I have Pinnacle Studio 15 now. I have submitted my 1st problem to this site as am getting nowhere with pinnacle. One reason I went for the full PS15 ultimate collection is wrongly I assumed P15 would include all the known codecs concerned with AVI files. Wrong you get exactly the same in P15 THERE IS NO DIFFERENCE. So don't buy P15. I know this is a bit late and limited advice but only just joined the forum. I have CCTV converted to AVI files- these files are long and want to shorten them to the applicable time frames I need. I can import them into P15 and indeed they play. But that is all I can do. When they are put into the the time line-They go black/or the blue question mark. Once or twice they tried to play in viewer but were totally blocky/striped. Threfore useless. Am very dissapointed with P15- I can not even transfer old content despite having the content discs I mistakingly threw away my old PS10. PS11 discs thinking surely they are now obsolete with P15 Ultimate collection full version . Wrong you have to have P10 or 11 installed first taking up HD space. How stupid is that. To offer some info to your question after much palaver got a message from Pinnacle I also need more codecs with PS15. Great they do not say where exactly where I obtain these codecs. They have suggested I send one AVI file in to them to examine but must be less than 5MB ?. They miss the point these files are large I have no way to cut them down. This is exactly why I want to put them on the time line to splice, then burn to DVD. I also have a strange problem with P15 over P14 See my entry as P15 uses a so called Mpeg ES conversion.I can not import any AVI file,DV/or HDV.