06.08.2018, 12:24
OK, I got this working, but I cheated 
I tried various versions of ffmpeg, and eventually found a working version from last year (3.2.4), which appears to produce the correct file.
The working command was simply:
ffmpeg -y -enable_drefs 1 -use_absolute_path 1 -i "P:/CSI/Test/CSP0002377.mov" -map 0 -c copy "P:/CSI/Test/test22.mov"
The output file is 25fps with no errors on output, tbn also correct.
Thanks for all your help Selur, as always, very helpful and knowledgable.
Kind regards.
I tried various versions of ffmpeg, and eventually found a working version from last year (3.2.4), which appears to produce the correct file.
The working command was simply:
ffmpeg -y -enable_drefs 1 -use_absolute_path 1 -i "P:/CSI/Test/CSP0002377.mov" -map 0 -c copy "P:/CSI/Test/test22.mov"
The output file is 25fps with no errors on output, tbn also correct.
Thanks for all your help Selur, as always, very helpful and knowledgable.
Kind regards.