SDI out... at DVinfo.net

Bill Pryor · October 17th, 2005, 03:14 PM

If you recorded something in HDV onto the camera's tape and then wanted to play it back through the SDI output so you could load it into an HD Adreniline, what would happen--ie., can you play back the HDV tape and get something out of the SDI?

Chris Hurd · October 18th, 2005, 05:50 AM

Hi Bill,

If I'm reading it right, your question is will the H1 playback HDV through SDI when in VCR mode. Too many acronyms. I believe it will, don't see why not, but I'll try to confirm this in a couple of days at PhotoPlus Expo in NYC.

Pete Bauer · October 18th, 2005, 08:38 AM

Of course, since HDV is lossy, even if recorded HDV can be put out the SDI port, you're going to get HDV quality rather than the full quality of HD-SDI passed directly from the camera head. I suppose there might be practical reasons to put the HDV out by SDI rather than Firewire, but quality-wise I'd guess there's probably no advantage?

Bill Pryor · October 18th, 2005, 10:55 AM

The reason would be an NLE that has only SDI in.

Peter Ferling · October 18th, 2005, 02:06 PM

Correct. Then you'd get an uncompressed, very large HDV quality file, with the benefit of having every little nuance, colorshift, and blocky edges perfectly preserved.

If you have not already captured this media, then I'd rent a camera that had higher quality for the shoot.

Pete

Thomas Smet · October 22nd, 2005, 02:01 AM

The one good thing about capturing this way is that, without talking about hard drive space here, uncompressed HD is much easier to edit on current edit systems compared to mpeg2 compressed HDV. Also for heavy effects work with multiple passes of rendering uncompressed would be better than native HDV not to mention render much faster.

There are even products coming out now to do exactly this. Convert firewire HDV into HD SDI. If you can get by the massive hard drive space issues uncompressed HD is much easier to edit.

Kevin Dooley · October 22nd, 2005, 08:04 AM

Not to mention you don't have to capture it uncompressed, you could simply capture it in something that is easier to edit... DVCPRO HD, HDCAM, one of the Lumiere or Cineform lossless intermediaries... It opens up a lot of choices for you, without having to capture the native HDV and then wait while it rerenders into another format...

Peter Ferling · October 24th, 2005, 09:27 AM

Listen, shoot in a 4:2:2 format if you want the real benefit of uncompressed. How are you going to archive that material? Back out to HDV? Yuck.

If you have a mac, then it's a native edit with hdv, For the PC, get cineform and capture to an already easy to edit format on the fly that is still smaller than uncompressed.

Peter Ferling · October 24th, 2005, 09:36 AM

... of course, you could consider working with proxy files.

John Mitchell · October 25th, 2005, 07:01 AM

Quote:

Originally Posted by Bill Pryor

The reason would be an NLE that has only SDI in.

Adrenaline has IEEE in but with HDV you need to use an external card ... I guess if you have an HD board then Adrenaline should be able to cross-convert on the fly from the IEEE port to DnxHD. Do you know if this is the case Thomas? I don't have the HD board option.

October 17th, 2005, 03:14 PM	#1
Bill Pryor Contributor Join Date: Jan 2003 Location: Kansas City, MO Posts: 4,449	SDI out... If you recorded something in HDV onto the camera's tape and then wanted to play it back through the SDI output so you could load it into an HD Adreniline, what would happen--ie., can you play back the HDV tape and get something out of the SDI?

October 18th, 2005, 05:50 AM	#2
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	Hi Bill, If I'm reading it right, your question is will the H1 playback HDV through SDI when in VCR mode. Too many acronyms. I believe it will, don't see why not, but I'll try to confirm this in a couple of days at PhotoPlus Expo in NYC. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

October 18th, 2005, 08:38 AM	#3
Pete Bauer Wrangler Join Date: May 2003 Location: Eagle River, AK Posts: 4,100	Of course, since HDV is lossy, even if recorded HDV can be put out the SDI port, you're going to get HDV quality rather than the full quality of HD-SDI passed directly from the camera head. I suppose there might be practical reasons to put the HDV out by SDI rather than Firewire, but quality-wise I'd guess there's probably no advantage? __________________ Pete Bauer The most beautiful thing we can experience is the mysterious. It is the source of all true art and science. Albert Einstein Trying to solve a DV mystery? You may find the answer behind the SEARCH function ... or be able to join a discussion already in progress!

October 22nd, 2005, 08:04 AM	#7
Kevin Dooley Major Player Join Date: Dec 2003 Location: Fort Worth, TX Posts: 414	Not to mention you don't have to capture it uncompressed, you could simply capture it in something that is easier to edit... DVCPRO HD, HDCAM, one of the Lumiere or Cineform lossless intermediaries... It opens up a lot of choices for you, without having to capture the native HDV and then wait while it rerenders into another format... __________________ Kevin Dooley Media Director, Pantego Bible Church

October 18th, 2005, 10:55 AM	#4
Bill Pryor Contributor Join Date: Jan 2003 Location: Kansas City, MO Posts: 4,449	The reason would be an NLE that has only SDI in.

October 18th, 2005, 02:06 PM	#5
Peter Ferling Trustee Join Date: May 2005 Location: Wyomissing, PA Posts: 1,141 Images: 57	Correct. Then you'd get an uncompressed, very large HDV quality file, with the benefit of having every little nuance, colorshift, and blocky edges perfectly preserved. If you have not already captured this media, then I'd rent a camera that had higher quality for the shoot. Pete

October 22nd, 2005, 02:01 AM	#6
Thomas Smet Trustee Join Date: Mar 2004 Location: Milwaukee, WI Posts: 1,719	The one good thing about capturing this way is that, without talking about hard drive space here, uncompressed HD is much easier to edit on current edit systems compared to mpeg2 compressed HDV. Also for heavy effects work with multiple passes of rendering uncompressed would be better than native HDV not to mention render much faster. There are even products coming out now to do exactly this. Convert firewire HDV into HD SDI. If you can get by the massive hard drive space issues uncompressed HD is much easier to edit.

October 24th, 2005, 09:27 AM	#8
Peter Ferling Trustee Join Date: May 2005 Location: Wyomissing, PA Posts: 1,141 Images: 57	Listen, shoot in a 4:2:2 format if you want the real benefit of uncompressed. How are you going to archive that material? Back out to HDV? Yuck. If you have a mac, then it's a native edit with hdv, For the PC, get cineform and capture to an already easy to edit format on the fly that is still smaller than uncompressed.

October 24th, 2005, 09:36 AM	#9
Peter Ferling Trustee Join Date: May 2005 Location: Wyomissing, PA Posts: 1,141 Images: 57	... of course, you could consider working with proxy files.