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In order to sync MP4 audio and video in an effective way, you had better adopt some third-party tools, such as AviDemux. Part 2: Sync MP4 Audio and Video with AviDemux

The effective solution for this is to use another media player instead. Due to some audio codec or video codec errors of the MP4 videos within the video player you have adopted, the audio delay will happen frequently. Last of all, it is about the MP4 video player itself. Rearranging the disk will have a better effect. Second of all, excessive fragmentation of the disk can also cause sluggish playback or delayed audio. Firstly, the MP4 video contents themselves are created with an unsynced soundtrack which would directly result in the audio delay. Usually, you can locate the reasons from the following points. If the audio delay still happens once all the MP4 videos have already been downloaded to the local computer, the reasons for the issue are different. If the audio is out of sync during the downloaded MP4 playback This is one of the direct cause for the audio delay during the playback.Ģ. Thirdly, it may be due to the slow Internet connection. Secondly, if the CPU processing power is not strong when playing MP4 large files, it will be obvious that the sound screen will be out of sync. If the current operating system has not been reinstalled for too long or has not performed related optimization operations such as cleaning up junk and the registry, the picture and sound will not be synchronized when watching the video. First of all, it is related to the operating system. If the audio is out of sync MP4 video while streamed online, then you can try to tell the reasons based on these parts. If the audio is out of sync while streaming online You can locate the specific reason for the issue based on the following points.ġ.

How to fix audio sync MP4 problems? Before this, we have to figure out what the possible reasons for MP4 audio out of sync.

Part 1: Possible Reasons for MP4 Audio out of Sync