[BrionD] “I haven’t a clue why my FCP HD 4.5 compressor gives an error message each time I compress the film”
It might actually help if you posted the text of the error message.
[BrionD] “Always at the about 50% completed time.”
Here’s a rule of thumb: if you always have the same error in the same place, there’s something wrong in that specific place. You may need to look at both the picture & the audio to find it, because there are times when a problem with one will cause a subtle, yet disastrous problem with the other. I’ve seen audio spikes cause glitches in the picture, for example, or a spike in the luma cause a pop in the audio.
Arnie
https://www.arniepix.com