jlames and others who can help, I have a question....

D

Drew Harty

Member
Jonathan,

I read your post about recording component out of your HD100 and had a couple of questions.

If my math is right, capturing 720 60p uncompressed from the
component out of the camera means you need about 198 gigs storage per
hour. (1280x720x60 = 55.5mbps x 60 = 3.3 gigs per minute x 60 =
198 gigs per hour.) This may be an embarrassingly basic question,
but does this mean you need 55.5 mbps throughput on your raid storage
to capture this as well? (I assume yes but am not completely sure.)

Have your tried capturing 60p or 30p or 24p uncompressed from the
component out on the JVC HDV deck for editing, and would this then
mean that you would need a sustained throughput of approximately 27
mbps to capture 720 30p from the component out of the deck? Since
fast SATA raids are relatively cheap (and 4 SATA drives give you
close to 200 mbps throughput) , I was wondering if capturing
uncompressed 720 30p out from the deck might be a reasonable way to
edit HDV recordings in an I frame format without getting any further image degradation to the original. Any thoughts?

Thanks,

Drew Harty
 
Actually, I'm not a math whiz by any stretch of the imagination but we are going to be using the JVC HD100s at 1280x720 resolution at 4:2:2 and streaming 60 down the component outputs to probably the Wafian device. Conventionally, HDV only supports 30 fps at 4:2:0 with half of the frames and vertical chroma resolution lost via the tape and compression format but we'll be bypassing the 100's compression and recording the full 720p60 4:2:2 signal directly to disk. With 2000 GB of RAID 1 mirrored and striped on the system, they tell me I'll have a full 18 hours of footage per unit and with the same amount of raid 0 we'd get 36 hours. We're opting for safety reasons for the mirrored at 18 hours. That means we'll be eating up about 111 GB an hour so between your 198 and my math's 111, I'm not certain where the difference is going. This being Sunday, Jeff Sheldon, our Chief Tech who also owns Sheldon Media is usually in church with us but I didn't see him there this morning. I've got a call into him now and will post the results when I hear from him.
 
[SIZE=+0]That's what we're looking into this week. In moving from SD to HD, we're standardizing on equipment. It took us six months and the better part of $10k to test all the cameras and settle on the JVC for our show style which employs purposefully sub $10k cameras whose performance, when set up correctly, is virtually indistinguishable form the Sony 900, 950, Thompson Grass Valley, etc. I know there's substantial argument that these cameras offer attributes that sub $10k cameras can't provide but those attributes are more cinea-related and not television.[/SIZE]
[SIZE=+0][/SIZE]
[SIZE=+0]We're also through audio which pretty much matched what we have already been using which is why I took such exception with misterjulius whomever that was who, in his professional opinion, could tell we were using "Sennheiser..." when we were no where near that equipment. Get a life, pal. You're not that good.[/SIZE]
[SIZE=+0][/SIZE]
[SIZE=+0]Now it's off to throughput and storage. There's six systems we're investigating for the show and as we set the show up, I'll keep the board posted.[/SIZE]
[SIZE=+0][/SIZE]
[SIZE=+0]What we have planned for the Board, which right now only Full Rez knows about and we've sworn him to secrecy, will really entertain and benefit substantially all who read this forum. It'll be starting in early April and the show will commence shooting live on April 12th with daily updates. Until then, I appreciate all the input I can get like this one. One teaser. George Dibie ASC is heavily involved. That should peak your interest!!![/SIZE]
[SIZE=+0][/SIZE]
[SIZE=+0]See you all soon.[/SIZE]

[SIZE=+0]Jonathan[/SIZE]
 
HEy Jlames, just missed you at the videomaker expo and HD expo in LA. Missed you by about 2 minutes. Sorry. I did get to meet Rush and everybody at the Hilton hotel Expo. I also went to there store in Glendale and they were great at answering questions and setting up the JVC for me to check out. I am in love with the Vinton 3 tripod.
Anyways, I talked to someone at the JVC booth about the camera and he said that a firmware update is coming very soon along with the focus drive which is now being tested in Japan. He mentiond a lot of fixes on the camera with the new firmware and also stated that NO camera in america has the firmware installed in them. So I plan on purchasing the camera when the new updated ones are in . Thats is probally why they extended the camera battery special in order to move old stock out?
It doesn't make since to buy now only to have to ship it back to get the new firmware does it?
We'll, I like to thank the guys at EVS for putting up with me and answering my questions. EVS will get my business.
 
Hey, we only deal with the best and what's great about them; whether it's a one camera purchase or a dozen like us, they treat everyone with respect extending themselves above and beyond. I'm glad to hear you're going that way. Soory we missed eachother but we're all getting together at NAB. Hope you can make it.
J
 
Yea I'll be at NAB. Were staying at the rio hotel. Can't believe the prices keep going up every year.
 
Has anyone edited HDV footage using 30p uncompressed capture from the component out of JVC's HDV deck?

Drew Harty
 
Last edited:
joe13 said:
Yea I'll be at NAB. Were staying at the rio hotel. Can't believe the prices keep going up every year.
Click to expand...
We'll have the motorcoach at Circus Circus and we'll be putting together a shindig. You're of course inmvited.
J
 
Is their a cost to getting the filmware updates? Seems to me that to buy the camera now would be a better choice as you can get the battery deal now, then send the camera in for updates later and avoid the increase in price and buying a good battery set up later. Any thoughts on this?
 
vision quest said:
Is their a cost to getting the filmware updates? Seems to me that to buy the camera now would be a better choice as you can get the battery deal now, then send the camera in for updates later and avoid the increase in price and buying a good battery set up later. Any thoughts on this?
Click to expand...
This is a good strategy. There is not two ways about it, you'll need a battery solution and getting it free while you can is the smartest financial move. Otherwise you're looking at spending an additional $800 (approx) for a battery solution.

good luck...
 
Do you know what JVC usually charges to do a filmware update and would I have to send the camera to them or can it be done at an authorized dealer?
 
I'm under the impression you need to send it to their main CA location which has the needed calibration equipment.

I'm waiting until I hear they have the latest firmware upgrade available, them I'm sending mine out.
 
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