[Brian Charles]

I have 2 set-ups and 2 licences for After Effects. One Mac the other PC.

I run a G5 2.5 Ghz Quad 4 GB RAM and AE 7, as well I just purchased a MacPro 2.6 Quad Core Xeon with 2GB RAM and installed XP and After Effects.

The MacPro running XP blows away the G5 Quad for sheer processing speed.

I only wish I had bought my Nucleo Pro licence for Windows.

[Brian Charles]

Troubleshooting RAM problems is very time consuming.

There is a utility for OS X called MemTest which can automate the process. It runs a variety of tests on the RAM but takes hours to complete. Best done overnight.

[Brian Charles]

IF the issue first arose after installation of the new RAM, its a good bet that the RAM is the culprit. Due to OS cacheing and general overhead that RAM my be used below the 2GB threshold you mention.

Could be that the latency of the RAM doesn’t match other installed RAM. Check in System Profiler.

Have you tried removing the RAM to see if the problem persists?

[Brian Charles]

I have the same configuration. G5 Quad, 4.5 GB RAM.

Updated to 10.4.8 with no problems. I suggest you run Onyx or some other utilitiy and perhaps run MemTest to verify installed RAM.

[Brian Charles]

To preview audio only, press the period key on the numeric kepad.

Preview length and resolution are set in prefs, so if you’re only able to preview 8 secs or so adjust your preferences.

While you preview audio in this way you can press the asterisk key (again the one on the numeric keypad) to place layer markers to time amination with audio. (You must have a layer selected first).

[Brian Charles]

Assuming you want to control the y position using an expression.

Add 2 slider controls to the layer.

Name the first Frequency and the second Amplitude.

You can pick whip the values to the sliders or use the expression below.

Add this expression to the position property of the layer:

x = transform.position[0];
y = effect(“Amplitude”)(“Slider”)*Math.sine(effect(“Frequency”)(“Slider”)*time);
[x,y]

Now you can keyframe the sliders to control the amplitude and frequency.

[Brian Charles]

Assuming you want to control the y position using an expression.

Add 2 slider controls to the layer.

Name the first Frequency and the second Amplitude.

You can pick whip the values to the sliders or use the expression below.

Add this expression to the position property of the layer:

x = transform.position[0];
y = effect(“Amplitude”)(“Slider”)*Math.sine(effect(“Frequency”)(“Slider”)*time);
[x,y]

Now you can keyframe the sliders to control the amplitude and frequency.

[Brian Charles]

newValue = random(100);
xScale = transform.scale[0];
yScale = newValue;
[xScale,yScale]

Where newValue is what you want the y scale to be.

The example above uses a random function to produce a value but you could use any method you want here — even an expression slider to keyframe y Scale.

[Brian Charles]

newValue = random(100);
xScale = transform.scale[0];
yScale = newValue;
[xScale,yScale]

Where newValue is what you want the y scale to be.

The example above uses a random function to produce a value but you could use any method you want here — even an expression slider to keyframe y Scale.

[Brian Charles]

I’ve done this using QuickTime and H264 compression. The video played back fine on a P4 3.2 with 2 gb of RAM