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Auto-Merging Videos ​

What is Auto-Merging Video? ​

When you enable the auto-merging video feature, the system will automatically combine the downloaded silent video files and audio files, ultimately providing you with a complete video file.

Why Do We Need Auto-Merging Video? ​

Modern Video Technology Background ​

With the development of network technology, most social platforms (such as Facebook, YouTube, etc.) now use "separated streaming" technology to play videos. This technology has the following characteristics:

  • Audio Priority Loading: Prioritizes audio content loading when the network is slow
  • Background Playback Optimization: Supports loading only audio streams during background playback
  • Bandwidth Saving: Dynamically adjusts video quality based on network conditions

Limitations of Traditional Download Methods ​

To download a complete high-quality video, you typically need to:

  1. Download high-definition video files (silent)
  2. Download audio files
  3. Manually merge them using desktop software (such as FFmpeg)

This requires users to:

  • Install additional software
  • Learn to use command-line tools
  • Have certain technical knowledge

Our Solution ​

WebAssembly-Based Technology ​

Our auto-merging video feature uses ffmpeg.wasm, which is a WebAssembly-based version of FFmpeg:

  • No Software Installation Required: All operations are completed in the browser
  • No Technical Knowledge Needed: One-click merging with simple operation
  • Safe and Reliable: Runs in a browser sandbox environment

How It Works ​

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Security Information ​

Sandbox Environment ​

  • ffmpeg.wasm runs in the browser's sandbox environment
  • Uses fault isolation technology to isolate from the host system
  • Cannot access your local file system

Privacy Protection ​

  • All processing is completed locally in the browser
  • Your files are not uploaded to any server
  • Complies with WebAssembly security standards

For more security information, please refer to: WebAssembly Security Documentation

Usage Limitations ​

File Size Limitations ​

Due to running in the browser, there are the following limitations:

  • Memory Limitations: Restricted by browser memory allocation
  • Recommended File Size: Files smaller than 1GB work best
  • Browser Differences: Different browsers have different memory limits

Browser Compatibility ​

  • Chrome/Edge: Good support
  • Firefox: Good support
  • Safari: May have compatibility issues

Usage Recommendations ​

  1. Close Other Tabs: Free up more memory for the merging process
  2. Be Patient: Large file merging may take a long time
  3. Stable Network: Ensure stable network connection during download