Anyone know how gametrailers.com encodes their HD WMV Videos?

[Mysteriouskk]

When I check out the properties of their HD videos for WMV, I see that most are around 3300 kb/sec for video, but when you compare that to their file sizes of the videos, they add up to less than that. How can they make their videos use that bitrate, but end up with video sizes that are smaller?

[poisondeathray]

The .wmv versions use WMV3 (Windows Media Video 9), probably by using windows media encoder

As for the size discrepancy, a kilobit is not the same as a kilobyte

[Mysteriouskk]

Right, but when you compare bitrates and sizes, they don't match up even converting from bits to bytes.

[poisondeathray]

How much are they off? Did you account for audio & video streams? The "extra" might be due to the overhead - I'm guessing

[Mysteriouskk]

But the final video size is less that the size it should be based on the bitrate.

[poisondeathray]

It works out on the sample I just tried (BTW, awesome trailers)
I downloaded this http://www.gametrailers.com/game/2706.html in the wmv format

I used mediainfo to generate this info:
file size : 9.09 MiB
PlayTime : 23s 589ms
Bit rate : 3233 Kbps

I went here to do the conversion (bits vs. bytes)
http://www.speedguide.net/conversion.php

So (3233/1000) = 3.233 Mbps
3.233 Mbps x 23.59s = 76.263237 Mb
Plug in 76.26Mb into http://www.speedguide.net/conversion.php = 9.09MB

(b=bit, B=byte)

Seems to work...