Re: AVCHD Long Term Backup?
- From: "Ken Maltby" <kmaltby@xxxxxxxxxxxxx>
- Date: Wed, 2 Apr 2008 01:46:58 -0500
"Justin" <Justin@xxxxxxxxxxxxxxxxxxxxxx> wrote in message
Richard Crowley wrote:
Ken Maltby wrote:
P.S. This might be a good choice for an easy interface to the
Pricey and difficult to use.
What does the average layman do? m in IT so I understand that crap, but
most people don't.
It doesn't seem that pricey compared to the other tape
backup formats that have been discussed here recently.
You'll have to explain why you think it is difficult to use?
Let me ask you this, what steps are involved in that method of backing up?
Capture to the PC, and write it to the hard drive,
There is no "Capture" involved, for DV-25 there is a real-time
transfer stored on the hard drive as "AVI", HDV comes from the
camera as an MPEG2 transport stream stored as .ts or something
similar. All the digitizing was done in the camera. Now with this
approach the video is already on digital tape, but this is not likely
the case for the OP of this thread; as he was talking about AVCHD.
AVCHD is already in a file format; either on a built-in hard drive in
the camera or on a DVD that the camera has made. ( I have the
impression that he has a DVD model, and was wisely concerned with
the DVD's archive abilities.)
open up the Backup software and write it to that.
As you should know, most backup software can be set to backup
a designated directory/folder as a default. So it can be as easy as
inserting the tape cartridge. Then anything new in the directory would
be added to that tape.
I can tell you right now very few people will want to do that.I don't see why not, if they want a long term storage capability
for their Tapeless cameras. One of the advantages to the DVD,
Flash Card, and hard drive cameras, is that the video files can
be moved to the editing computer at faster than real-time.
Then when the time comes to remake those DVDs that rotted away, one has to
get the tape, hope to htelol that type of tape drive is still around,
restore and fuss with that video file.
With miniDV and HDV its record, capture, store the tape somewhere and
forget about it.
As an IT person, you should appreciate that there certainly
are many more DAT, SDAT, VXA, AIT, and LTO drives
made worldwide than even Mini-DV cameras. While I
believe Mini-DV/HDV playback capability will be with us
for a very long time, these storage formats will certainly be
usable for the 30-40 years you can expect for such backup.
( Most of us rec users of the PC are not aware how tiny the
non business computer market is in comparison.)
It is overkill (and overpriced) for storing DV25 data (as on a mini-DV
tape cassette). But storing actual bit-perfect
computer files is a diffrent problem than storing DV25-
compressed video at a perfectly acceptable level of absolute reliability
(which is <100% because of good
error detection and mitigation.)
Bottom line is that it is still cheaper, more convienent
to store DV on mini-DV tapes (especially since you can
write them directly in a camcorder). and of at least equal
reliability with storing video on VXA. However VXA seems
like a nice price/performance point for relatively small-scale
home users who want a reasonably reliable tape-based data
backup solution. Thanks, Ken.
Sure, if your camera makes video on tape, that makes storing
it away pretty easy, and it is quite a lot cheaper.
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