uncompressed from XHA-1?

Geoff Dills · April 30th, 2007, 09:39 AM

Downconverting in the camera is going to give you the poorest quality from HDV. Best method, tho takes a lot of rendering time, is to cut in HDV, then export to MPEG. The difference in the image quality is significant.

Mark Fry · April 30th, 2007, 09:46 AM

Quote:

Originally Posted by Geoff Dills

Downconverting in the camera is going to give you the poorest quality from HDV. Best method, tho takes a lot of rendering time, is to cut in HDV, then export to MPEG. The difference in the image quality is significant.

Yes - when I've upgraded my computer, this is what I expect I'll do. The final render to SD DVD format will probably be no slower than my current machine which takes about 4 hours for a 90 minute avi file using Canopus ProCoder Express. I leave it running over night!

Will Griffith · April 30th, 2007, 11:07 AM

Analog component works great with a Blackmagic HD card.
it is easier to key than HDV and yields more resolution.

But is obviously NOT portable. :(

Maksim Yankovskiy · April 30th, 2007, 12:38 PM

What does "not portable" means in this context?

Quote:

Originally Posted by Will Griffith

But is obviously NOT portable. :(

Will Griffith · April 30th, 2007, 12:40 PM

Your would need to be connected to a MacPro or similar w/fast HD array.

-will

Mike Gorski · April 30th, 2007, 02:03 PM

Well portability has been solved with the AJA IO-HD Apple ProRes 422 converter. Using a Mac platform such as the a fully furnished Macbook Pro you can take uncompressed HD with the 4:2:2 colorspace at full 1920X1080 resolution and have this awesome machine convert it via ProRes 422 realtime. You'll transfer data that can be handled by Firewire to connect to your laptop and be completely free from the tower. The data rate is almost that of SD video and can be a feasible solution in the future. I know this is something thats making a huge impact on my first HD purchase. What I want to know is if the analog output of the A1 is full uncompressed HD and is beneficial like the Sony HVR-V1's HDMI output. If so, how good is the conversion of the analog signal to a digital signal? Can't wait to hear some results.

Will Griffith · April 30th, 2007, 02:11 PM

It will be better than recording to tape, but it will not be as pristine as
the V1U HDMI nor the G1 HDSDI, or H1...etc. etc.

It is analog, so there will be an amount of noise that is not present in
a digital signal. However.... it is still much more info than HDV, which
is good.

The new IO will help greatly, but it still is not a portable solution, like say
a 4:2:2 Firestore type device which is completely cable, AC, etc. free.
(Which I hope is introduced by someone sometime soon).

So in conclusion... HDV looks mighty fine from the A1 and the component
output looks even better IMO.

Jonathan Gentry · April 30th, 2007, 09:03 PM

Would anyone with a G1 please post a grab from the SDI Out vs HDV to tape so we can compare color etc. Has anyone seen this done on any other site? A picture tells a thousand words.

Would also be neat to see this comparison with some movement in the shot to see if there is difference in artifacts. I've been very impressed with Canon's HDV quality and seen very little artifacts/blocks in the shots. In real world use the Canon footage in HDV is pretty incredible.

-Jonathan

Mike Gorski · April 30th, 2007, 09:48 PM

Quote:

Originally Posted by Will Griffith

It will be better than recording to tape, but it will not be as pristine as
the V1U HDMI nor the G1 HDSDI, or H1...etc. etc.

It is analog, so there will be an amount of noise that is not present in
a digital signal. However.... it is still much more info than HDV, which
is good.

The new IO will help greatly, but it still is not a portable solution, like say
a 4:2:2 Firestore type device which is completely cable, AC, etc. free.
(Which I hope is introduced by someone sometime soon).

So in conclusion... HDV looks mighty fine from the A1 and the component
output looks even better IMO.

Good catch, I thought I read somewhere that it was fully portable but it isn't. It needs AC electricity to run so maybe in the future we can see maybe a simplified version for portability? I know I'm thinking really far a head of the game but the IO-HD is a start.

Barlow Elton · May 1st, 2007, 01:08 PM

Quote:

Originally Posted by Will Griffith

It will be better than recording to tape, but it will not be as pristine as
the V1U HDMI nor the G1 HDSDI, or H1...etc. etc.

