Video
Cutting Captured Video - 2
The Capture stage
This is just a case of identifying the section you want to capture from tape, and running the capture program in the normal way.
You can take advantage of the preset capture time facility of most capture programs, or use the device control features of DV, to capture the required section.
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Most capture programs allow you to pre-allocate the capture file before you start capturing. What this does is to create an empty file of the size you specify on the disk before capturing, and then the captured video data is written into this file. If you don't do this, the file simply grows in size as needed while the capture proceeds. However, as the file grows, Windows has to update a special area on the disk called the allocation table at the same time. This results in extra disk activity and could result in dropped frames. |
I also recommend pre-allocating the size of the capture file (right). Multiply the capture time by the average data rate, according to your quality settings. The data rate of DV is fixed at approximately 3.5 MB/sec.
If you are controlling the camcorder manually, start the tape a few seconds
before the first shot to avoid any tape-start "wobbles", and
set capture running about a second before.
If you do everything on a single disk partition, make sure you don't use more than half the available disk space, since during the cutting stage you will copy the whole capture file a piece at a time.
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