Just when you think you're beggining to know something -

[kenackr]

I've done a lot of searching and reading about many topics connected with shooting decent video, editing it, and putting it on DVD /tape.

Like many people, I keep wondering if there isn't a better medium to go to than tape (mini dv in my case) and that leads ultimately to hard drive storage.

It's been made quite clear that one can't record directly to a firewire HD and you must go through something like DV rack, that can then record it to disk. Or you have to use Firestore or similar products that can deal with raw firewire signal.

While I understand and believe that message, when I think about it, I can't yet understand the reason why.

That means that I'm obviously missing knowledge about what processing of the digital signal coming down the firewire cable is required to enable it to be recorded to disk.

If the signal represents digital stream (1's & 0's) coming from the CCD's what else is required beyond: file name, start and stop, and any other identifier information (location, codec, etc) required to go to disk?

Is it simply that "container packaging" file information is missing ?

Enquiring minds want to know!

Ken

 

[Barry_Green]

Hard drives speak French, cameras speak German. There has to be translation going on.

In other words: hard disks use a protocol called SBP2 (serial bus protocol 2). That's what they "speak". It's a file transfer protocol.

Camcorders and decks and other video gear don't use that protocol at all, they speak A/VC (audio/video control). They send a streaming packet of data, not individual files.

So it's a totally different language. You need DV Rack or a FireStore or something like that to receive the A/VC data stream and interpret it into file storage protocol that the hard disk can record.

 

[kenackr]

Mai oiu, Mssr. Green,

Ach du lieber!

Is this covered in your book? My Dvx 100B is in shipping and according to UPS will arrive next Thursday. After that it could be up to 6 weeks before the Panasonic rebate agent decides to ship the rebate and your book, etc.

As a C.S. grad, I understand the concept you are explaining, but do not have access, at this time, to the underlying details, so it is still somewhat Greek to me. These things are usually deeper than the average bear cares to know.

Could you direct me to a source where I might learn more about the details? I'm just one of those nerds who really likes to understand the details. I f you have any questions about nuclear energy or physics, I'd be glad to reciprocate.

Thanks,

Ken