SDI and analog are virtually the same as far as I can tell. The Kona card has very good converters, and the Canon's DAC ain't half bad, so the net result is basically an indistinguishable difference.

Will Griffith · May 1st, 2007, 01:14 PM

Comparing H1 HDSDI to A1 analog here on a Decklink HD
shows more noise on the A1, the AJA card may look a lot
better.

Regardless....both look great. If anyone wants to see some
frames from greenscreen H1 HDSDI capture we just did today to
DVCPROHD email me griffithwb msha com

the A1 would look very similar

April 30th, 2007, 11:07 AM	#18
Will Griffith Regular Crew Join Date: Apr 2003 Location: Tennessee Posts: 164	Analog component works great with a Blackmagic HD card. it is easier to key than HDV and yields more resolution. But is obviously NOT portable. :( __________________ will griffith producer/editor

April 30th, 2007, 12:40 PM	#20
Will Griffith Regular Crew Join Date: Apr 2003 Location: Tennessee Posts: 164	Your would need to be connected to a MacPro or similar w/fast HD array. -will __________________ will griffith producer/editor

April 30th, 2007, 02:11 PM	#22
Will Griffith Regular Crew Join Date: Apr 2003 Location: Tennessee Posts: 164	It will be better than recording to tape, but it will not be as pristine as the V1U HDMI nor the G1 HDSDI, or H1...etc. etc. It is analog, so there will be an amount of noise that is not present in a digital signal. However.... it is still much more info than HDV, which is good. The new IO will help greatly, but it still is not a portable solution, like say a 4:2:2 Firestore type device which is completely cable, AC, etc. free. (Which I hope is introduced by someone sometime soon). So in conclusion... HDV looks mighty fine from the A1 and the component output looks even better IMO. __________________ will griffith producer/editor

May 1st, 2007, 01:14 PM	#26
Will Griffith Regular Crew Join Date: Apr 2003 Location: Tennessee Posts: 164	Comparing H1 HDSDI to A1 analog here on a Decklink HD shows more noise on the A1, the AJA card may look a lot better. Regardless....both look great. If anyone wants to see some frames from greenscreen H1 HDSDI capture we just did today to DVCPROHD email me griffithwb msha com the A1 would look very similar __________________ will griffith producer/editor

April 30th, 2007, 09:39 AM	#16
Geoff Dills Regular Crew Join Date: Oct 2005 Location: Washington, DC Posts: 85	Downconverting in the camera is going to give you the poorest quality from HDV. Best method, tho takes a lot of rendering time, is to cut in HDV, then export to MPEG. The difference in the image quality is significant.

April 30th, 2007, 02:03 PM	#21
Mike Gorski Regular Crew Join Date: Mar 2007 Location: Hermosa Beach, CA Posts: 163	Well portability has been solved with the AJA IO-HD Apple ProRes 422 converter. Using a Mac platform such as the a fully furnished Macbook Pro you can take uncompressed HD with the 4:2:2 colorspace at full 1920X1080 resolution and have this awesome machine convert it via ProRes 422 realtime. You'll transfer data that can be handled by Firewire to connect to your laptop and be completely free from the tower. The data rate is almost that of SD video and can be a feasible solution in the future. I know this is something thats making a huge impact on my first HD purchase. What I want to know is if the analog output of the A1 is full uncompressed HD and is beneficial like the Sony HVR-V1's HDMI output. If so, how good is the conversion of the analog signal to a digital signal? Can't wait to hear some results.

April 30th, 2007, 09:03 PM	#23
Jonathan Gentry Regular Crew Join Date: Jun 2004 Posts: 183	Would anyone with a G1 please post a grab from the SDI Out vs HDV to tape so we can compare color etc. Has anyone seen this done on any other site? A picture tells a thousand words. Would also be neat to see this comparison with some movement in the shot to see if there is difference in artifacts. I've been very impressed with Canon's HDV quality and seen very little artifacts/blocks in the shots. In real world use the Canon footage in HDV is pretty incredible. -Jonathan