Did you lower the latency of your fireface compared to the past?
What video material do you play back (codec)? Is it the codec you usually use?
Perhaps the option “Boost Video” in the video device panel is a Workaround (But could make it worse too 
)
Is you project big? Does it charge your system to its capacity?
Did you update to 5.5 recently?
If none of my questions is answered with “yes”, than there must be something wrong with your firewire latency… The IRQ sharing could be an indication.
That’s what bugs me, no.
Buffer like it was (1024).
I suspected codec, but my past sessions behave the same (as does the new one with MJPEG, as always).
Had 5.5 for a few productions now (-> used to work fine).
The current session doesn’t go into red on the VST CPU meter, and the onboard sound works flawlessly. The older mix sessions were medium heavy and dropout now. Used to work on them for hours (90 min doco mix, the current is just a few seconds long.)
Bodo thanks for the suggestions so far. Still has me puzzled this.
Maybe this link can help you:
http://www.stantondj.com/activekb/questions.php?questionid=1
If not:
Do you have another firewire audio interface by any chance?
If you had any you could try to narrow the cause down to the specific hardware or firewire in general.
Did you do any bios updates/ changes?
Thank you, I tried the ACPI advice, no luck. I noticed I have two instances on my list though - maybe an issue? (I think my notebook somehow accepts two batteries in theory though).
I’m no the legacy fw driver for Win7 already, others didn’t work, and I also tried a pmcmia adapter with a ricoh or nec though, far worse performance.
Really stumped. I guess 2012 will need to see a new system coming, but I prefer a mobile setup and the list on notebooks with FW and esp. a TI chip plus the features I would like it to have… pretty short for now.
I might give N4 a go when I get back, but so far N5.5 has been fine for me with no real reason to go back yet.
Oh and of course a Happy, Healthy and Harmonic New Year to you all!!
Just saw - under system performance I re-tested and the windows performance for the aero-graphics dropped from 4,1 to 2,2 - something HAS screwed up the gfx performance!
OK the system Windows-performance rating issue was due to powersaving option.
BUT I have just tested: Only video and one audio file in N5.5 stutters badly. Same setup, same video and audio track in N4 runs smooth as butter.
So somehow the N5.5 video engine has been screwed or doesn’t behave like it used to. Any ideas what could be causing this? Desperate for a solution before the next Nuendo job comes up!
Cheers,
Andrew
Andrew: I have the same setup as you (as you know) and now same/similar problem. I used to have a big problem with video playback on 5.5 and 5.1. But thanks to you it was solved.
Now video and audio playback works smooth with N5.1.
But with N5.5 I have clean audio PB until I open video screen (F8). Audio starts to jump and soon audio PB stops. No audio output and no metering on audiotracks.
After reseting VST audio system audio is back, stuttering again and then audio/metering disappears. It seems that audio PB tries to sync to video but fails resulting no audio PB what so ever…
Without audio, video runs smooth on N5.5?! Add only one audio track and insert audio to that track --> first stuttering , then no audio. Video PB still smooth…
I can use N5.1 for movie work but this is not good…
So I agree with Andrew, something is screwed in Nuendo 5.5 video playback. It might be system related as it happens on two similar systems, but it is only with N5.5. 5.1 works fine. What was changed from 5.1.–> to 5.5. concerning video engine? And can it be fixed???
Bye / Tumppi
bumb, anyone any succestios?
Hi,
One of the developers is looking into it.
Fredo
Thank you…
Has he/she been onto it long time or just started? Just curious 
Bye / Tumppi
Any news on this?
Bye / Tumppi
Any news?
Bye / Tumppi
Following up on this thread too.
Has any progress been made for a fix on this?
?
that is like… Bumb
Come on, shed some light into this…
Bye / Tumppi
Hello Tumppi and wavcatcher,
@Tumppi:
Do you have another firewire audio interface by any chance?
If you had any you could try to narrow the cause down to the specific hardware or firewire in general.
@wavcatcher:
Can you please explain your problems?
Do you have the problems with the system mentioned in your signature?
Best Regards
I can try it with M-Audio FW410, when I can find the time.
Bye / Tumppi
Trumppi, Andrew,
here is another try: Can you please check if the symptom is dependent to 32-bit plug-ins running in 64-bit Nuendo?
If you have 32-bit plug-ins running, please unload them and see if the problem remains. It is possible that we are seeing a conflict between the VST-Bridge and the video engine.
Thanks,
Thorsten
I’m still using 32bit Nuendo…
Bye / Tumppi
Just saw now that you are looking into this - GREAT!
As for 64 - I’m on 32bit also.
Any idea if 5.5.5 will solve this?
Thanks for trying to help, Bodo!