On Mar 25, 2005, at 6:05 PM, Philip Hodgetts wrote:
At 5:23 PM -0700 3/25/05, Luke Wonderly wrote:
On Mar 25, 2005, at 3:17 PM, Colin Holgate wrote:
The data in an MPEG-2 file is 720x480, but those are non-square
pixels, intended for viewing on a 4:3 aspect ration TV. Computers
have square pixels, and so QuickTime Player plays the 720x480 at
640x480 so that the picture looks correct to you.
1. First the movie DOES NOT look correct!
When viewing side by side (720 X 480 to 640 X 480) - it looks
squished! Absolutely!
In addition - the Apple support tech I talked to - admitted (or
agreed) that the squished version would be showing ARTIFACTS
(because of it's squished nature) that were not really there, and
wouldn't show up - once on to DVD television delivery.
And WHY, if QT player plays & handles square pixels this way - do
some of my movies which ARE 720 X 486 show up & display correctly?
Then somewhere along the way you created the movie at 720 x 480 square
pixels, not at the correct pixel aspect ration. QT Player and the DVD
player assume that anything at 720 x 480 is in non-square (tall
rectangular) pixels and corrects it.
Oh man, you're right - SORRY!
The original source movies are: 720 X 486 (straight out of Avid as
uncompressed QT movie)
Another user experience: "when I try to play the MPEG2 in Windows
Media Player on the PC it becomes 720x480 and looks normal"
Because WMP only plays square pixels, confirming that your original
source is not correctly 720 x 480 non-square pixels.
That makes sense - didn't know that.
Another user experience: "can you explain then why Cleaner gives you
720x480 video in QT?
Something is just weird with QT maybe?
Or with the encode more likely.
The encode is based on basic presets in Compressor (60 minute high
quality - 2 pass) - and is happening to all those who do this.
In other words, stop worrying about it, the MPEG-2 file is fine.
Not according to some other users experience! (More info on
Compressor List)
"imported that same video into my Spruce Maestro it certainly was
squashed."
I would like to later incorporate this media into other multimedia
projects . . .
So I just go ahead and archive 2,014 movies in this incorrectly
displayed size?
You can *either* create something for a multimedia project on a
computer screen in square pixels *OR* you can create something for a
video monitor in non-square pixels. You can't use the same render or
source for both.
Hmmm - OK . . . . just wanted to make sure all of the work, and the
backup & archiving of hundreds of these QT movies was
will end up being correctly done - and useable in the future . . .
that's all.
Thank you for all of those who spent the time explaining this to me. I
think I understand.
