HDV export to tape lossless? at DVinfo.net
DV Info Net

Go Back   DV Info Net > Cross-Platform Post Production Solutions > Adobe Creative Suite

Adobe Creative Suite
All about the world of Adobe Premiere and its associated plug-ins.

Reply
 
Thread Tools Search this Thread
Old March 27th, 2007, 06:36 PM   #1
Regular Crew
 
Join Date: Feb 2007
Location: calgary, Canada
Posts: 48
HDV export to tape lossless?

If importing HDV then exporting back to tape, is the footage as high quality as the original footage after it's gone through both the import and the export transcoding to make it HDV? Or is the only way to keep it lossless quality to import and export using HDMI?

Thanks!
Michael
Michael Barrette is offline   Reply With Quote
Old March 27th, 2007, 07:21 PM   #2
Trustee
 
Join Date: May 2002
Location: Clermont, FL
Posts: 1,520
There will be loss, but less loss if you use Cineform Aspect HD. In any case, there is loss when encoding it back to HDV.
__________________
Steven Gotz
http://www.stevengotz.com
Steven Gotz is offline   Reply With Quote
Old March 27th, 2007, 09:23 PM   #3
Major Player
 
Join Date: Oct 2003
Location: Portland OR
Posts: 227
Loss at scene boundaries

As you can see from this post, the export back to tape is tripped up by scene boundaries.

http://www.dvinfo.net/conf/showthread.php?t=89585

The original footage always starts with a full "I frame", thats one reason why our HDV cameras take a few heartbeats to start recording. On reexport, scene boundaries will often badly miss "I frame boundaries". At least thats my interpretation. In Blu-Ray authoring, using VBR lets software ramp up speed for such.
Don Blish is offline   Reply With Quote
Old March 27th, 2007, 09:24 PM   #4
Wrangler
 
Join Date: May 2003
Location: Eagle River, AK
Posts: 4,100
Steve is definitely correct if you've edited and then rendered out for export to tape.

I was under the impression that if you just captured and then exported back to tape without doing anything more than cuts -- (no color correction, etc that would require a render), you shouldn't lose image quality. There's probably a caveat for HDV, though, in that if you've cut in the middle of a GOP, it presumably would force a render of at least some adjacent frames to create new GOP's, but this is about as far as I can go with it. Steve and others can probably write more authoritatively on that.

EDIT: That was fast...see Don's post just before mine!
__________________
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!
Pete Bauer is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

B&H Photo Video
(866) 521-7381
New York, NY USA

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK


DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Cross-Platform Post Production Solutions > Adobe Creative Suite

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



All times are GMT -6. The time now is 11:34 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network