MP4 to AVI Converter

MP4 to AVI Converter | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Media
Input types: file, select, number
Output type: file
Sample coverage: 4
API ready: Yes

Overview

Easily convert your MP4 video files to the AVI container format while maintaining high-quality video and audio. This online converter supports direct stream copying for lossless container swapping, as well as advanced re-encoding options using H.264, H.265, or MPEG-4 video codecs and MP3, AC3, or AAC audio codecs.

When to use

When you need to play video files on legacy media players or hardware devices that only support the AVI container.
When you want to change the container from MP4 to AVI without re-encoding the underlying video and audio streams to save time and preserve quality.
When you need to transcode an MP4 video to specific legacy codecs like MS MPEG-4 or DivX for compatibility with older editing software.

How it works

1Upload your MP4 or M4V video file up to the 500MB limit.
2Choose your preferred video and audio codecs, or select 'Copy' to change the container without re-encoding.
3Adjust the CRF quality value if you are re-encoding the video stream.
4Click convert to process the file and download your finished AVI video.

Use cases

Converting modern H.264 MP4 videos to AVI format for playback on older standalone DVD players or car entertainment systems.
Remuxing MP4 files to AVI containers instantly by copying the video and audio streams without CPU-heavy transcoding.
Compressing and transcoding high-definition MP4 videos using H.265 or MPEG-4 codecs with custom CRF quality control.

Examples

1. Lossless Container Swap (Remuxing)

Video Archivist

Background

A video archivist has a collection of MP4 videos that need to be stored in AVI containers for compatibility with an older database system, but they cannot afford any loss in video or audio quality.

Problem

Changing the file container from MP4 to AVI without triggering a lossy re-compression process.

How to use

Upload the MP4 file, select 'Copy (No Re-encoding)' for both the Video Codec and Audio Codec options, and run the conversion.

Video Codec: copy, Audio Codec: copy

Outcome

The video is instantly converted to an AVI file with identical video and audio streams, preserving 100% of the original quality.

2. Legacy Device Compatibility Transcoding

Multimedia Hobbyist

Background

A hobbyist wants to play a modern MP4 video on a legacy media player that only supports AVI files encoded with the MPEG-4 video codec and MP3 audio.

Problem

The original MP4 uses codecs that the legacy player cannot decode.

How to use

Upload the MP4 video, select 'MPEG-4' as the Video Codec, 'MP3' as the Audio Codec, and set the CRF Quality to 22.

FAQ

Can I convert MP4 to AVI without losing quality?

Yes, by setting both the video and audio codecs to 'Copy (No Re-encoding)', the streams are transferred directly into the AVI container without quality loss.

What is the maximum file size supported?

You can upload and convert MP4 video files up to 500 MB in size.

Which video codecs are supported for re-encoding?

The converter supports H.264, H.265/HEVC, MPEG-4, MS MPEG-4 V2, and MS MPEG-4 V3 (DivX).

What does the CRF quality setting do?

The Constant Rate Factor (CRF) controls video quality during re-encoding, where a lower value (between 18 and 28) yields higher quality but larger file sizes.

Can I convert M4V files?

Yes, the tool accepts both standard MP4 and M4V video formats as inputs.

Video Codec: mpeg4, Audio Codec: mp3, CRF Quality: 22

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Lossless Container Swap (Remuxing)

2. Legacy Device Compatibility Transcoding

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