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  1. Member
    Join Date: Apr 2008
    Location: United States
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    I was wondering if anyone could recommend a simple way to fix an audio sync issue within a wmv file I have. The wmv file was created from a live stream, so I don't have anything but the wmv file to work with. The audio is consistently 1/2 a second early throughout the entire video. Anyone know how I can fix this without having to convert to another format?
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  2. Banned
    Join Date: Jun 2007
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    AsfBin can fix that.
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  3. Member
    Join Date: Oct 2005
    Location: United States
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    Is there an alternative to asfbin? I have a wmv that is somehow 33.5 seconds out of sync. ASFbin allows for a max of 10s. How stupid is that!
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  4. Member
    Join Date: Sep 2007
    Location: Canada
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    Originally Posted by unknownsoldierX View Post
    Is there an alternative to asfbin? I have a wmv that is somehow 33.5 seconds out of sync. ASFbin allows for a max of 10s. How stupid is that!
    Did you try entering the number? (instead of using the GUI slider)
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  5. Member
    Join Date: Oct 2005
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    Yes. In VLC, the audio is in perfect sync when I set it -33.500s. When I set Asfbin to -33500ms, it doesn't even get close to being in sync.

    The audio in the original is 33.5 seconds late. The resulting file from asfbin is still at least 20 seconds late.
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  6. Member
    Join Date: Sep 2007
    Location: Canada
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    are you moving the right direction ?

    sometimes a delay is + or - depending if it's expressed as audio or video "delay" and sometimes it's expressed as a "shift"
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  7. Member
    Join Date: Oct 2005
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    Yes. In VLC, setting -33.5 hastens the audio, as VLC says "(hastened)" when you add a - to the value. In asfbin, it is a delay setting, so using a negative number also hastens the audio. Seems that even though you can enter a value into asfbin, it is still limited to the range set by the bar, which is 10 seconds.
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  8. Member
    Join Date: Sep 2007
    Location: Canada
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    Originally Posted by unknownsoldierX View Post
    The audio in the original is 33.5 seconds late. The resulting file from asfbin is still at least 20 seconds late.
    Oops I didn't see that before posting above, must have been edited post . It looks like the correct direction if it's getting better

    You might be able to do it with ffmpeg using -itsoffset , but I' m not entire sure on the syntax

    It's going to look something like these examples
    http://www.kkoncepts.net/node/69
    http://forum.videohelp.com/threads/346293-Insert-Audio-Delay-With-ffmpeg
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  9. Member
    Join Date: Sep 2007
    Location: Canada
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    Also you might try the command line asfbin version (it might not be as limited as the GUI)
    http://www.radioactivepages.com/asfbindetails.aspx#cmdline

    I think it should be
    asfbin -i input.wmv -o output.wmv -adelay -33.5
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  10. Member
    Join Date: Oct 2005
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    Totally forgot that there was a CLI version of asfbin. It worked. Yay!

    Thank you!
    Last edited by unknownsoldierX; 20th Nov 2012 at 14:31.
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  11. Member
    Join Date: Sep 2007
    Location: Canada
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    Out of curiosity - how in the world is the A/V sync more than 30secs off ? That' s huge!
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  12. Member
    Join Date: Oct 2005
    Location: United States
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    No idea. It's something I downloaded and It was just like that. Not sure how it was made.
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