Free online DIVX to OPUS converter

Source format: DivX

DivX is a video compression format and codec family based on MPEG-4 Part 2. It became popular for distributing movies and TV recordings in relatively small file sizes while keeping decent visual quality. DivX files are commonly found in .avi containers, though the codec can also appear in other containers. It is used mainly for legacy video playback, archiving, and older media devices that support DivX-certified content.

Target format: Opus

Opus is a modern, open, highly efficient audio codec designed for speech and music alike. It offers excellent quality at low bitrates, low latency, and broad support in modern software and web platforms. Opus is commonly used for streaming, voice communication, podcasts, and compact audio storage. If you convert DivX to Opus, you are extracting the audio track from the video and saving it as an Opus audio file, usually in an .opus or .ogg container.

How to perform the conversion

The best approach is to use a tool that can demux or transcode the audio stream from the DivX video. The most reliable desktop tool for this is FFmpeg. If you only need the audio and want the best compatibility and control, FFmpeg is usually the preferred choice.

1. Check the source file. Make sure the DivX video contains an audio track you want to keep. If the file has multiple audio tracks, decide which one should be converted.

2. Install FFmpeg if it is not already available on your system.

3. Convert the audio to Opus with a command such as:

   ffmpeg -i input.avi -c:a libopus -b:a 96k output.opus

   This reads the DivX video from input.avi, encodes the audio with the Opus codec, and writes the result to output.opus.

4. Adjust quality if needed. For speech, -b:a 48k or -b:a 64k may be enough. For music or higher fidelity, -b:a 128k or -b:a 160k is often better.

5. Verify the result by playing the output file in a modern media player such as VLC, foobar2000, or a browser that supports Opus playback.

If you prefer a simpler workflow, you can also convert the file on 101convert.com for free, without installing any software.

Notes on quality, compatibility, and limitations

DivX is a video format, while Opus is audio-only, so this conversion does not preserve the video. It extracts and re-encodes the audio track from the source video.

Because Opus is a lossy codec, the output will not be identical to the original audio. If the source audio is already compressed, converting it again may reduce quality slightly. To minimize quality loss, choose a bitrate appropriate for the content and avoid unnecessary re-encoding when possible.

Compatibility is generally excellent in modern software, but some older hardware players and legacy editors may not support Opus. If you need maximum device compatibility, consider whether another audio format is required.

Also note that some DivX files may contain audio in formats that are not ideal for direct stream copying into an Opus container. In those cases, FFmpeg will re-encode the audio automatically, which is usually the correct behavior for this conversion.