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criehl's avatar
criehl
New member | Level 2
7 years ago
Solved

Why is my video audio out of sync for video files uploaded to Dropbox?

I have .mov file I created in which the audio sync is correct on my computer (Mac). But when I upload the .mov file to my DropBox account, the audio is out of sync in the copy on DropBox. How do I ...
Mac
sync
  • criehl's avatar
    criehl
    7 years ago

    I figured it out.  The file on DropBox is fine: when I DOWNLOAD it, there are no sync issues. So it looks as though the problem is opening it from DropBox. The playback Codecs playing from the Web site mess up the sync. But as long as the file is fine, my co-collaborators will be able to download it.

     

    Thanks for taking the time to reply.

MrMisterHarris's avatar
MrMisterHarris
New member | Level 2
7 years ago
It plays out of sync on both. I am unsure how to fix
Lusil's avatar
Lusil
Icon for Dropbox Staff rankDropbox Staff
7 years ago

Thanks for clarifying that for me, MrMisterHarris.

Dropbox doesn’t alter your files, so if a video plays out of sync even after downloading it, it means that the video was originally, uploaded that way.
 
However, another possibility is that the video player you are using doesn’t have the correct codex to play the video.
 
In this case, try using another third party app to play the video locally and, if it still plays out of sync, locate the original video and try uploading it again. 
 
Let me know how it goes!
  • MikeyL's avatar
    MikeyL
    New member | Level 2
    7 years ago

    I'm having the same sync issues . The file is fine , it's just the Dropbox playback .

    • Rich's avatar
      Rich
      Icon for Super User II rankSuper User II
      7 years ago

      When viewing files on the Dropbox website you're not viewing the original. You're viewing a transcoded preview of the original file. The conversion process is rarely perfect and can often times create undesired results, especially in videos. The preview is not intended to be used to stream the original file. It's just a preview of the original.

      To view the file in its original form, you need to download it and play it locally. If it's out of sync when you play it on your computer, then it's a problem with the file or video player that you're using.

      • MikeyL's avatar
        MikeyL
        New member | Level 2
        7 years ago

        Thanks Rich . 

           It would be great if such a disclaimer appeared when previewing . At least until the issue is fixed .

         I use Dropbox (pro) to preview my film work for clients. It just doesn't look very pro when it's out of sync! 

           Making people download files isn't ideal , especially when the preview function on youtube pruvate clips works fine . 

             As for the ZIP download issues on large files. Well , that's a whole other story 

                

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