When I export to DPX the length of my sequence is being affected. As far as I'm aware all my frame rates are consistent at 25fps, yet when I export my sequence length (originaly at 18 minutes long) turns out at 14 minutes.
Any suggestions would be greatly appreciated. Thanks!
The info next to the thumbnail of your footage generated in the Project Panel gives you the format and frame rate. Here's some footage from a GoPro:
I'll bet that your footage is being interpreted as 30 fps because that is the default setting in the preferences.
Change the interpretation of your sequence by selecting the sequence in the Project pannel and then selecting File>Interpret Footage>Main.
If you always work at 25 fps change it in the preferences under Import: