AU to AVI — Format Comparison & Online Converter
Fast, instant AU to AVI conversion. No signup required. Just drop your .au file and get .avi in seconds.
Batch Settings
About AU to AVI Conversion
AU and AVI (introduced 1992) are both audio formats, but they differ in important ways. AU is a widely used file format. AVI (Audio Video Interleave) is Microsoft's legacy video container, widely compatible but often large.
When you convert AU to AVI, the goal is to convert between formats quickly. Converting AU to AVI maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your AU file is decoded and re-encoded as AVI. The conversion involves 4 steps: (1) your au file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in avi format, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you need a AVI file. For the opposite direction, CocoConvert also supports AVI to AU conversion.
How to Convert AU to AVI
- 1
Upload .au file
Select your AU file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .avi
Set AVI as the output format. The converter uses optimal settings based on the AU→AVI conversion profile.
- 3
Convert
The server-side engine decodes your AU file and re-encodes it as AVI. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .avi file. Multiple output files can be downloaded together.
What Happens When You Convert AU to AVI
Your AU file is decoded and re-encoded as AVI.
Your AU file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in AVI format
The converted file is ready for download
Format Comparison
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
AVI
.avi file
| Extension | .avi |
| MIME Type | video/x-msvideo |
| Category | Audio |
Should You Convert AU to AVI?
When to Convert
- ✓When you need a AVI file
Frequently Asked Questions
What is the difference between AU and AVI?
AU is a widely used file format. AVI (Audio Video Interleave) is Microsoft's legacy video container, widely compatible but often large.
Does AU to AVI conversion affect quality?
Converting AU to AVI maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, AU or AVI?
AU is a common audio format. AVI uses lossy compression. The better choice depends on whether you prioritize file size or quality.
How long does AU to AVI conversion take?
Most conversions finish in seconds. Larger files or complex audio content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is AU or AVI better for long-term storage?
Both formats use lossy compression, so consider keeping your original source file for long-term storage.
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