I managed to open a project which i made with Encore CS3 in Windows, in Encore CS4 on Macintosh.
First i had the same problem as you had, but then i wanted to “play around a little” and then i found an option to “cheat”.
So, i had a project called “Studio move.ncor”, and that project had “Studio move” folder which contains Encores cache data, etc.
Go into that folder and locate a file called “ProjectMedia.acx”. Open it with Text editor.
As you can see, that file is pure XML and starts like:
<?xml version="1.0" encoding="UTF-8"?>
<EncoreProject xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="EncoreProject.xsd" platform="Windows" storageVersion="1.0">
<Context preset="PAL Dolby Digital" audioCodec="MPEG" maximumBitrate="6000000"/>
etc etc….
I think i dont need to say more? 😉
Ok, I’ll say, just in case.
The second line in that file is:
<EncoreProject xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="EncoreProject.xsd" platform="Windows" storageVersion="1.0">
Just replace this:
platform="Windows"
with this:
platform="Macintosh"
Thats all i needed to do to get that project open.
But unfortunately mine video was .avi, and my Encore couldnt open that file on Mac, so i had to convert my video file from .avi -> .mov, and I converted/transcoded it with VLC player.
Hopefully this works for others also =)