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Optimizing Windows for Video CaptureThe following tips were provided by Mike Rivers, one of the top tech support guys at Quadrant International. Although the tips are for the Quadrant Q-Motion card, users of any video capture board will find them very useful. The Win95 tips are excellent, and should be followed by all. Win95 defaults to a couple of settings that are the exact opposite of what we want for the best video capture/playback results! |
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After defining your scratch disk, open a capture window and select CAPTURE FILE. There you are able to select PREALLOCATED FILE. If you select O.K. you will be able to enter the size of this file (we are using 256MB). This file should be generated on a defragmented partition. More consistent rates can be achieved if you turn on "Capture Directly to Memory" in the Recording Options menu. This will tell Premiere to use its own buffer before writing the video stream to the hard
drive.
Also, because video is actually 29.97 frames per second, some machines may
work better if you set the frame rate to 29 frames per second instead of 30
frames per second. That three hundredths of a frame per second makes a
difference in some places.
Q-Motion Drive Performance Tips-1 (Windows 3.1, 3.11)
Under Control Panel/386 Enhanced "Scheduling" may be set as follows:
Windows in foreground: 10000 [default 100]
Windows in background: 1 [default 50]
[x] exclusive in foreground [default off]Use as small a cache as possible
Windows typically reserves 1/4 of physical RAM for cache in the virtual memory section of Control Panel/386 Enhanced. Try smaller cache sizes between 2Mb and 128kb depending on your system configuration. Try turning cache off completely.
Checklist:
Special Windows 95 section
Under Windows 95, go to Settings/Control Panel/System, click the
"Performance" tab, and click "File System". There, you will find "Read ahead
optimization" set to "Full". Change it to "None". Then click the
"Troubleshooting" tab and put a check mark in the "Disable write-behind
caching for all drives". We don't want the drives to read ahead, look
behind, or do anything except read and write the video data stream.
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