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Solution on Audio Out of Sync When Convert AVI, WTV, MP4, YouTube, MOV, WMV, MKV, VOB, MPG and etc

Easy Solve Audio and Video Out of Sync When Convert, Trim or Merge Video Files


Have you in the situation that the audio and video is synchronized in the original video, while the audio is out of sync after converting, trimming or merging video files like WTV, AVI, DivX, Xvid, MP4, MOV, MKV, VOB, MPG, WMV, ASF, DV, DVR, MXF, AVCHD, DV, YouTube, FLV, F4V and etc?

If so, you come to the right place! The following article will introduce a step by step guide on how to solve audio and video out of sync when convert or edit video files with whatever video software like iDealshare VideoGo, HandBrake, Clone2go, Any Video Converter, Roxio and etc.

How to Solve Audio and Video Out of Sync?

This guide applies to:

  • Fix audio sync issues occurred when using iDealshare VideoGo to convert or edit video files.
  • Solve audio video out of sync issues caused by using other video converting or editing software.
  • Fix audio out of sync when converting WTV, AVI, WMV, DivX, XviD, MPEG-1, MPEG-2, ASF, MP4, MOV, M4V, MKV, MXF, VOB, FLV, OGV, F4V, WebM, DV, Apple ProRes, MOD, TOD, AVCHD, RMVB and etc.
  • Sync audio and video when trim, join, crop, add subtitle/effect/watermark, and compress video files and more.

Make Preparation: Free download and run iDealshare VideoGo

Free download iDealshare VideoGo (for Windows, for Mac), install and run it, the following interface will pop up.

Audio Video Sync App - iDealshare VideoGo


  • If the audio video sync problem is caused when using iDealshare VideoGo and you already downloaded and installed it, there is no need to download it again, simply run it.
  • If the audio and video out of sync issue is caused by using other software, please download iDealshare VideoGo to solve this audio not in sync symptom.

Step 1 Add original video files

Click "Add File" button to import the original videos in which the audio and video is synchronized while the converted video is not sync with audio.

How to Fix Audio and Video Out of Sync?

Step 2 Set desired output video format

Click the "Profile" drop-down button to select preferable video format from "General Video" Category.

Step 3 Edit video files (Optional)

Click "Effect" button to edit the video files like trim, crop, adjust video image, add watermark or artistic effect, add or remove subtitles, and rotate video and etc

Step 4 Setting for sync audio and video

  • Click "Setting..." button, the "Advanced Settings" Window will pop up right beside the main window.
  • In the "Advanced Settings" Window, click "Advanced" tab, and then click the "+" on the left of the "Video Codec" to spread the drop down column.
  • Then go to "async" column, write 1 in the Input box on the right side of "async".
  • Then click "Apply to All" and OK.

Step 5 Finish syncing audio and video

Click the "Convert" button to start and finish solving the audio is not sync with video issues.


All kinds of audio and video out of sync issues occurred when converting video files will be solved with the above step by step guide. And you will never worry about the following audio out of sync issues:

  • When I try to convert AVI to MP4 with Handbrake, the output video audio is out of sync though the original video has no audio problem.
  • The converted video to be out of sync and there is delay on audio, or the video is too fast.
  • Everything is fine until I try to trim file. At that point the audio is out of sync with video.
  • After conversion of WTV (recorded with media Center from TV) to Apple TV Format on Windows7 PC, Sound and Video are not synchronous anymore. Any hint how to get rid of that?
  • I was trying to change the aspect ratio of an .avi file I had. The before and after windows looked fine but after conversion there was a significant delay in the sound.
  • On some conversions from WTV or DVR-MS to MP4 the audio is not in sync. Audio is fine in the input file. How do I resolve this problem?