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Posted by Richard Crowley on 03/11/07 14:45
"Steve King" wrote:
>>"P." wrote ...
>>> Commonly, would it be possible to transfer a recorded
>>> material from a miniDV camcorders to my Pioneer
>>> DVR-645H-S wich is equipped with hard drive?
Why? What would be the reason to transfer to the HD in
your DVD writer?
>>> And if yes, would there be any quality compromises,
>>> since I would transfer from a tape onto a hard drive?
>>>
>>> This recorder has a DV terminal IEEE1394.
Transferring from tape to hard drive normally involves NO
quality compromises if you are transfering DV via Firewire
into an AVI (or MOV, etc.) file. Every one and zero gets
transferred straight across without change.
HOWEVER, I strongly suspect that video (whether analog,
or digital) gets encoded into MPEG for storage on the hard
drive. It is this real-time, one-pass transcoding from DV to
MPEG that likely causes significant compression.
>> Not until you burn it to DVD, then the usual compression
>> issues apply. But, we've grown used to DVD quality, right?
I don't believe that is the case. I suspect that the video was
compressed to MPEG (DVD) before it was written to the hard
drive.
"John" wrote ...
> Isn't ALL consumer digital video and most professional video
> compressed?
Yes, of course it its. 99% of the people who have ever seen
a TV screen have NEVER seen uncompressed video. Including
virtually everyone who reads this newsgroup. You would be
simply amazed at what uncompressed RGB video is capable
of. Simply encoding to NTSC involves significant compression
of the color information, and recording to DV subjects it to a
bit more "compression".
Further compression to MPEG for DVDs causes even more
visible, irretrievable loss. And it is even worse for the "on-the-fly",
one-pass kind of MPEG compression we see in consumer
equipment (vs. the hand-tuned and budgeted, 2-pass
compression they use to make commercial DVD releases
of Hollywood movies, etc.)
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