Uli Plank wrote:@Chris
Normally I get TC across from files used in FCP. Could you check if those originals had TC with a tool like MediaInfo? Maybe it was switched off in the camera, which is a bad idea for any workflow.
There is an issue whereby FCP cannot read timecode from certain MP4 containers. The symptom is clip or source timecode shows as starting with 00:00. To fix that and several of the other previously-mentioned timcode issues, there is a Mac and Windows 3rd-party utility QTChange. By default, on an MP4 it will rewrite the timecode metadata in the header to Quicktime format, but it doesn't touch anything else. This assumes valid source timecode is present in the clip, IOW the camera was set to free run TC when recording.
https://www.videotoolshed.com/handcraft ... /qtchange/It can also read the clip creation time and set timecode to that value, or offset the timecode a user-specified +/- amount, plus do other things.
Obviously this should be tested on your own data and used at your own risk. It's good to keep before and after versions of the files and spot-check some with Invisor, MediaInfo, etc. However it works well in the cases I've tried. My favorite Mac tool for such inspections is Invisor since it provides a grid-format side-by-side comparison of the metadata from multiple files:
https://apps.apple.com/us/app/invisor-m ... 7586?mt=12