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Pastimes : Computer Learning

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To: SI Ron (Crazy Music Man) who wrote (82469)7/9/2013 9:56:23 AM
From: Jeffrey S. Mitchell  Read Replies (1) of 110626
 
See below advice I found:

In 1995, when DV camcorders first hit the market, firewire ports ran at 400 Mb/s. USB 1.0 entered the market in 1996 at 1.5 Mb/s. In 1998 USB 1.1 was introduced at 12 Mb/s. DV transfer requires about 29 Mb/s. So USB 1.0 and 1.1 were too slow for DV transfer. Camcorders that offered USB ports used them for still images or highly compressed and downscaled (typically ~352x240 MJPEG) video, not for full DV (720x480) video. In the year 2000 USB 2.0 was introduced at 480 Mb/s. That was fast enough for DV transfer but few camcorders were ever manufactured that could take advantage of it.

Capturing via firewire (really just a digital data transfer) will give you an exact copy of what's on the DV tape. Using an analog capture device will give lower quality because the digital data on the tape is converted to analog (quality loss), sent over an s-video or composite cable (quality loss), digitized again (quality loss), and probably compressed again using a lossy codec (quality loss).

forum.videohelp.com

I guess I now need to buy a PCMCIA fireware card with a TI chipset.

- JEff
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