Kdenlive is reported to work on recent computers, with at least:
32bits or 64bits computers with a modern Processor (AMD64 or Intel mono/dual core systems).
A fast hard disc with more that 20Gb of free disc space.
A firewire interface for camcorder capture.
At least 1Gb of RAM.
Screen size : 1024x768 or more.
Any computer produced after 2005 should meet these requirements. You may only need a firewire interface.
For advanced use and semi-professional work, we recommend investing in a recent computer with:
AMD Phenom Quad-core processor.
4 Gb of RAM.
Three SATA disc for RAID-5 usage (Any Linux distribution offers RAID-5 witout additional controller).
A recent video card with dual display.
In december 2008, some European retailers offered this kind of hardware for 500€, with one large screen. This is at least 4 times less than the equivalent under other operating systems. Don't spend your money in software licences for closed environment: buy camcorders and make films.