M2V to SOU Converter

Get SOU audio from M2V videos in your browser for free

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Clean Audio Output

The SOU audio extracted from your M2V video preserves the original sound quality. Adjust bitrate for the best possible result.

Adjustable Settings

Fine-tune audio parameters — codec, bitrate, and quality — before converting to tailor the output precisely.

Cloud Conversion

Processing runs entirely in the cloud, so your computer or phone does none of the heavy lifting. Just upload and download.

How to convert M2V to SOU

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose sou or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your sou file right afterwards

About formats

M2V is a file format containing MPEG-2 video elementary streams without an encapsulating container or associated audio data. Standardized as part of ISO/IEC 13818-2 (also known as ITU-T H.262) by the Moving Picture Experts Group in 1995, M2V stores raw compressed video exactly as it would appear within an MPEG-2 program or transport stream, but stripped of all multiplexing overhead. This makes M2V files primarily useful in professional authoring workflows, particularly DVD production, where video and audio streams are prepared and encoded separately before being muxed together into the final container format. M2V streams support both interlaced and progressive scan modes at resolutions ranging from standard definition up to 1920x1080 HD, with bit rates typically ranging from 2 to 15 Mbps for consumer content and up to 80 Mbps in professional applications. The use of both intra-coded frames and predictive frames provides an effective balance between compression efficiency and random access capability. Because M2V contains only video with no audio or synchronization information, it requires pairing with a separate audio file for complete playback. DVD authoring software commonly expects M2V input alongside AC3 or LPCM audio files, making this format an essential intermediate step in professional disc mastering and broadcast preparation workflows.
Initial release: July 1995
SOU is a raw audio format designation that functions as an alias for unsigned 8-bit PCM data (u8) in the SoX audio processing framework. Files with the .sou extension contain headerless, uncompressed audio samples stored as unsigned 8-bit integers — each byte represents a single amplitude value from 0 to 255, with 128 as the silence midpoint. Because there is no header, playback parameters such as sample rate and channel count must be specified externally. The default assumption is typically mono at 8000 Hz, though the data can represent any rate the recording hardware supported. The u8 encoding that SOU aliases is one of the simplest possible digital audio representations, predating structured audio containers like WAV and AIFF. Raw unsigned PCM was commonly produced by early sound cards and digitizers in the late 1980s and early 1990s, when storage constraints and limited processing power made headerless formats a practical choice. One advantage is absolute simplicity: SOU files can be read by any program capable of basic file I/O, with no parsing of container structures or metadata decoding required — useful for embedded systems, hardware diagnostics, and educational contexts where audio fundamentals are being explored. The format's minimal overhead also means that conversion to any modern container is lossless and instantaneous, since the raw PCM samples can be wrapped in a WAV or AIFF header without any transcoding.
Developer: SoX Contributors
Initial release: 1991

Frequently Asked Questions

What is the benefit of converting M2V to SOU?

While M2V is video-only, any audio muxed alongside it can be captured. Converting to SOU gives you the audio portion in a playable format.

Which applications support SOU?

Audio editors and format conversion tools handle SOU raw sound data files.

Will the audio quality match the original?

You can set the output bitrate to match or exceed the original audio quality. Higher settings preserve more detail from the M2V source.

How fast is the audio extraction?

Audio extraction is quicker than full video conversion since only the sound track is processed. Most files are done within seconds.

Can I choose the audio bitrate?

Yes. Adjust the bitrate, sample rate, and channel count before converting to get the SOU quality that suits your listening needs.