How-to guide
How to extract audio from an OBS capture
OBS Studio is the most common free screen recorder for streamers and podcasters, and its default output is MKV (for crash safety) or MP4. VideoSplit reads both and gives you the audio track in seconds without remuxing through ffmpeg first.
OBS records all configured audio sources into a single mixdown by default. If you enabled Advanced Audio Properties → Record separately, you will see multiple audio tracks in the MKV — VideoSplit reads the first one. To pick a different track, re-order in OBS or use MKVToolNix.
Step-by-step
- Finish recording in OBS. Stop the recording. By default, OBS saves to ~/Videos on Windows or ~/Movies on macOS.
- Open VideoSplit.io. Any modern browser.
- Drop the OBS file onto the upload area. MKV, MP4 and even MOV outputs from OBS all work.
- Pick WAV for editing, MP3 for archiving. For podcast post-production or streaming VOD audio, WAV is the right call. For a listen-and-delete archive, MP3 saves space.
- Download the audio. Saves under the OBS recording's original filename.
Tips for better results
- If you recorded to MKV for crash safety and the recording actually crashed, the MKV may still be intact (that is why OBS defaults to MKV) — try VideoSplit before assuming it is lost.
- Long streams (4+ hours) as MKV files can be 5+ GB — processing time depends entirely on your CPU.
- OBS's 'Use stream encoder' recording mode produces H.264 in an MP4 — also supported.
Free forever. No upload, no account.
Drop a video, get a WAV or MP3. Runs entirely in your browser — nothing uploads, nothing to install.
Try it free