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Archived from groups: rec.video.desktop (More info?)
Lot's of the historical threads touch on this but never quite seem to
address it directly.
The Canopus ADVC units use a Canopus-proprietary codec. This causes
me several points of confusion.
1) Does this mean only that the algorithms which generate the output
format (DV I/O) are proprietary --OR-- does it mean that the output
itself -- meaning the payload riding through the firewire -- is in a
proprietary encoded format???
2) To get from DV I/O to even the least-processed DV file format
(whatever that is), doesn't the PC software need to understand the
encoding of the DV I/O signal? Or, is there actually a processing
path which takes DIF sequences off the wire and simply blasts them
serially into a raw file dump? And, if so, what is the resulting file
format called? Is this what AVI actually is? But no, this can't be
what AVI is because AVI comes in at least a couple flavors, which
implies processing, right?
I'm a pretty expert Googler and an engineer to boot! But, I've tried
on several occasions, for hours at a crack, to find a lucid
explanation of what's really going on here and so far I've got bupcus!
Lot's of the historical threads touch on this but never quite seem to
address it directly.
The Canopus ADVC units use a Canopus-proprietary codec. This causes
me several points of confusion.
1) Does this mean only that the algorithms which generate the output
format (DV I/O) are proprietary --OR-- does it mean that the output
itself -- meaning the payload riding through the firewire -- is in a
proprietary encoded format???
2) To get from DV I/O to even the least-processed DV file format
(whatever that is), doesn't the PC software need to understand the
encoding of the DV I/O signal? Or, is there actually a processing
path which takes DIF sequences off the wire and simply blasts them
serially into a raw file dump? And, if so, what is the resulting file
format called? Is this what AVI actually is? But no, this can't be
what AVI is because AVI comes in at least a couple flavors, which
implies processing, right?
I'm a pretty expert Googler and an engineer to boot! But, I've tried
on several occasions, for hours at a crack, to find a lucid
explanation of what's really going on here and so far I've got bupcus!