[Lukimon]

Sorry, no solution here..
I’m surprised not more people have this problem – I’ve had it for ages (years?) and still don’t know what causes it.
My system –
AMD 3500
WinXpPro
radeon graphics
sony trv-33 for output to monitor
onboard sound card

It does stop doing this when I Export to Tape though – which is good… it’s like the firewire service keeps getting unterrupted until Premiere (or whatever, After Effects for eg) decides it needs uninterrupted access… Very Weird.
I’ve tried different cables, different motherboards, using firewire card or onboard motherboard firewire, disabling one etc…
Hope this helps, adding to the original post…

[Lukimon]

Just in case anyone was still thinking about this – I’ve discovered it also is happening on dv projects, so it’s not a decklink thing.
Now I really have no idea…
But thanks for your responses.

[Lukimon]

As an update, i think it might be a CPU thing. Anyone know if too much strain on the cpu can cause this type of effect?
I’m trying to work out what might have happened, it’s an Athlon64 3500 Newcastle chip, Asus A8V deluxe mb, all seems to be running at the correct frequencies…

[Lukimon]

Thanks for the response, Matt. The preset I’m using is the Blackmagic 10bit 16×9 PAL.

It seems to happen no matter what’s playing from the timeline, as in raw captured clips, rendered clips (all renders going to the capture array), and shots exported from After Effects (using BMD 10bit codec). The audio is from an aif given to me by the artist. Strangely playback is also affected when playing the video clips in the souce window, so not just the timeline.

It’s just I’ve been working on the clip for ages and it only occured after I installed the newest drivers days ago. Apart from that I hadn’t changed a thing.

Can I provide any more info?

[Lukimon]

Thanks for the suggestion, but no, didn’t help. What I’m working on is a music video, and when I play the audio track in the source window it sounds right, but when from the timeline, it’s like there’s just no consistancy in the time/speed/pitch – only slightly though most of the time. occasionally it slows right down…

Slow hard drives would only affect framerate, not actual playback speed wouldn’t they?

Any BMD people got any ideas?

Cheers.

[Lukimon]

Thanks Bill. I guess that’s a possibility – I’ve already had to replace one bad drive, losing everything of course (almost, could salvage a lot before wiping the array), so the new array is only about a month old, and I tested each drive before creating the array as well and both were what I expected (have about 7 seagates). The ‘slow down’ is gradual, but fairly quick, not like simply dropping frames – the waivering pitch of the audio sounds like piano music on an old 16mm student film from the 80’s, if you know what I mean – that’s the wierd part – actual playback speed is affected, not just the playback framerate.
And it happened after installing the latest drivers.