Re: Converting MKV to AVI [SOLVED?]

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On Tue, 2010-05-11 at 16:42 -0400, Tom Horsley wrote:
> Now if we could only solve the ultimate mystery: Why the folks
> designing video standards selected audio and video frame rates with no
> common divisors :-).

Well, I'll blame computer geeks who don't think things through like
engineers, for a lot of them.  Much of the digital video schemes seem to
have been purely to squeeze data down to a rate that works across dial
up, or allows sending of small files.  It's obvious that quality was not
the main factor.

For decades, the goal of film production (the actual film that goes into
the camera) was to make it better and better.  Digital video, on the
other hand, has been trying to work out how little data they can get
away with.

I work in video production, and have resisted the move from analogue to
digital, as much as I can, for the reason you brought up, amongst one or
two others.  Such as a plethora of incompatible standards, permanent
storage issues...

The early digitisation schemes had non-synchronous sound and pictures,
they just drifted along, and would only stay in sync by pure luck of the
clock rate of your sound card (which would change with temperature, and
be different from other people's).  Capture and playback used completely
separate audio and video hardware.  For anything more than a few minutes
of video, you'd have to resample the audio to compensate, and the
resampling was a highly experimental, and time consuming, trial and
error method to work out the factor.

It was obvious to me, from the few minutes of trying to use someone
else's digital edit suite, that there should be an exact, and
synchronised, relationship between video and audio.  Quite how someone
could spend months, or probably years, developing a system that didn't
work that way, without realising the problem, is beyond me.

-- 
[tim@localhost ~]$ uname -r
2.6.27.25-78.2.56.fc9.i686

Don't send private replies to my address, the mailbox is ignored.  I
read messages from the public lists.



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