I just noticed that the audio on the second half of a dvd I burned is out of sync with the video. I basically made an mpg file from two different videos, one following the other. The mpg plays fine without any sync issues. One thing I think might have happened is when I went to create disc I changed the audio settings, specifically changing it to mpeg audio to create more disc space. Could this audio conversion have caused the second half of the dvd to fall out of sync? I am going to try everything again but this time keep the audio settings the same, and just shorten the duration of the video.
-AC
Audio sync issue after burning
Moderator: Ken Berry
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THoff
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ac37174
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THoff
I haven't heard of an A/V sync problem resulting from using MPEG audio in UVS 9. However, if you are in a country that uses NTSC video, be aware that MPEG audio is not part of the DVD standard, and support for it is not mandatory and may be buggy in the standalone DVD players.
In any event, the preferred way to handle changing the audio format would be to create a new file using Share -> Create Video File, and to include those in your DVD project. The consensus in these forums is that this will most likely result in a smooth and trouble-free disk creation.
In any event, the preferred way to handle changing the audio format would be to create a new file using Share -> Create Video File, and to include those in your DVD project. The consensus in these forums is that this will most likely result in a smooth and trouble-free disk creation.
This is a very common, very nasty problem which seems to have many different causes & solutions. Search the forum for "sync", and you'll find lots of suggestions & discussion.
Before burning, the audio and video are demultiplexed if the format of one or the other is changed. At some point, the corruption in the audio or video file may be "fixed". This repair may change the length of the audio or video file. For example, corrupt video frames may be thrown-away. Now the audio & video files have different lengths. When they are re-multiplexed, they are out of sync.
Were these two videos in MPEG format? When I had this problem, it was caused by editing MPEGs. (MPEGs are not meant to be edited!) It think it was caused by joining MPEGs with a transition. (I was using Video Studio 8.) I solved my problem by switching to Womble MPEG Video Wizard. (It's a special-purpose MPEG editor only. It does not have any DVD authoring ability. I use Ulead DVD Workshop for DVD authoring.)I basically made an mpg file from two different videos...
This can be deceiving. The multiplexed audio/video file may have some corrupt frames which may not be noticeable during playback. It took lots of experimentation before I figured this out! I thought the problem was DVD Workshop, because the problem didn't show-up 'till I made a DVD.The mpg plays fine without any sync issues.
Before burning, the audio and video are demultiplexed if the format of one or the other is changed. At some point, the corruption in the audio or video file may be "fixed". This repair may change the length of the audio or video file. For example, corrupt video frames may be thrown-away. Now the audio & video files have different lengths. When they are re-multiplexed, they are out of sync.
I have had audio/video sync problems in VS9. It seems to occur when multi edits are done on a video clip, no matter how long. It seems when you to cut frames from the beginning, middle and end of a clip the sync sometimes gets out of wack. What I do to elimiate the sync problems is to cut the video down to no more than three cuts and create a mpg segment. I then preview the clip to see if the audio/video is in sync. I then get the next video segment and do my edits, after all the segments are finished, I put them all together on the time line and create a final video clip, which is then scanned for audio/video sync. Then the DVD is created with the final video. This seems to have cured my sync problems.
It's a pain but I can not predict when the audio/video gets out of sync.
One thing I have found out in VS9 is if the audio/video is in sync in the mpg video is will be in sync on the final DVD. In VS8 the creation of a DVD would creat a out of sync disk.
It's a pain but I can not predict when the audio/video gets out of sync.
One thing I have found out in VS9 is if the audio/video is in sync in the mpg video is will be in sync on the final DVD. In VS8 the creation of a DVD would creat a out of sync disk.