file size increase upon render

[Ali Jafri]

Hi people. I've just downloaded a 8MB zipped video file. When unzipped it came out to 18.5 MB. That in itself was new to me! I thought video files couldn't be zipped so effectively. Well anyway, the file has a .MOV extension, Gspot tells me the recommended display size is 1152 x 836, it runs at 10 FPS and is encoded in QT Animation (RLE). The audio codec is IMA 4:1 16-bit.

I imported this file onto Vegas 7 making sure I was using the recommended frame size etc. I did some minor edits and boosted up the audio a little. And then proceeded to render it out. I wanted to keep the same attributes while only changing the frame size from 1152 x 836 to a smaller 800 x 600.

What's happening is that when rendered out in Vegas I end up with a MOV of around 135 MB!!!!! But why????? I'm using the same attributes as in the original file, I'm even reducing the frame size!!! Then why is my render so much larger than the original???????

Please help!

[Ali Jafri]

Okay I think I've figured out why the file size is so large. It has to do with the bitrate. The original file is 600 and my render is showing 3400. The only thing is that when I open the dialog box in Vegas for rendering it doesn't give me an option to set bitrate, at least not with the Animation preset in quicktime. I can set the bitrate for sorenson 3 or cinepak or H.263 and the render size is even 15 MB but the quality of the video sucks!

In vegas how can I choose the Quicktime animation preset and also set my own bitrate? Or do I have to render it out and take it into procoder or some other transcoder?

Anyone?

[Josh Chesarek]

You are correct about why the file size jumped. I however don't use vegas so I cannot offer you directions on how to set it when encoding with Vegas. You might get a better response in the Vegas forum or check the help settings for that codec.