Good! That's the perfect project to shake out the system.

It's a form of parallel difference/"RLE" compression (for lack of a
better "term"). I'm not too knowledgeble in regards to the math
descriptions and whatnot. I'm preparing to add 10/12 bits
now to see how well it does there and then it's on to converting
it to assembly because it takes around 500ms per frame now
(1280 x 720) which is way too long. It will have to drop to a max
of 30 ms to support 30 fps recording for example.

I've tried to design it for speed (in the way that it works, not
in the implementation yet!) and one pass encoding instead of
dual passes or dictionary/huffman type encoding which would
probably be way too time consuming. We suffer in compression
efficiency, but it is a lot better then I thought it would be. Since
it is not a fixed compression ratio algorithm like DV is it will
fluctuate in size as well depending on content, so we will have
to wait and see how well it will do in the real world.

I will not make it available till it is completely ready, Rob S. will
be testing with me and if it is fast enough it will be implemented
in his camera firmware.

guys, here is what a DOF adaptor can do for miniDV cameras!

check out this shot from a take in the spot I am working on now:

www.dv3productions.com/test_images/DOF shot.jpg
www.dv3productions.com/test_images/DOF shot2.jpg
www.dv3productions.com/test_images/DOF shot3.jpg

tell me that does not look like 16mm film?? ;) I do love this "look" with that shallow DOF!

Les...really I don't care about HDV..like I said I thiink it's total CRAP I have had my hands on it and unless your doing DOC work it stinks bad...have you done any CC work with it? I have and as soon as you try it has HUGE mpeg2 artifacts..so I really don't care...I jsut think its crap that's all ;)

Rob L.,

Will we be able to turn it off (compression) if it's eating too many processor cycles for recording at high-speed (i.e., 48fps)?

I hear yah man. I thought DV was bad, HDV . . . oh no . . .

But ... it's high definition, it must be good! ;-)
I'm the wrong Rob (:-) but I'll answer anyway: Yes.

Hey guys,

Not too sure about this, but can you connect an Ultra 320 drive to an Ultra 160 card? Just curious since the Seagate Savvio looks like the perfect drive for what we need (2.5" 10K drive), but it's U320, and I can only find 68-pin U160 Mini-PCI cards.

But it transfers the same amount of data and concumes more or less the same as the Raptor with its SATA interface, Jason.
Are you sure?


http://www.seagate.com/cda/products/...84,610,00.html

But one's a 2.5" drive in comparison to a 3.5" drive. You can stuff 4 2.5" drives in the same space as one 3.5" drive.

Also Ultra 160 is just as fast as SATA.

Really?
Try this: Show some HDV and some DV to some laypersons on an adequate monitor . Ask *them* which one looks better. Artifacts and all.
Everybody I've shown the stuff to picks the JVC footage.

-Les




<<<-- Originally posted by Rob Scott : But ... it's high definition, it must be good! ;-)
I'm the wrong Rob (:-) but I'll answer anyway: Yes. -->>>

Whoops, I'm nailed. I should have stayed out of that one -- I've never shot HDV :-)

sure HDV "looks" better...but it's not..in the thinking of working with it..YES it is HIgh RES..but it's full of artifacats!! like I said try and CC the stuff..and then you have to recompress it!

anyway this is not about HDV, it's about 4:4:4 10bit single CMOS cams..and they look MUCH better then the NDV format will ever look unless they up the bitrate

I will have the 3300RGB from Silicon Imaging next week...will keep everyone posted!

Very Cool Obin.

BTW, you gotta check for that smearing ;-)

Are you going to be running at the full 1920x1080, or keep back down at 1280x720?

Also has anybody tried doing a sound-sync test, say of a minute or two of footage?

In other words, I'm wondering with these cameras, with sufficient resources, shouldn't you be able to record till you fill up your hard-drive? Are their any indicators when you start or have dropped/missed a frame?

yes I have seen Smear tests Jason and no it does NOT seem to have any smear!!

Hmm,

That's good. Depending on how noisey the chip is then, at 10 bit you should be able to get around 6-7 stops without banding.

BTW, enjoying your hurricane :)

NHC has us under tropical storm warnings right now. Nice wet day . . .