CS2 Voice extractor

Example code for exporting players voices from CS2 demos into WAV files.

Valve Matchmaking demos do not contain voice audio data, as such there is nothing to extract from MM demo files.

Purpose and goals

The intention of this project is not to be an end user tool for bulk or batch processing demos and extracting voice data.

However, this should serve as a guideline for how to process the audio data as pulled by demoinfocs-golang. People using that tool to process their demos who wish to also pull voice data can leverage this sample to build that audio processing into their demo processing tools.

Setup and processing

1. Pulling all the required dependencies. 2. go get ./...
2. Update the cs2-voide-data.go file with the path to your unzipped demo file.
3. Running the sample 5. go run cs2-voice-data.go

Dependencies

This project does have a dependency on lib opus, which is easy to install on mac/linux.

Linux:

sudo apt-get install pkg-config libopus-dev libopusfile-dev

Mac:

brew install pkg-config opus opusfile

As for direct application dependencies those are all handled by the go.mod and are all pulled doing the go get ./... from step 2 above.

Acknowledgements

Thanks to @rumblefrog for all their help in getting this working. Check out this excellent blog post about Reversing Steam Voice Codec and their work on Source Chat Relay

This sample relies on demoinfocs-golang. Thank you to @markus-wa, @akiver and all the contributors there.