It looks like, after the export of my timeline, the audio has moved and is no more synchronized, although before the export, it was synchronized. Why? What can I do? Did I miss anything?
My video in the timeline is “lossless FFV1” with default settings.
In my timeline I have not a separate audio track. But I have made some cuts with the key “s” in the timeline. And I have moved audio in some sections (sections created with the key “s”) in the timeline with the properties-tab → Audio->Sync. So I have only one track.
I have exported H.264 Baseline Profile with default settings from Timeline.
If the Properties > Audio > Sync was done at the same time as Settings > Synchronization > 250ms, then you’re probably fighting yourself.
Start a new project and do “Open Other > Count” with Sound set to “Frame 0”, and see if the sounds line up with the change in numbers. Alter Settings > Synchronization as needed to make audio and video aligned.
Then go back to your original project and alter Properties > Audio > Sync if needed. It probably won’t be needed if the source file is any good.