If I were trouble shooting,


If I were trouble shooting, this is what I'd do…

If the video plays fast & how you wanted it to, in the time line before render, I'd say the video card is fine.


If the video plays fast, but NOT the way you want it to, as in sample you provided, the problem is in the render which could mean many things.


It could be hardware or software;  the CPU or the RAM itself, or the RAM buffer (bottle neck) Hard drive buffer, the program or the frame rate you chose.


Try rendering your problem section at half the speed you chose. If it is problem free, up the speed until you find the % that is giving you the problem. I would also recommend you trying a multiple of your frame rate such as 240 instead of 200% just 360 instead of 300% just incase the GOP is somehow tied in.


For hardware there are RAM check programs (I use http://www.memtest.org/) and for hard drives the built in CHKDSK can find sector errors where your render image may be getting drop outs. If you are using HD, and your raw footage, program and render export are all on the same drive, you are probably experiencing a bottle neck in you computers ability to transfer information in, out and through the system. Seperate drives for your raw files, your NLE and output are highly recommended.



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