Hi there,
I tried to use Quicktime instead of DV. The 4 clips are like 10x bigger and the problem remains unchanged.
I also tried to add some [change] objects wondering if I wasn't unecessarily stressing some objects forcing repeated calculations but still everything is slow as a rowing boat.
I even removed 2 clip leaving only 2, and still everything was slow. I even tried with only one clip and noticed that, although the clips was running smoothly [ctlin] had a significant delay and after I moved the fader would only reflect the changes after almost one second. Weird, isn't it?
Since I received that email from Chris Klippel suggesting I am overloading the buffers, I think I will give pix_mix another try. I guess the mix in pix_mix is done before the buffers, right?
Thanks, Nuno
-----Original Message----- From: cgclepper@gmail.com [mailto:cgclepper@gmail.com] On Behalf Of chris clepper Sent: terça-feira, 13 de Dezembro de 2005 17:22 To: Nuno Godinho Cc: PD list Subject: Re: [PD] Fading between 4 videos - performance issues
On 12/13/05, Nuno Godinho eu@nunogodinho.com wrote:
Hi,
This is a P4 at 3.2GHz with 1Gb of RAM and an ATI 9600
video card. Not
the best in the world but I would say its acceptable for my intents.
Hum... so, from what you say... what I want to do is indeed performance intensive. But how can this be if in Adobe
Premiere I can
run much more videos simultaneously and still apply some
filters on the fly?
Premiere is probably not texturing the video using OpenGL, but rather using simple accelerated overlays.
How do you intend to improve things? What alternativs do I have? Does it run smoothly in Mac? Is this a PC-only issue?
I easily get 4 720p24 clips on a dual G5 and at least 3 1080i60 ones. At least 6 DV clips are possible as well.
I thought the idea of turning off the invisible videos was
quite reasonable.
But somehow pd takes over 1 second to react and turn one
video on or off.
That should be a reasonable solution and I haven't seen the same thing happen here with turning the gemhead on and off.
I do have a problem where the first time I turn on rendering with a DirectShow or Quicktime object the output is like one frame every few seconds. Turning rendering off and back on makes everything run at full speed. Maybe try your DV clips as Quicktime rather than AVI?I could use a slightly slower framerate... But this would only be a temporary solution.
I only have the FireGL here, but I might try an Nvidia card to see if anything changes.
Thanks, Nuno