Digital Recorder and Video Sync - Page 2 at

Go Back   DV Info Net > The Tools of DV and HD Production > All Things Audio

All Things Audio
Everything Audio, from acquisition to postproduction.

Thread Tools Search this Thread
Old May 15th, 2008, 08:59 AM   #16
Regular Crew
Join Date: Apr 2007
Location: Olney, Maryland
Posts: 197
Originally Posted by Steve House View Post
...In one clip, with KT Tunstall singing "Suddenly I See" while sitting on a tree branch, she's definitely out of sync by several frames - totally unoticable on a regular TV but glaringly obvious on the big screen projection set.
I see out of sync stuff on TV all the time. There really is no excuse for it. As an editor, I can expand the timeline and determine exactly how far the waveforms are off in relation to the reference audio. I'm not looking at the monitor...I'm looking at the magnified waveforms.

Interesting enough, some camera's are actually slightly out of A/V sync.
Jim Boda is offline   Reply With Quote
Old May 16th, 2008, 09:00 AM   #17
Regular Crew
Join Date: Apr 2006
Location: Brooklyn, NY
Posts: 111
For what it's worth - I used the Sony D50 recently as a "room" recorder at a music event where primary audio was going to a Fostex PD606. The 606 has an internal TC generator; the D50 does not. They stayed in sync with each other over a take of about 45 minutes.

Now in a few days I get to find out whether they stayed in sync with the non-TC cameras we shot on . . heheh, fun.
Abe Dolinger is offline   Reply With Quote
Old May 16th, 2008, 10:01 AM   #18
Join Date: May 2007
Location: Minneapolis, MN
Posts: 1,273
In a two hour show, my iRivers drift maybe 5-10 frames at the end. Fixable, but annoying. One thing I saw however, was an option to sync audio to 29.97 NTSC in Apple's Soundtrack Pro 2. I'd sure like to try this, but soundtrack never wants to play with me; it's easily the buggiest program in FCS2 and crashes repeatedly. Has anyone used this feature before, and would it solve some of the problems being described here?
Nate Haustein is offline   Reply With Quote
Old May 17th, 2008, 02:56 PM   #19
New Boot
Join Date: Nov 2007
Location: Gothenburg Sweden
Posts: 14
I use a Zoom H2 all the time for my videos and it is about 0.3 sec too fast over the hour. I use Avisynth for most editing and it's very simple to correct the drift with these two lines in the script:


All I have to do is trim the H2 WAV files to match the camera audio startpoint and then run this script:

Tweak(sat=0.8, Hue=0)

Here all four mic capsules are used to get a nice 6 channel WAV that later can be fed into an AC3 encoder to get surround sound. Just note that If the video is really long you may get past the 2 GB WAV file limit.

Also there is no need to worry about pitch after the resampling. At 440 Hz you will get one beat every 30 sec. if you (for whatever reason) mix the original with the resampled WAV. That's not audable at all and much less than any piano tuner can achieve.

Once you learn to stay away from the digital recording level and just keep the H2 at medium senitivity it's a great recorder. Even works handheld if you can keep your fingers absolutely still.
Kenneth Medin is offline   Reply With Quote
Old May 19th, 2008, 08:12 AM   #20
Regular Crew
Join Date: Aug 2007
Location: Canada
Posts: 26
I was giving serious thought to getting the H4 truthfully. it's the only pocket sized recorder with XLR in's which is what i want. where is this link that talks about the zoom's anyway?
Luca Furgiuele is offline   Reply

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

(800) 223-2500
New York, NY

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

Texas Media Systems
(512) 440-1400
Austin, TX

Precision Camera
(800) 677-1023
Austin, TX

(800) 323-2325
Mineola, NY

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 > The Tools of DV and HD Production > All Things Audio

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -6. The time now is 11:44 PM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2018 The Digital Video Information Network