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-   -   Is Firewire enough for capturing HD media? (https://www.dvinfo.net/forum/jvc-gy-hd-series-camera-systems/90073-firewire-enough-capturing-hd-media.html)

Erhan Gucel March 27th, 2007 04:35 PM

Is Firewire enough for capturing HD media?
 
A friend of mine said "Firewire doesn't have enough bandwidth to capture from a camera". Is it true? Because I shot my short film in 720p25 format with HD111 and I'm planning to capture 2 hour of footage via Firewire using Adobe Premiere 2.0 with Cineform Aspect HD.

Is it enough?

Chris Barcellos March 27th, 2007 04:47 PM

Yes. HDV is about the same bandwidth as DV. It will capture fine from your HDV tape source. The real issue is whether your system can handle HDV editing after capture.

David Parks March 27th, 2007 04:49 PM

Erhan,

You should not have any problems. HDV 1 (720p) is a compressed HD 1280/720p data stream running at 19 megabits per second. Firewire can handle up to 400 megabits per second. Plenty fast. So, your friend is misinformed.

Good Luck.

Dana Salsbury March 27th, 2007 04:59 PM

The only problem I've ever had is in rendering a 15 minute ceremony. It would freeze up at 5%. I then found an article that suggested rendering to an internal drive instead of through a firewire to an external. I tried it an it worked. The thing is, though, I had never had that problem before. Perhaps it was a fluke.

Erhan Gucel March 27th, 2007 05:07 PM

Thanks for the reply all of you.

I'm planning to do this: will buy a 320 GB Sata Hard disc, and will buy a HDD case to connect HDD to my comp. via USB or firewire and capture the media to it in a 1:1 ratio. (I mean no compression). I have 2 full tapes (120 min of footage)
So how many Gigs needed? And this way of capturing is ok?

My System's spec:
AMD64 3200+ (overclocked to 4000)
1 GB DDR ram
nvidia 7950GT 512 MB
120 MB IDE HDD (and 320 GB SATA)
Win XP Pro.

Is it enough?

Jack Walker March 28th, 2007 12:07 AM

Here's an old thread with a posts by Tim Dashwood, Werner Wesp and others that answer your questions about size:

http://dvinfo.net/conf/showthread.php?t=77329

Chris Barcellos March 28th, 2007 12:57 AM

Once the video is on the tape, the compression is there. No changing that.

So you need somewhere in the area of 13 gigs per hour of tape to capture to .m2t files. If you use an intermediate like cineforms, figure about 30 gigs.

Dana Salsbury March 28th, 2007 05:21 AM

If you're going external, I use a 320G Western Digital external via firewire. (Don't mess with USB.) I swear by WD, as I have dropped it onto a hardwood floor and it has never failed. If you're going to go bigger in the future, Best Buy has a new-fangled external RAID hard drive system that looks promising, and is expandible up to 2TB. I don't recall the manufacturer.

You might check into an internal raid system if you have space in your comp.

Drew Curran March 28th, 2007 06:27 AM

Quote:

Originally Posted by Erhan Gucel (Post 649676)
A friend of mine said "Firewire doesn't have enough bandwidth to capture from a camera". Is it true? Because I shot my short film in 720p25 format with HD111 and I'm planning to capture 2 hour of footage via Firewire using Adobe Premiere 2.0 with Cineform Aspect HD.

Is it enough?

Uncompressed HD would be impossible to capture via firewire - perhaps this is what your friend meant?

Drew

Keith Winstein March 29th, 2007 08:25 PM

Quote:

Originally Posted by Drew Curran (Post 650007)
Uncompressed HD would be impossible to capture via firewire

Certainly, the HD100 doesn't support sending uncompressed HD over Firewire, but it would be possible. 1280x720/30P 4:2:0 video is only 332 megabits/sec, and 1280x720/30P 4:2:2 video is only 442 megabits/sec. A device could send those signals over Firewire 400 and Firewire 800, respectively. Obviously, though, the best thing you get from the HD100's Firewire 400 is a 19 megabit/sec MPEG-2 compressed 1280x720/30P 4:2:0 signal.

Drew Curran March 30th, 2007 02:22 AM

Quote:

Originally Posted by Keith Winstein (Post 651141)
Certainly, the HD100 doesn't support sending uncompressed HD over Firewire, but it would be possible. 1280x720/30P 4:2:0 video is only 332 megabits/sec, and 1280x720/30P 4:2:2 video is only 442 megabits/sec. A device could send those signals over Firewire 400 and Firewire 800, respectively. Obviously, though, the best thing you get from the HD100's Firewire 400 is a 19 megabit/sec MPEG-2 compressed 1280x720/30P 4:2:0 signal.

The figures might look good, but in reality I'd doubt it would work. All the big studios would be trippin gover themselves to use basic firewire drives...


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