Reduced frame size results in increased file size (?!)

Hello
I am trying to decrease the resolution of my HDV video to a smaller size, to put in on Viddler. The format there apparently is width="437" height="370".
I exported from FinalCut into a QuickTime file, the file size is 485MB.
Then I used QuickTIme Pro to change the movie into the above frame size, and add a letter box.
The resulting file is over 6GB in files size! How can this be? I used no compression and these settings: no compression, millions of colours, Best Quality, Apple Lossless sound, 48.000MHz, Mono.
The reason for not compressing is that Viddler will compress on its servers (into Flash).
Any hints? I must stay under 500MB to upload the file to Viddler.

I am trying to decrease the resolution of my HDV video to a smaller size, to put in on Viddler. The format there apparently is width="437" height="370".
According to a Viddler "staff" member on their forum, the player is 545x408. Therefore I would try one of the following:
544x408 (4:3 aspect) 544x306 (16:9 aspect) (closest match disregarding macro blocks)
512x384 (4:3 aspect) 512x288 (16:9 aspect) (long file up-scaling macro-blocked)
576x432 (4:3 aspect) 576x324 (16:9 aspect) (short file down-scaling macro-blocked)
I exported from FinalCut into a QuickTime file, the file size is 485MB. Then I used QuickTIme Pro to change the movie into the above frame size, and add a letter box. The resulting file is over 6GB in files size! How can this be? I used no compression and these settings: no compression, millions of colours, Best Quality, Apple Lossless sound, 48.000MHz, Mono.
To me, a "QuickTime file" is anything you can stuff into an MOV file container, or a more loose definition, anything compatible with the QT Player and currently installed QT components. With regard to going from 485 MBs to 6 GBs, your file size is directly related to the total (audio + video) data rate used for compression. Not compressing a video makes it bigger while the higher the compression, the smaller the file.
The reason for not compressing is that Viddler will compress on its servers (into Flash). Any hints? I must stay under 500MB to upload the file to Viddler.
Since the target for the Flash target conversion is 448 kbps (400 kbps video + 48 kbps audio), the same staff member recommended H.264 multi-pass video compression at 768 kbps and AAC mono audio compression at 64 kbps with a sampling rate of 44.1 kHz. Splitting the difference between the staff recommendation and your apparent worry about quality loss during re-compression, I would suggest this as a maximum level of compression and likely try a total data rate in the 1500-1600 kbps range which should yield something on the order of 12.25 MBs/min for output for initial tests. You can, of course adjust rates up or down depending on the duration of your file upload in order to meet the 500 MB limit and satisfy quality considerations.

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