Audio and video completely out of synch

Anything and everything to do with DCP-o-matic.
tonski
Posts: 2
Joined: Mon Dec 15, 2025 12:02 pm

Audio and video completely out of synch

Post by tonski »

I am trying to create a DCP for a 1.5 hour movie. I have a mov video file that has its own sound, but I have disabled it in the content > audio section. I have an aif audio file as well with the audio enabled. Both files have the same length. When I am pressing play in the software audio and video are synched perfectly. Once I loaded the finished DCP into the DCP Player it was 3 hours long with the audio playing first with no image and directly afterwards the image with no sound. Same thing when I loaded the DCP into dcp-o-matic. I checked, in the timing section, both files' start times are set to 00:00:00.

I am using version 2.18.27 on a Macbook (Intel). Both the files and the destination folder are on an external harddrive.

Does anyone have an idea what the problem might be or what a solution / work-around could look like? Thank you in advance for your support!!
carl
Site Admin
Posts: 2909
Joined: Thu Nov 14, 2013 2:53 pm

Re: Audio and video completely out of synch

Post by carl »

Can you attach the metadata.xml file from inside the project folder here, or email it to carl@dcpomatic.com ?
tonski
Posts: 2
Joined: Mon Dec 15, 2025 12:02 pm

Re: Audio and video completely out of synch

Post by tonski »

carl wrote: Mon Dec 15, 2025 12:43 pm Can you attach the metadata.xml file from inside the project folder here, or email it to carl@dcpomatic.com ?
yes, sure! thank you for the quick reply!
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carl
Site Admin
Posts: 2909
Joined: Thu Nov 14, 2013 2:53 pm

Re: Audio and video completely out of synch

Post by carl »

Thanks, we can see there that the AIF file comes first, then the MOV follows it, so you do need to double-check those values in the timing tab.

Click on the MOV in the list, then check that its position is 0, and do the same for the AIF. Then it should work.

You can also check by clicking "Timeline"