Thank you for answering,
At the start, the original format of the movie was an Web ".Xvid", which was saved as a ".avi" video format for PAL. I've tried to save it in various formats so it would be compatible with standard "NTSC" format here in America (29. 97 fps) so I could burn it on a standard DVD. The original ".avi" film was about 700.2 Mo. I have a MacPro, early 2009 working with 10.5.8. I use the last version of Roxio 11 Titanium, which I beleive to be 11.0.6.
I then convert first to a ".mp4" format so Toast could then accept it. This is where Toast said to me that it had to convert it to "NTSC" before burning and this where
Since I found out that all was a matter of Ripping the film from PAL to NTSC before anything, I've tried to convert it with HandBrake. But, all I got was an ".mkv" format that Toast could not then accept as a valid format?
As you can see, I'm a nwebee in all of this, very confusing, and very time taking for me. even if I've tried reading carefully the documentation about it with the Roxio User Manual which do not tell us very much on how to proceed in such a case.
Now, I'm trying to convert the original file again directly in Toast just to see if it will work this time. After converting the movie as from now, all I got was a very choppy result that opened by default in iTune?
Thanking you in advance for your help and looking forward to read you,