> ## Documentation Index
> Fetch the complete documentation index at: https://klarity.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Why your video upload shows 'No audio detected'

> Fix the 'No audio track detected' error when generating an SOP from a video upload.

export const NeedHelp = () => <Note>
    <strong>Need help?</strong> Use the in-app chat — click the chat bubble in the bottom-right corner of Klarity Architect (staffed 24×5) — or email <a href="mailto:support@klarity.ai">support@klarity.ai</a>.
  </Note>;

## Symptom

You uploaded a video to Architect to generate an SOP, and the run failed with the message **No audio track detected** or **SOP generation failed: audio missing**.

## Likely cause

Klarity's SOP generation reads the audio track of your video to capture narration. If the video file doesn't contain an audio track, or the audio track is empty, silent, or damaged, the run cannot proceed. This happens most often when:

* The video was recorded with the microphone muted.
* The screen-recording tool was configured to capture video only.
* The audio track was stripped during a video edit or compression step.
* The video was exported in a container that does not include audio (rare with modern tools, but possible).

## Fix

Klarity cannot recover a missing audio track. The fix is to provide a video that includes audio.

1. **Verify the audio is actually missing.** Open the video file in any media player and confirm there is no sound. If you do hear sound, see *When to contact support* below.
2. **Re-record the video** with the microphone enabled. For Loom, Zoom, or screen recordings, check the tool's audio settings before recording.
3. **For an existing edited video,** re-export from the source file with the audio track included.
4. **Re-upload the corrected video** to Architect and start a new run.

## Pro tips

* If you record narration separately, you can mux the audio and video together in any video editor (iMovie, Premiere, DaVinci Resolve all support this) before uploading.
* For long meetings, recording in Zoom with **"Record audio separately for each participant"** disabled produces a single combined audio track that Klarity processes well.
* The audio does not need to be high quality — a phone microphone is sufficient. It just needs to exist.

## When to contact support

Contact support only if you can confirm the audio track is present (you can hear it on playback) but Klarity still reports *No audio detected*. This is rare and may indicate a file-format issue our team needs to investigate.

<Info>
  **When you contact support, include:** the run ID, the file name, the file format (mp4, webm, etc.), and ideally a screenshot of the audio waveform from your video player to confirm audio is present.
</Info>

<NeedHelp />