I seldom read user guides, but wanted to expand my use of VS9. I was looking at certain things and one it says to Disabling Write-Behind caching. I was wondering is this necessary? I have never done it, but does it help in working with large video files. I have to assume it has some purpose in the process?
Thanks Bruce
Disabling Write-Behind Caching. Is it necessary?
Moderator: Ken Berry
Hi Bruce,
the manual recommends disabling write-behind caching on your CAPTURE drive. It helps to reduce the possibility of dropped frames when capturing.
It might even reduce your hard drive performance for things like copying and writing files, but it's highly recommended for video capture.
When you capture any video, make sure you have the "drop frame counter" turned on - you can then check to see if you are dropping any frames during the capture process.
And read the manual - as well as the "sticky" announcement about the "recommended procedure" at the top of this forum!
the manual recommends disabling write-behind caching on your CAPTURE drive. It helps to reduce the possibility of dropped frames when capturing.
It might even reduce your hard drive performance for things like copying and writing files, but it's highly recommended for video capture.
When you capture any video, make sure you have the "drop frame counter" turned on - you can then check to see if you are dropping any frames during the capture process.
And read the manual - as well as the "sticky" announcement about the "recommended procedure" at the top of this forum!
JVC GR-DV3000u Panasonic FZ8 VS 7SE Basic - X2
-
THoff
Personally I would not disable write-behind caching.
The recommendation to disable this feature is based on the premise that if something (Videostudio?) crashes, disabling write caching will have a better chance of getting you the whole file, at least up to the point where the program crashed.
The problem with this is that if something crashed, you still don't have a complete capture and will likely have to do it again (at least partially), and then combine multiple videos manually. But disabling caching also increases the chance of dropped frames throughout the entire video, which in my opinion is worse than having two segments that are good but must be spliced together manually.
Videostudio (especially V9) is very stable on my system, and unless you have issues with yours, I strongly recommend leaving caching enabled -- otherwise you will be trading one bad problem for a worse one.
The recommendation to disable this feature is based on the premise that if something (Videostudio?) crashes, disabling write caching will have a better chance of getting you the whole file, at least up to the point where the program crashed.
The problem with this is that if something crashed, you still don't have a complete capture and will likely have to do it again (at least partially), and then combine multiple videos manually. But disabling caching also increases the chance of dropped frames throughout the entire video, which in my opinion is worse than having two segments that are good but must be spliced together manually.
Videostudio (especially V9) is very stable on my system, and unless you have issues with yours, I strongly recommend leaving caching enabled -- otherwise you will be trading one bad problem for a worse one.
?? Whose premise? The note by the checkbox in the policies tab of the hard drive properties suggests that when enabled "a power outage or equipment failure might result in data loss". My understanding is that it need not necessarily be a full blown program crash, but any sort of glitch with all manner of causes.THoff wrote:The recommendation to disable this feature is based on the premise that if something (Videostudio?) crashes, disabling write caching will have a better chance of getting you the whole file, at least up to the point where the program crashed.
From my own experience, I've never suffered dropped frames when capturing*, and always disabled write-caching on the capture drive. (and I usually re-enable it after capturing)
Perhaps it's less important on high-end systems.
I suggest Bruce tries some test captures, with and without write-caching, then perhaps he can see if it makes any difference on his own system.
*except once when I omitted to set the power profile to "always on"
JVC GR-DV3000u Panasonic FZ8 VS 7SE Basic - X2