På Thu, 15 Nov 2012 16:21:31 +0100, skrev Monty Montgomery
<[email protected]>:
(Hm, if this is workable, it might be worthy a test suite...)
There's a reason for the historical "CLACK! Action!"
Yeah, but then they had optical sound-on-film, so you could _see_
the clack peak on the soundtrack.
Or you could run the audio slooowly through the player, back and forth,
until you had homed in on the clack. Then you could set a crayon mark
at that point. Same procedure with the film strip.
You can't do that when you try to measure the offsets between audio
and video outputs from the computer. The offset may be short enough
to be hard to gauge manually, yet large enough to be disturbing.
And you can't work around that by playing back and forth at low speed.
Any significant offset will be detrimental when you line up audio
and video manually, or try to correct synch drift in Cinelerra.
It's like doing colour correction wearing tinted sunglasses.
--
Herman Robak
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