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//Advanced rendering with Vegas Video
This tutorial will teach you more about rendering video files.
There are other good codecs out there, but i will be discussing the Windows Media Video 9.1 codec in this tutorial. I find it simple to use and it has nice output results.
To access all the things below, click:
File > Render as...Save as type: Windows Media Video V9 (*.wmv)
Beside the Template: option there is a Custom button. Click it. This is where the rest of this tutorial takes place.
//Part 1 - Quality
If you are a quality freak like me, select Best from the Video rendering quality: drop down list.
Using best quality takes a large amount of CPU usage and rendering time. I only use it for my final renders. If you are only sending a short clip to a mate or previewing something, leave it set to Good.
//Part 2 - Audio
For best quality to compression ratio, i use CBR (Constant Bit Rate) audio at 128kbps, 44kHz, stereo (A/V) quality.
//Part 3 - Video
I find i get the best results when using VBR (Variable Bit Rate) with a peak setting. This setting makes the video quality average out at the desired bit rate, while allowing the quality to increase in colourful areas and decrease in dark areas. This dynamic bit rate avoids wasting large amounts of data during dark transitions etc...
I use the custom image size of 800 x 600 @ 30 frames per second. If you try to compress at 1024 x 768 you will lose colour data and it looks washed out. Unless of course you use massive bit rates but then no one will want to download 200mb files for only 20 seconds of footage :P
The seconds per key frame is the distance between each "compression point". If they are closer together, it looks smoother, if they are too far apart, it looks ugly. Putting them close together also increases file size. I find 3 seconds per key frame is the best balance of quality and file size.
As for the bit rate, i have tested many and use 4 M (4,096kbps) as the average bit rate and 5 M (5,120kbps) as the peak bit rate. The final file size generally ends up about 600kb for every second of footage. A 5 minute video is therefore ~ 180Mb.
//Part 4 - Author attributes
The final page in the render options dialog is called Index/Summary.
This gives you the option to put in copyrights, authors etc...
Fill it out as you wish and click ok.
Now save the video where you wish and get another coffee as it will take quite some time to render.
Hope this helps!