You need to take a look at all your various media assets ( movie clips only) and get a feel for what the codecs are and the various resolutions. ( pixel x pixel dimensions)
eg 1080p, 720p, DV etc...
I would advise creating a sequence that matches the lowest resolution asset.
That means you scale your highest rez assets down to fit. ( easy and can be automated).
Make a little list of what you have got , post it here and some one will advise.
What was the profesionally digitised media done as? ( ie file type , size)
Once you "generally" figure out how you want to edit (lots of good advice just above) you let PPro help you... per instructions below
Please NOTE that the PPro CS6 screen may look a bit different (I use CS5)
For CS5 and later, the easy way to insure that your video and your project match
See 2nd post for picture of NEW ITEM process http://forums.adobe.com/thread/872666
-and a FAQ on sequence setting http://forums.adobe.com/message/3804341
Thank you for your advise shooternz. I went through all of my footage and made a list of the codecs and pixel x pixel dimensions. The profesionally digitised media are .mov, and the sizes range from 600mb to 10GB.
How do I scale down the footage?
.mov 640 x 480 29.97 fps (transferred from 8mm film)
.mov 720x480 29.97 (transferred from 8mm film)
.mov 720 x 480 29.97 fps (transferred from VHS)
DV 720 x 480 29.97 fps (transferred from Hi8/captured firewire to iMovie)
MPG 720 x 480 29.92 fps (recorded on a 60i consumer camera)
MTS 1440 x 1080 29.97 fps (recorded in 60i consumer camera)
.mov 1280 x 720 30 fps (recorded on iPad2/ used app called Filmic Pro 32mbit/sec)
.mov 1280 x 720 30 fps (recorded on iPhone 5/used app called Filmic Pro 32mbit/sec)
.mov 1920 x 1080 30 fps (recorded on iPhone 5/used app called Filmic Pro 32mbit/sec)
.mov 1920 x 1080 30 fps (recorded on Zoom Q2)
Also when I play any of the footage recorded from the iPad and iPhone in the source window it doesn't play back smooth. No jittery, but kind of warbley.
widescreen. Is that a bad idea?
Not really. It's more of a personal preference. You have both square and widescreen media here, so some decisions need to be made. If you edit in Widescreen, then the 4:3 stuff will have bars on the sides. If you edit in Standard, then the widescreen stuff will either have bars on top and bottom or have it's sides cropped off.