I´ve been having trouble exporting a video, it codifis but it does not generate the final file. An error pops up: "The archive importer has detected an inconsistency in the structure of domo2nd.mp4 files. Reading and writing of metadata has been enabled.
If that doesn't work, tell us your source properties and sequence settings. And by any. chance are any of your sources from a smartphone or a screen recording? If so, the issue is probably that some of your sources are variable frame rate
use mediainfo to determine whether your source is variable or constant frame rate