Clipstream Video: Frame Rate Demonstration

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Here are a series of video samples that have similar settings. Note the range of qualities achievable at different frame rates within the same bitrate. This page is a high-speed demo requiring a connection speed of 650 kbps or higher. Viewers at lower speeds will cache the files for a buffer-free second playback.

To reduce CPU load, lower dimensions and quality settings are generally recommended for higher frame rates.

If you are not seeing graphics and video, your email reader or web browser is not equipped to show Java rich media. Please visit http://www.clipstream.com/help/visitorhelp.shtml to learn how to enable your client for rich media.

Seek to 45 seconds

Play:	Settings	File Size
Version 1	-i -v -t4,4,4,4 -b650000 -a32000 -f10.00 -q80,65 -w472	13,577 KB
Version 2	-i -v -t4,4,4,4 -b650000 -a32000 -f12.00 -q80,65 -p114000,return_of_the_king_title.jpg	13,947 KB
Version 3	-i -v -t4,4,4,4 -b650000 -a32000 -f15.00 -q70,55	13,725 KB
Version 4	-i -v -t4,4,4,4 -b650000 -a32000 -f18 -q57,45 -w432 -y	13,421 KB
Version 5	-i -v -t4,4,4,4 -b650000 -a32000 -f20 -q55,40 -w432	13,824 KB
Version 6	-i -v -t4,4,4,4 -b650000 -a32000 -f24 -q57,40 -w400	13,885 KB
Source File:	.mov Quick Time 6 required - 472 wide x 200 tall - 24 fps	27, 561 KB

As the frame rates rise, the CPU requirement is also more demanding so the viewer may experience poor playback or a browser freeze. Browsers using the Microsoft JVM will run slightly more efficiently than those with Sun Java.

CPU load and file size (bitrate) are limiting factors. To work with higher frame rates, here are some strategies for smooth playback:

lower the quality range
lower the dimensions
increase the bit rate
work in factors of the source file frame rate