Video tape formats vary in their ability to capture picture detail. This characteristic is measured as lines of resolution. 160 lines Formats with more lines of resolution are capable of producing higher-quality movies. Which format to use depends on how large an image you want. If the vertical dimension of the movie is less than the lines of resolution reproduced by the tape, no line of the movie will need to be filled by interpolation because video data is missing.
Interpolation can result in fuzzy movies that seem out of focus.
Composite video is the lowest in quality, and component video is the highest. This enhances not only the movie's appearance, but also performance from a CD-ROM disc. In general, hardware compression on the capture board greatly increases movie capture performance. Speed of the computer's hard drive - the faster the hard drive, the faster the computer can read and write data to and from the hard disk. As a general rule of thumb, the video data transfer rate will be about half the data transfer rate of the drive.