Full length file & timeline lenght do not match

[Stamper]

Hi guys,

So I'm puzzled by this weird stuff I'm trying to sort between FCPX and Adobe Premiere pro.

I have a film H264 23.976 file, that I reencoded from VC1.

It's length is 01:42:29:17 when imported in FCPX.

When I create the 23.976 timeline, and drop the file in, the length comes at 01:42:23:08

When I create the 29.97 timeline non drop frame, and drop the file in, the length comes at 01:42:23:11

When I create the 29.97 timeline with drop frame, and drop the file in, the length comes at 01:42:29:15

Now I use Adobe Premiere, with the same file.

It's length is 01:42:29:12 when imported in Adobe Premiere.

When I create the 23.976 timeline, and drop the file in, the length comes at 01:42:29:12 although when I double click the file in the timeline, it says it's 01:42:29:11.

I supposed to use this file to sync LD audio. How do I do it right? Which one to use?

Thanks if anyone can help.

[bendermac]

In FCPX always use ProRes if possible. H264 files can create weird behavior when used in the timeline. Idk why that is.
You can test this with letting FCPX transcode your file to ProRes. Should be fine after then.
Also use the FPS for your timeline that you want to output and what the majority of your files is. This reduces errors as well.

[Stamper]

Thanks, the funny thing is, I er "localised" the same footage from somewhere else, just to check it in comparison to mine, and these encodes have 2 extra frames at the beginning, adding to the confusion.