Partly for convenicence and party for self-indulgence, I'll be using a recently near-completed shot from a film I'm currently working on.
The film was shot in 4:3 on a standard, consumer quality PAL miniDV cam. This gave us an effective resolution of 720 x 576. I knew that when we shot this, I would later be cropping it to be widescreen, for cinematic effect and for proper fitting to widescreen TVs when I give the DVD to my family and friends. The aspect ratio I decided to crop to was 16:9. This gave me an effective final resolution of 720 x 405. Anything greater, such as 2:35:1 would simply be unjustifiable given the amount of data I had to start off with.
Because I knew that I was going to crop it later on, I framed all my shots to have important action horizontally more than vertically. On occasion important stuff happens that exceeds the 405 vertical pixels I have - in these cases, a digital camera tilt is just the job.
Here is a frame,
and a video of the finished shot, in its original 4:3 aspect ratio.
...and here is the cropped version, in 16:9.
Video here.
SGCWill said:
no, not zoom, if the source is 4:3 it can be stretched to 16:9, and still look ok, but if it's changed from 16:9 to 4:3 then it'll look squashed.
I'm not sure you're quite right there - If we "stretch" a 4:3 directly to 16:9, we get this:
Which looks a little odd.
..and if we take a 16:9 source and put it back into 4:3 without bars, we get this:
Hmm. Are you sure you didn't mean "crop", like I have done in my video? You can't stretch 4:3 into 16:9 and have everything stay in its proper aspect ratio. You could zoom, as stated, but the correct solution is to crop. If 4:3 film makers keep 16:9 in mind when recording their footage and applying their post effects, this shouldn't be a problem.