Audio problem with downconvert on HDSDI at DVinfo.net

Go Back   DV Info Net > JVC ProHD & MPEG2 Camera Systems > JVC GY-HM 600/700/800 Series Camera Systems

JVC GY-HM 600/700/800 Series Camera Systems
GY-HM6xx, HM7xx and HM8xx ProHD camcorders & decks.


Reply
 
Thread Tools Search this Thread
Old February 4th, 2010, 09:55 PM   #1
Contributor
 
Join Date: Jul 2005
Location: Sydney Australia
Posts: 868
Audio problem with downconvert on HDSDI

Hi - I have no problem with the HD-SDI embedded audio when recording hi-def on the HM700 via HD-SDI but real issues with the downconvert to SD.

On Avid via my NitrisDX box the audio is distorted and on the Convergent Design Nanoflash it is unusable (sounds like a sample rate problem) and won't import into Avid at all (sample rate error). The audio recorded in camera is fine.

Can anyone else confirm this issue on their cam?
John Mitchell is offline   Reply With Quote
Old February 5th, 2010, 01:21 PM   #2
Regular Crew
 
Join Date: Oct 2006
Location: Silkeborg Denmark
Posts: 93
I have a problem with 1 of several computers, where it makes a hissing sound on and off, rendering the sound unusable.

This only happens on one of the computers with Premiere Pro - if I use for example Edius, there's no problem. And if I use another computer with Premiere Pro - then there is no problem either.

The computer in question runs 64-bit Windows 7, so that may have something to do with the problem, but untill now I have failed to clearly locate the problem. I even shifted the soundcard on this computer - but problem still exists. So I'm leaning against a OS problem of some sort.

/peter
Peter Erfurt is offline   Reply With Quote
Old February 5th, 2010, 06:58 PM   #3
Contributor
 
Join Date: Jul 2005
Location: Sydney Australia
Posts: 868
Sorry Peter - I think I missed the connection there? Are we talking about the same thing - downconverted Standard definition material from the SDI port of the JVC GY-HM700?
John Mitchell is offline   Reply With Quote
Old February 5th, 2010, 07:39 PM   #4
Regular Crew
 
Join Date: Oct 2006
Location: Silkeborg Denmark
Posts: 93
Sorry, NO - but then again in a sense yes = sound problems with the output from 700 (!)

But I agree - your problem is not at all the same as mine, but what I'm saying is, that there COULD be issues with the way the 700 presents sound to a computer, hence we have different problems in the NLE systems ??

/peter
Peter Erfurt is offline   Reply With Quote
Old February 7th, 2010, 10:33 PM   #5
Contributor
 
Join Date: Jul 2005
Location: Sydney Australia
Posts: 868
Peter I'd say our problems are not at all related. I have had no issue with the sound of the SD cards that record in camera. My problem is entirely related to the HD-SDI port and ONLY on downconvert.

Your problem sounds like a Premiere Pro compatibility issue with the soundcard in that particular machie. It may not be hardware related but could be a software issue such as direct x - keep in mind different software applications call up different decoders to deal with audio and video.


HTH

John
John Mitchell 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 > JVC ProHD & MPEG2 Camera Systems > JVC GY-HM 600/700/800 Series Camera Systems

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 08:45 AM.


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