How to fix "Your app preview contains unsupported or corrupted audio" error

When you upload an app preview video to App Store Connect, you might come across this error.

Your app preview contains unsupported or corrupted audio.

This one is especially confusing when your video has no audio at all. How can silence be corrupted?

In this article, we will learn what is causing this error and how to fix it.

Cause of the problem

App Store Connect requires every app preview video to contain an audio track. A video with no audio track is rejected — even though a video with a silent audio track is perfectly fine.

This is the part nobody expects: you must add an audio track even if you don't want any sound.

You will typically hit this error when your recording comes from a source that doesn't capture audio:

• Xcode Simulator recording (xcrun simctl io booted recordVideo) produces a video with no audio track.
• Screen recordings where the microphone is off and no app audio is captured.
• Videos exported from design or motion tools that never had an audio track.

The same error also appears when the audio track exists but uses a format App Store Connect doesn't like. Apple expects AAC or PCM stereo audio, and 48 kHz is the safe sample rate to use.

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How to fix "Your app preview contains unsupported or corrupted audio"

To fix the error, you need to add a (silent) audio track in an accepted format to your video.

Option 1: ffmpeg

This command adds a silent stereo AAC track at 48 kHz without re-encoding the video:

ffmpeg -i input.mp4 -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=48000 -c:v copy -c:a aac -shortest output.mp4

If your video already has an audio track in a bad format, re-encode just the audio instead:

ffmpeg -i input.mp4 -c:v copy -c:a aac -ar 48000 -ac 2 output.mp4

Option 2: iMovie

Apple's own suggested workflow is to bring the video into iMovie, add any background audio, set its volume to zero, and export again. It works, but it is a lot of clicking for what should be a checkbox.

Option 3: App Preview Converter (one click)

I built a Mac app that fixes this automatically: App Preview Converter.

Every export includes a valid audio track — if your recording already has audio, it is converted to the format Apple expects; if it has none (like a Simulator recording), a silent 48 kHz stereo track is added for you. The exported file also passes every other App Store Connect requirement in the same step:

• The exact resolution for your selected device slot (886×1920 and friends).
• Constant 30 fps frame rate.
• Duration trimmed to the 15–30 second window.
• H.264 in an accepted container.

So a raw Simulator recording becomes an upload-ready app preview in one export.

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