Movavi Video Editor Plus is our pick of the best audio video sync software. To fix audio video sync permanently, use the best audio and video sync software on your Windows 10 or macOS device. Best Audio and Video Sync Software for Windows 10/macOS.
![]() Video Audio Sync And Repair Tool Download The PackageAlso make sure to enable the option called ‘Shift’ (disabled by default), as it is the option that lets you change the audio/video sync setting (shown below).Any value that you enter here (‘Shift’) should be in milliseconds (1000 milliseconds = 1 second).Now, if you know what the correct audio/video sync value is then you can skip this and go directly into the end of ‘ Step 5‘. I just added this ‘update’ just to give some confidence to the readers.First of all, go to this page, download the package and install it (it has pre-built packages for Windows, Mac OS X and GNU/Linux).Now open ‘Avidemux’ program and load the ‘troublesome’ multimedia file into it.Before continuing, under the ‘ Video Output‘ and ‘ Audio Output‘ options, make sure it says ‘Copy’. If this method fails, then I’ve added another method that guarantees results in most situations at the end of the article as well.Update (): Yes it’s been more than four years since I originally wrote this post (yes, even so, I update it from time to time), but the instructions still work.But there can be occasions where it requires one to enter higher values.Anyhow, unlike above, this time we have to add a negative value as the sync value, in order to make it load earlier (if you enter ‘-200’, then that means the audio will be loaded 200 milliseconds early).Let’s assume that the file you loaded had an audio track that was being played with a delay. However, in my experience, the usual range is 200 milliseconds to 2000 milliseconds (2 seconds). This is done by entering a positive sync value (say 200 milliseconds) into the ‘Shift’ box.If it comes few seconds (or milliseconds) after the video scene is displayed, then it is already delayed, therefore, we have to ‘remove time’ from it, thus making it being played early.One cannot give you the exact audio/video sync value that is needed as it is something that you will have to guess by observing the video playback. How to Sync Audio and Video Correctly?The rule of the thumb is that, if the audio is played before the video, then that means we have to ‘add time’ to it (thus delaying it), so the video track can ‘catch up’ with the audio track.![]() I haven’t tried this, but someone called ‘John’ in the comment section let me know of this which has worked for him under Windows XP. Yes this will re-encode the audio file, but it shouldn’t take a long time since encoding an audio track isn’t as difficult or time consuming as encoding a video file. I have been able to successfully save the corrected sync settings of certain MP4 files, by simply making that change alone!.Update 2: If that doesn’t work, then try changing the audio output from ‘copy’ to ‘MP3 Lame’. If this occurs, then I advice you to try selecting ‘ MP4v2 Muxer‘ rather than using the ‘ MP4 Muxer‘ (under ‘ Output Format‘). This does not concern the computer users as most popular players support playing the awesome MKV format.Update: Sometimes while trying to fix a MP4 file, though you might be able to successfully fix it and play it in ‘Avidemux’, the corrected sync value might simply be lost, after saving it into a new MP4. Mac cache cleaner yosemiteHowever, that method only supports saving your input files (you can input almost anything into it AVI, MPEG, MP4, FLV …) into ‘MKV’, which as briefly mentioned above, is not playable on certain hardware based multimedia players. So I wrote another method that uses another software tool (it involves two tools actually), which is known to work most of the time for correctly syncing the audio and the video. Well, that is it!.Update: Some readers have complained that ‘Avidemux’ software is not always working for them when correcting the audio and video synchronization.
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