Shaun Roemich |
October 2nd, 2009 06:53 AM |
Quote:
Originally Posted by Harm Millaard
(Post 1421501)
In addition to the valid remarks made by Peter, keep in mind that component video takes more space than HDV or AVCHD, so the fill rate on your disk will go up rapidly and your performance will go down.
|
What Harm says is by no means incorrect but a clarification here may help:
Component is how the video is coming into the system but has no bearing on how much storage is actually being used. That is a factor of ONE thing - the bitrate of the codec being used, in this case MJPEG, which we can assume to be reasonably high, ESPECIALLY when compared to AVCHD or HDV.
In practice, it's normally one of two things that make a system "fail" to capture:
- Either the hard drive speeds aren't high enough for the BITRATE of the codec writing to them or;
- The processor speed isn't high enough to keep up with real time transcoding of the data (whether analog or digital) coming in to the codec of choice. For a while, you can get away with not quite real time encoding in some systems as you will probably buffer to memory (or swap disk) but at some point if data is coming in faster than it can be transcoded, your capture will fail when you run out of buffer.
AVCHD, HDV and other long GOP MPEG formats require far more processor speed to transcode than they need hard drive speed to "keep up".
|