Your production and origination formats produce the master movie. Media Encoder (or Compressor or Cleaner or any of dozens of covnersion and transcoding apps) handles the additional exports for you. Your exported versions are not determined by anything other than the hosting serve and your desired viewers' experience. HDTV is 1920x1080. You don't need letterboxing or pillaring for youtube. YT and Vimeo offer extensive, if confusing, help systems for uploading and coordinating the viewers' experiences. That's not an After Effects topic. You want to produce in 1920x1080 if you ever hope to got to HD. Scaling and transcoding to H.264, MP4, AVI, mpeg, QT wrapper for additional editing — these are complex decisions.
The specificatiosn and sample settings for those devices you listed are available within Adobe's Device Central.
This might help you understand output and export better:
Thanks Bogie san! This is a big help to getting me started. And the link got me a little farther into Media encoder as well as Group of Pictures, intra-frame, and inter-frame.
One more related question... which will no doubt look simple (minded) but have an answer fraught with complexity.
If you were me (don't panic!), and you're making animated tutorials in AE with lots of illustration (some created in Illustrator and some in After Effects) and a significant amount of text from time to time (e.g., sometimes there are several boxes with, say, five English words in them, plus some drawings in the same frame with the boxes so that, although the frames are not cluttered, I also do not have the option of extremely large font sizes)...
...AND you believe most of your users will view from laptops, from LCD desktop monitors, and from iPads and the like (not iPhones so much)... with HDTV being something you view as an option it would be "just nice to have" though not necessary...
...what parameters would you choose when you set up your AE files?
As a straw example, lets say I select 640 x 480 (4/3 pixel ratio) because I think, rightly or wrongly, that would be good on YouTube. Should I double each number, keeping the 4/3 ratio? Do nothing? Do something different? What about pixel resolution? Am I worrying about this too much?
And, yes, I did pay attention when you said, "That's not an After Effects topic." I'm just not saavy enough yet to know what that really means.
Thanks in Advance,
> ...what parameters would you choose when you set up your AE files? <
1920x180p30. This gives you the best possible master. Then you encode to whatever format is necessary for your website's services or links.
If you just visit some of the better online tutorial sites, you can easily see what specs their movies are produced with. Sometimes it's not so obvious or easy to figure out but they're probably using H.264 at 720 rez but they probably started with full 1080 rez.