video stutters

[Greg Beckt]

I believe there is still a “bug” which makes playback stutter when your Master Audio meter is visible. There’s a thread on the Cow if you do a search. I’ve been having playback issues too and am hoping this is the cause, but haven’t been able to test it because my machine has been down for maintenance.

So try closing or scrolling your window so the meter is not visible and see if that works.

[Boronat Dario]

I tried playing out the project with the audio meters turned off. Sorry to inform that it made no difference – the video still stuttered. I might say that it was slightly better, but not by much.

I experimented and opened a PP SD/NTSC project and imoported my AJA project into it. After rendering it out, it played without any problem – no stutters at all. Did sacrifice some quality though.

This gives weight to my suspicion that the problem is with the AJA/Machina software solution.

If I can’t solve this problem I will have to junk the AJA card and look for another solution.

Dario

[Jeff Brown]

[duplicate]

[Jeff Brown]

Dario–
The COW is a good place to start, but for something like this, you should email AJA directly. Their support has been very good for me. Look under the “support” section of the (aja.com) website, they should help you fix things promptly.

-jeff

[Shawn michael Lee]

I’ve actually found their support to be completely lacking lately. I have e-mailed twice with valid questions and I get no response. Maybe I’m wrong, but I get the impression that if they can’t fix a problem, they choose to ignore it.

[Thad_h]

Hi Boronat,

The issue you’re seeing is not the same as the Master Audio Meter issue that Greg mentioned above. That one causes poor response time from the Keyboard and Mouse, not stuttering video.

If you are having stuttering video on RENDERED segments, there is almost certainly a data bottleneck either in your disk system or on your motherboard.

The just as a hunch, I would ask if you are keeping your project files on your C drive. If you are, then rendered segments will also be placed there, and not on your RAID. This would certainly cause the issue you’re describing. Try placing your project files on the RAID, then delete the rendered segments and re-render them. Adobe will then be storing these new rendered segments on the RAID and your issue should go away.

If this does not solve your issue, I recommend you call our support line for further assistance.

AJA XENA Support

[Butch Mcdonald]

I am having the same issues as described… jittery renders.
All media is going to an array with plenty of space (defraged & error checked)
After experimenting I came to the conclusion that there seemed to be some field issues. It appears that the renders were playing back or rendering in a different field order. My project was XENA preset 720×576 Pal DV. I think Pal DV & NTSC are always lower field first and everthing else is upper field first. So my next step was to setup a new project with Xena’s 720×576 Pal preset which would be upper field first. I repeated all my tests and everything seemed fine. So in conclusion I think I have either missed a setting somewhere or something is going on inside Xena or premier(Cs3) that’s not quite right. If anyone can shed any more light on this issue it would be much appreciated.
Cheers
Butch

Helping others gives you good cowma.

[Thad_h]

Butch,

Are your DV files ones that you are capturing via firewire, or are you capturing DV using the XENA from SDI or Analog sources?

What effects are you rendering to see this problem?

AJA XENA Support

[Butch Mcdonald]

When I use DV it’s from a 422 controllable deck with SDI out, everything plays normally except anything that is rendered plays fields in the wrong order.
The only reason we use AJA’s dv preset is to have the system running a bit faster and save on space, but at the moment we will just use 8bit SDI until we can work out what’s happening.
It’s a weird one… I’ll try to do more testing and see what I can find.
Cheers
Butch

Helping others gives you good cowma.

[Thad_h]

Butch,

Can you post the exact name of the AJA preset you used? Also, in the project where you are having the problem, do you have your video rendering set to DV or is set to 8-Bit YUV (which I believe is the default) ?

I am thinking that you used our 480i preset which may have its default preview rendering set to 8 bit yuv upper field first. If you are then capturing DV, the captured material may have a different field dominance than the rendered material.

If this is in fact the case, change the video rendering settings to use the DV codec in your Project Settings, and see if that resolves the issue.

AJA XENA Support