How to Fix iPhone Video Audio Out of Sync Issues?

The audio and video sync issue on your iPhone can happen due to various reasons, and sometimes it may be hard to find the root cause of your problem. However, the general causes can be related to the variable frame rate of the iPhone videos, software & hardware issue, and network connection issue.

iPhone variable frame rate: Your iPhone videos may be recorded with a variable frame rate that most video editing apps cannot support, causing the video audio not to sync.

Software & hardware issue: Your iPhone or the apps may have glitches and bugs that can affect the iPhone video playback, causing the video audio out-of-sync issue.

Network connection issue: If your network speed is slow or unstable, you may find that YouTube, Netflix, or other videos are not in sync with the audio.

Now you have a basic understanding of why your iPhone video and audio are not of sync. Let's dive into the troubleshooting methods.

1. iPhone Video Audio Out of Sync When Editing

Your iPhone videos may be recorded with a variable frame rate for better compression and performance. However, the variable frame rate is not ideal for editing. Most video editing software like iMovie, Final Cut Pro, etc. cannot support variable frame rate well. Then you will encounter the iPhone audio sync issue. To fix the issue, you can convert the iPhone video from variable frame rate to constant frame rate.

WonderFox HD Video Converter Factory Pro is a professional video converter that can help you convert video from variable frame rate to constant frame rate without losing quality. With it, you can also convert files to solve various format and codec issues for editing, playback, etc.

Download it to see how to start the conversion.

Step 1. Download WonderFox HD Video Converter Factory Pro and launch it. Open the "Converter" and click "+ Add Files" to import the problematic iPhone video(s).

Step 2. Click the right-side format image to expand the output format page. Select a format you want to keep.

Step 3. Open the "Parameter settings" window, find "Frame rate" and choose one constant frame rate from the drop-down options. Click "OK" to save the change.

Step 4. Click the bottom ▼ button to select an output folder and hit "Run" to start converting video to constant frame rate.

2. iPhone Recorded Video Not in Sync with Audio

The iPhone recorded video audio out-of-sync issue can also be caused by software and hardware bugs. You can try to update the software and your iPhone to the latest version or using another screen recorder for iPhone to fix and avoid iPhone audio sync errors in the future.

If you need to get the audio back in sync with video on your iPhone, you can also try to use WonderFox HD Video Converter Factory Pro to perform a video conversion to fix the out-of-sync video and audio in one click.

3. Online Video Audio Out of Sync When Playback on iPhone

If the video audio not being in sync on your iPhone issue occurs when you are watching YouTube or other streaming videos, then you can check if your network connection is stable and switch to a Wi-Fi connection if possible. Fast forwarding, reversing, and replaying the video can also fix the desynchronized video and audio sometimes.

You can also download the videos to avoid the playback issue caused by the network connection.

Apart from converting videos, WonderFox HD Video Converter Factory Pro can also help download videos from YouTube and other 1000+ sites. You can just use it to download videos in high quality for playback on your iPhone without issue.

4. iPhone Video Audio Desync Issue with Headphones/AirPods

Sometimes, the video audio not syncing issue only occurs with Bluetooth headphones or AirPods. In this situation, you can try to test with a different pair of headphones or with the speakers. Other tips like shutting down other applications using audio, resetting AirPods to Factory Default, etc. may also help with the issue.

The above is all I want to share with you about how to solve the iPhone video audio out-of-sync issue. If you encounter such issues, just follow this post to find the troubleshooting methods. If the problem still exists on your iPhone or in a particular app, you can contact the app developer or support team for help.

Thanks for your reading! Have a nice day!