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Posted by Frank on 10/05/02 11:38
On Sun, 29 Jan 2006 02:58:15 GMT, in 'rec.video.production',
in article <Re: HDV capture on under-powered PC>,
"Nappy" <noemail@all.com> wrote:
>
>"Frank" <frank@nojunkmail.humanvalues.net> wrote in message
>news:ed0mt1lmmbls31cmnejgrauvr5gl2nm413@4ax.com...
>>
>> Others decompress the (long-GOP) HDV MPEG-2 Transport Stream into an
>> I-frame-only MPEG-2 Program Stream and write an .mpg file to disk.
>> Here, obviously, a codec is involved, although all that it's doing is
>> a normal MPEG-2 decoding operation. No quality loss is involved.
>
>that makes editing easier..!
Much easier, since most of the work is already done.
The other point that I was trying to make is that no quality loss
occurs when decoding a lossy compressed video stream (or a lossy
compressed audio stream, for that matter). Rather, the loss took place
when the original uncompressed (non-compressed) material was encoded
using a lossy codec.
This may seem like just a matter of semantics, but to me at least,
it's an important distinction to make, probably because I'm
continually striving to maintain the highest visual and aural quality
levels technically possible with the tools available to me.
>Great post Frank.
Thank you. Just trying to keep things clear both in my mind and that
of others, including future generations who will read all of these
diatribes on Google Groups hundreds of years from now. :)
--
Frank, Independent Consultant, New York, NY
[Please remove 'nojunkmail.' from address to reply via e-mail.]
Read Frank's thoughts on HDV at http://www.humanvalues.net/hdv/
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