue of receiving an undefined path when generating videos. This solution not only fixes the problem but also provides clearer error handling and more reliable asynchronous behavior.