Free online DIVX to AAC converter

Source format: DivX

DivX is a video compression format and codec family based on MPEG-4 Part 2. It is commonly found in .avi or .divx files and was widely used for distributing movies and TV recordings with relatively small file sizes. DivX files usually contain both video and audio, so when people say they want to convert DivX to AAC, they usually mean they want to extract the audio track from a DivX video and save it as an AAC audio file.

DivX content is still encountered in older video archives, DVD rips, and legacy media collections. It is used by people who need to play or edit older compressed video files, or who want to reuse the audio separately.

Target format: AAC

AAC (Advanced Audio Coding) is a modern, efficient audio-only format designed to deliver good sound quality at relatively low bitrates. It is widely supported by smartphones, media players, streaming platforms, and editing software. AAC is commonly stored in .m4a, .aac, or inside MP4 containers.

Its main advantages are small file size, good quality at lower bitrates, and broad compatibility with consumer devices and software. AAC is a strong choice for music, podcasts, voice recordings, and extracted audio from video files.

How to perform the conversion

The best method is to use a desktop converter or media tool that can demux or re-encode the audio track from the DivX video into AAC. If you only need the audio and want to preserve quality as much as possible, choose a tool that can copy or extract the audio stream when it is already AAC-compatible; otherwise, it will re-encode it to AAC.

Using VLC Media Player

1. Open VLC and go to Media → Convert / Save.
2. Click Add and select the DivX video file.
3. Click Convert / Save.
4. In Profile, choose an AAC-capable audio profile or create a custom profile with AAC audio.
5. Set the destination filename with an .aac or .m4a extension.
6. Start the conversion.

Using FFmpeg

FFmpeg is often the most reliable choice for this task. If the source audio is already suitable and you want to extract it without unnecessary quality loss, use:

ffmpeg -i input.divx -vn -c:a aac output.m4a

This removes the video stream with -vn and encodes the audio to AAC. If you want a raw AAC file, you can use output.aac instead, but .m4a is often more compatible for AAC audio.

Using HandBrake

1. Open the DivX file in HandBrake.
2. Go to the Audio tab.
3. Select the audio track you want to keep.
4. Set the codec to AAC.
5. Choose an output filename such as output.m4a.
6. Click Start Encode.

You can also convert the file on 101convert.com for free, without installing any software.

Notes on quality, compatibility, or limitations

DivX to AAC is usually an audio extraction or audio re-encoding task, not a full video conversion. If the DivX file contains multiple audio tracks, make sure you select the correct one before converting.

If the original audio is already compressed, converting it again to AAC may cause a small quality loss because of re-encoding. For best results, use the highest reasonable AAC bitrate, such as 192 kbps or 256 kbps, especially for music or high-quality speech.

Compatibility is generally best with .m4a when saving AAC audio for phones, players, and editors. A raw .aac file is also valid, but some apps prefer the M4A container. If the source DivX file is damaged or uses an uncommon audio codec, the conversion may fail or produce silence until the source is repaired or decoded correctly.