What's up with HDV export to tape? at DVinfo.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 July 10th, 2010, 11:08 PM   #1
Major Player
 
Join Date: Feb 2003
Posts: 339
What's up with HDV export to tape?

The reason why I mention it is that the contents of my master timeline almost entirely consists of .m2t files which have already been highly compressed by nature of their native format.

So, when the pop-up box HDV export to tape render & record appears and it says its' "transcoding", what is really going on here? Is it re-encoding, encoding, transcoding or otherewise adding further compression to the material being processed with any potential exposure to quality loss? I ask because the quality of the material on the master timeline is very high.

Secondly, it takes a very long time to "render"/"transcode" a 45 minute program.

The progress bar literally creeps n' crawls.

Does this means it's going to take hours to archive a HDV project to tape?

What sort of processing & completion timeframe should I be expecting here?

Exporting an SD project to tape comparatively speaking is a snap and apparently is not subject to transcoding.

Please enlighten!

Thank you.
Bruce Pelley is offline   Reply With Quote
Old July 11th, 2010, 12:03 AM   #2
Major Player
 
Join Date: Mar 2005
Location: Neenah, WI
Posts: 547
Ah yes...HDV.

It sounds like this is your first time editing then exporting in HDV...yes? I don't want to sound like I'm being sarcastic if you already know all this stuff...not my intent.

So...these GOPs. these groups of pictures. The basic idea is that the odds that an 'in' point on a given clip will fall on an 'I' frame (the first frame of the GOP, and the only frame that's complete) are slim. When that doesn't happen, that in point frame needs to become a new I frame of sorts so that all the information can be there...there's some transcoding there.

Also...when you line the whole timeline up and start numbering ITS GOPs in sequence (which has to be done to go back to HDV)...there are a lot of frames that end up in a different position in the new timeline than they had in the clip they originated from...like almost all of them. I frames may be P frames and P frames might now be B frames and B frames may become I frames. If a B frame...the lowliest fractional frame in the GOP, becomes an I frame from just happening to be positioned on the correct spot, there is some work to be done.

...and of course MPEG GOPs encode and decode out of order, so it has to buffer an entire GOP to do the job.

SD tape is typically all I frame formats...so they just play out. HDV needs to be a file when it goes out as it's almost more akin to a file transfer than a "videotape recording" even though there it is... It's a videotape.

So anyway...it can take some time.
__________________
TimK
Kolb Productions
Tim Kolb is offline   Reply With Quote
Old July 11th, 2010, 11:05 PM   #3
Major Player
 
Join Date: Feb 2003
Posts: 339
For the record

CS PP3.2 cannot handle HDV export to tape.

3 times in a row it transcoded, then recorded about 24-25 minutes to tape and then stopped!

It was at random too as there was absolutely nothing special going on on the timeline. In that timeframe there was just a person speaking with only 1 videotrack and no fancy stuff.

Then at the spot it quit, it would not pick off where it stopped.
NO, but it went back to the beggining and started all over again which I already had.

I switched tapes, batteries, exported from diff versions of the same project, let the unit cool down as it was hot....nothing.

Can any of you think of anything to move forward so I can get the whole 45 minutes archived to tape?

Thanks
Bruce Pelley is offline   Reply With Quote
Old July 12th, 2010, 03:39 AM   #4
Major Player
 
Join Date: May 2003
Location: York, England
Posts: 502
Make sure that your work area extends over the entire timeline.

Premiere has problems with some Sony devices when exporting to tape - the HDV Walkman GV-HD700 is one of these. What you describe matches my experiences with the HD700.
Alan Craven is offline   Reply With Quote
Old January 13th, 2011, 09:55 PM   #5
Regular Crew
 
Join Date: Jan 2008
Location: Melbourne, Australia
Posts: 67
Alan, I'm having some difficulties with HD700 also, not the same as you mentioned but exporting to hdv freezes regularly (in 4min 02sec regular intervals) from cs3.

Have you had this issue and any ideas on how to fix?
Matthew Cairns is offline   Reply With Quote
Old January 13th, 2011, 11:33 PM   #6
Major Player
 
Join Date: Feb 2010
Location: sydney
Posts: 304
Exporting to tape has been a problem throughout all the Elements releases (I gave up at PE7) and it looks like it's a problem in Pro.
Chris Duczynski is offline   Reply With Quote
Old January 13th, 2011, 11:51 PM   #7
Regular Crew
 
Join Date: Jan 2008
Location: Melbourne, Australia
Posts: 67
Seems silly but to save the project and get my timeline on HDV tape I'm now creating an m2t file in Premiere, importing into Vegas and trying to print to tape - requiring another render of the file.

My fingers are crossed Vegas stands up and the HD700 is stable.
Matthew Cairns 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...

Professional Video
(800) 833-4801
Portland, OR

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

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

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

 



Google
 

All times are GMT -6. The time now is 05:46 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network