Preliminary XDR Jam-Sync Tests Results with Latest Beta Firmware at DVinfo.net
DV Info Net

Go Back   DV Info Net > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Convergent Design Odyssey
...and other Convergent Design products.

Reply
 
Thread Tools Search this Thread
Old February 23rd, 2010, 10:59 AM   #1
Trustee
 
Join Date: Sep 2006
Location: Montreal, Quebec, Canada
Posts: 1,138
Preliminary XDR Jam-Sync Tests Results with Latest Beta Firmware

Hi Dan, Mike, Tommy and Fellow XDR Users:

Here are the preliminary Jam-Sync 24 F test results for the latest beta firmware release (Version 1.5.25) on the Flash XDR:

1. 24 F Jam-Sync Test Results{ Both Camera & XDR running on fully charged battery power to duplicate normal shooting conditions}

A) Camera Used [ Canon XLH1 @ 24 F 23.98 fps over 59.94 Hz ]
B) Time Duration Measured: 2 Hrs

Time begins to drift after exactly 11 minutes at 1 second intervals every 10 minutes up to a maximum measured time drift of 5 seconds. This is much less of a general time drift. I don't know how you folks can close this gap, but you are slowly getting closer and closer with each firmware update.
* The time drift direction is the XDR slows down by an eventual 5 seconds max to measure so far. I have run this 2 hour time interval test twice now. I will now run a 3 hour Jam-Sync test to more closely approximate the shooting of a live concert event, where such use of Jam-Sync would be most commonly justified.
** I have not yet tested regular 59.94 i Jam-Sync this time around yet, but will do so. So far, I have not found there to be any perceivable time drift between clocks at the faster fps video rate on earlier firmware releases.
Mark Job is offline   Reply With Quote
Old February 24th, 2010, 10:42 AM   #2
Trustee
 
Join Date: Sep 2006
Location: Montreal, Quebec, Canada
Posts: 1,138
Results of 3 Hour 24 F Jam-Sync Test

Hi Dan, Mike, Tommy and Fellow XDR Users:

The results of the 3 hour test were progressive in drift as well, with an increase at the end of the 3rd hour to a grand total time discrepancy of 14 seconds slower than the camera clock.

*59.94 Hz Jam0-Sync Results coming up soon.

Respectfully,
Mark Job is offline   Reply With Quote
Old February 24th, 2010, 02:48 PM   #3
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,421
Dear Mark,

Thank you for your detailed tests.

Was the XL H1 powered up, and connected to the Flash XDR via HD-SDI the entire time?
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old February 24th, 2010, 05:26 PM   #4
Trustee
 
Join Date: Sep 2006
Location: Montreal, Quebec, Canada
Posts: 1,138
Hi Dan:
Yes indeed. I had the HD-SDI cable connected the entire time.

Respectfully,
Mark Job is offline   Reply With Quote
Old February 25th, 2010, 01:38 AM   #5
Contributor
 
Join Date: Jul 2005
Location: Sydney Australia
Posts: 873
Hi Mark -

It would be interesting to run the same test but record out via firewire to a PC at the same time and compare the actual recorded video and audio.

I've noticed that my audio lags two frames behind my internally recorded audio with the HM700 but I haven't done any long form stuff like concerts with it.


cheers John
John Mitchell is offline   Reply With Quote
Old February 25th, 2010, 01:04 PM   #6
Trustee
 
Join Date: Sep 2006
Location: Montreal, Quebec, Canada
Posts: 1,138
Firewire Output ?

Hi John:
I'm not sure I follow you regarding the firewire output in the Jam-Sync Test ? Could you elaborate?

Sincerely,

Mark
Mark Job is offline   Reply With Quote
Old March 5th, 2010, 08:56 AM   #7
Contributor
 
Join Date: Jul 2005
Location: Sydney Australia
Posts: 873
Mark - sorry for the late reply. I assumed for your jam sync test you were running video via HD-SDI and simply observing the TC on both the XDR and the camera.

I was merely interested to see if you recorded footage at the same time - so recording on the XDR and a laptop/PC at the same time and observing the recorded TC on both streams when the actual video streams were matched in an NLE.

I'm just wondering if TC drifts does that mean your video would get out of sync as well?
John Mitchell is offline   Reply With Quote
Old March 16th, 2010, 08:19 AM   #8
Trustee
 
Join Date: Sep 2006
Location: Montreal, Quebec, Canada
Posts: 1,138
24 F Jam-Sync Repair with Next XDR Firmware Release

Hi Mike, Tommy, and Dan:
Will the next firmware release (Or Public Beta ?) for the XDR have a fix for the 24 F jam-Sync in it ? Please be advised that 1080i 59.94 Hz Jam-Sync works perfectly. Also, do you have a fix for .MPG playback in realtime in the XDR ?

Respectfully,
Mark Job is offline   Reply With Quote
Old March 16th, 2010, 09:35 AM   #9
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,421
Dear Mark,

I will check on both of your questions.
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old March 16th, 2010, 10:48 AM   #10
Regular Crew
 
Join Date: Nov 2007
Location: Colorado Springs, CO
Posts: 65
Hi Mark,

Timecode is a little slippery in pulldown removal mode, going from a 1080i60 timecode source to 1080p24.
We will have to examine jam sync behavior more closely in this mode, unfortunately we probably won't be able to address in the pending beta release.
MPG playback should be improved in this release. However we had to disable the "pause" feature in MPG, our codec doesn't like to pause with MPG's compressed audio.
Pause will still work in MXF and Quicktime.
File skipping will still work in MPG.

Tommy
Tommy Schell is offline   Reply With Quote
Old March 17th, 2010, 07:29 AM   #11
Trustee
 
Join Date: Sep 2006
Location: Montreal, Quebec, Canada
Posts: 1,138
Playback Pixelation & Smoothing Issue

Hi Dan & Tommy:
OK. Thank you for this info. Have you folks been able to resolve the strange playback breakup and blurring issue with .MOV or .MXF files for the latest beta ? The audio also popped and screeched at me. I think this one scares me the most. Please Advise.
Mark Job is offline   Reply With Quote
Old March 17th, 2010, 07:57 AM   #12
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,421
Dear Mark,

Yes, there were issues on playback, in the nanoFlash or Flash XDR of ".MOV" files in our first Public Beta, 1.5.31 (nanoFlash) and 1.15.25 (Flash XDR).

These have been fixed.

Yes, the audio problems have been fixed.

Stay tuned.
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old March 17th, 2010, 08:28 AM   #13
Trustee
 
Join Date: Sep 2006
Location: Montreal, Quebec, Canada
Posts: 1,138
Excellent News :-)

Hi Dan & Tommy:
This is excellent news ! Thank You :-)
Mark Job 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 > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



All times are GMT -6. The time now is 02:58 AM.


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