[Christopher Tay]

Some places I’ve been to have consumer monitors in the edit suite, in addition to the professional monitors as the editors wants to see how the images would look like on a consumer monitor. It’s not a real representative of what we end up seeing at home coz what we see at home are MPEG compressed images but some would argue that one should also see how the images look like, especially when grading is involved, on a consumer monitor to get a gauge.

What say you ?

-chrispy

PS : I see Bob on the way…

[Christopher Tay]

Hi Mike,

That is correct. The first frame is usually doubled when you run into this problem. For me, adjusting the Playback Offset to the correct value fixes the problem.

Give it shot…no harm trying.

-chrispy

[Christopher Tay]

Hi Mike,

Adjust the Playback Offset in the RS422 Device Control setting. The value is rather inconsistent but it’s usually between -1 to +1. You’ll need to play around until you get the correct value.

In my test I usually have an animated horizontal or vertical scroll so that when I check back the recording, I can easily tell if the first frame is repeated.

Also I’ve noticed that if the RS422 Device Control setting is incorrect, you will see repeated frames in the beginning of the recording as it will go back and forth.

Hope this helps.

-chrispy

[Christopher Tay]

Hi Stuart,

Someone asked me if it was possible so I wanted to find out if it can be done. I did some tests and the 8 cores CPU just hit the roof trying to transcode to XDCAM HD422 format during the injest…naturally it zonked out of juice and reported dropped frame.

But yes…the way to bring in the XDCAM materials is via data transfer.

By the way, I haven’t tested this yet…after finishing the edit, can you directly edit to tape or does FCP need to process the timeline before it can go to tape ? When I did a render, it has to do some form of conforming…so am wondering if this is the case for tape output.

-chrispy

[Christopher Tay]

Go to the AJA suppport website link below and download/install the AJA Macintosh QuickTime™ Codec v4.0 and see if you can now read the QT file on your MacBook.

https://www.aja.com/html/support_kona3_swd.html

-chrispy

[Christopher Tay]

Hi Greg,

Thanks….I did end up at your website after doing some goggling. Will download your demo and try it with my AJA card to see if it works.

-chrispy

[Christopher Tay]

Hi Ben,

The delay is on the video actually as it goes through the hardware conversion and this causes the audio to be ahead.

However I did some tests with the same clip that I saw the delay on another system and it wasn’t so apparent. I’m beginning to support it has to do with the OS,QT and FCP combo. Will do more testings.

-chrispy

[Christopher Tay]

Hi Bob,

May I know what OS,QT,FCP and Kona version are you running on those Macs that you used for the Nickelodeon job ?

AJA has replied that there is a 1 frame “video only” delay for the up/down/cross conversion since it is done on the hardware and the only way to compensate is to delay the audio in the sequence by 1 frame.

I’m not sure if there’s any difference and you’re in NTSC and I’m in PAL land.

-chrispy

[Christopher Tay]

Hi Bob,

There is a Dolby LM100 on the rack by the way 😛

This is actually happening at my client’s place and is a TV station. I just did a quick test back in office with some of the clips that I took back from my client’s place and I’m not seeing the delay.

This machine that I just did a quick test on is running OSX 10.5.2, Quicktime 7.4.5, FCP 6.0.3 and Kona 5.1NDD so I’m gonna try with another boot drive which has the same OS,QT,FC and Kona driver as my client’s setup and see if the problem shows up.

Walter, the ProBel VALID8 measures the audio in the SDI embedded signal. So when I feed the SD downconverted output to the ProBel VALID8, it will measure the SDI video and embedded audio to see if there’s any delay. What I’m hearing through the speakers in the FCP suite is from the analog converted AES/EBU output of the Kona 3 card. I’m using a Behringer SRC2496 AD/DA converter. I could test by taking the RCA unbalanced output from the K3-BOX to see if it makes any difference.

Right now when we feed the SD downconverted output of the Kona 3 card to a DigiBeta VTR, we can see the video delay (audio is ahead) especially on close up scenes.

Also, when we playback the HD sequence in FCP, the playback in the Canvas and the TVLogic monitor (your favourite :P) is in sync when in HD mode but when in SD downconverted mode, we can see the video is delay on the TVLogic monitor as it is not in sync with the Canvas anymore.

-chrispy

[Christopher Tay]

Forgot to add important info :

Mac Pro dual 3Ghz quadcore (latest batch) with 4GB RAM
OSX 10.5.4
Quicktime 7.5
FCP 6.0.04
Kona 3 driver 6.0

Thanks.

-chrispy