Audio not in sync on export

[asgweb]

Moc OS 10.14.6
Shotcut 24.1…31
I have a music video that is aligned and synced in timeline. When I export, the separate audio track is one second early. I’ve tried many export options to no avail.
I’ve read other threads but no. answer. Help?

[brian]

It would be helpful to show a screenshot of your project so we can see what clips and tracks you have.

One reason could be if Shotcut has trouble seeking in your clip, or they have variable frame rate but Shotcut does not detect it.

As an experiment, try to convert your video clips using the instructions here:

Editing Variable Frame Rate Source Clips

Introduction Sometimes users report that Shotcut is not frame accurate. For example, they split a clip on a certain frame, but then later the split is not where they expected it. Or, they put a keyframe on a certain frame, but later the keyframe seems to be on a different frame. Also, sometimes people report that the audio and video out not in sync. Symptoms like these can be caused by Variable Frame Rate (VFR) source clips. Some users report that VFR clips work in Shotcut if the VFR is subtle.…

Do the converted clips provide better synchronization?

[alex007]

Hello, did you check that the input video audio sampling frequency does match the output video audio sampling frequency (not codec depended)!
In case of a mismatch this might be the first thing to check (e.g. input 44100 Hz and output 48000 Hz). So It could be the conversation cannot be done 100% accuratly.