DVD and video editing for Mac OS X

Wide-screen (16:9) movies with iMovie and iDVD

1. Import 16:9 video into iMovie. Clips will be displayed compressed into 4:3 format.
2. Edit the project and save.
   
3. Click iDVD button. iDVD will launch.
   
4. Creat the project in iDVD. When the status indicator shows that encoding is complete, save the project file and quit iDVD.
5. Right-click on the DVD project file and select Show Package Contents.
6. Navigate throught the folders Contents and Resources to locate the MPEG folder.
7. Option-drag the MPEG folder to another location (e.g. your Desktop) to make a copy. 
8. Download HexEdit and use it to open in turn each file within the copied MPEG folder.
9. Use HexEdit's Find and Replace option to find every instance of "2D 02 40 23" (describing 720 x 576 PAL in 4:3 ratio at 25 fps) and replace it with "2D 02 40 33" (describing 720 x 404 PAL in 16:9 ratio at 25 fps), saving each file. For more information about the changing the MPEG header, click here.