Differences between iDVD encoder settings
Greetings,
OK, I looked in the forums, Pogue and Miller's iMovie'09 and iDVD book, and on the Web, and haven't found a satisfactory answer.
There are three options: Best Perf., Hi Quality, and Professional Quality.
On the iDVD help page (the same can be found at http://support.apple.com/kb/PH5417) it says, and I am paraphrasing and summarizing:
BP: Background processing available. Good for up to 1-hr videos, and quality will be excellent. preset bit rate. Use HQ or PQ for longer video.
HQ: This is the _best encoding option_ [my emphasis] for videos between 1 and 2 hours long. [OK so far.] (iDVD book and Apple disagree on bit rate; the former says VBR, while Apple seems to imply CBR.)
PQ: uses advanced technology, resulting in the _best quality of video possible_ [again, my emphasis]. Select for projects of up 2 hours duration. Time-consuming.
OK. so what's the deal here?
1) HQ and PQ can't both be best. Or is HQ best as a compromise of some sort, in which case it should specify it?
2) What are the differences for videos of less than 1 hour? Seems to me that you can't improve on the BP setting in this case. IOW, is there any point using HQ or PQ for videos of less than 1 hour?
3) For videos of 1 to 2 hours, does PQ always give better results than HQ?
So, is the following right:
A) For videos of less than 1 hour: use BP, as the others won't improve anything.
B) For videos between 1 and 2 hours: PQ will give better quality than HQ, but it will take a lot longer to burn the DVD, and BP won't fit.
Thanks!
AEF