![]() ![]() When you have a sound followed by silence the average will go from the volume of the sound to zero in numSamples * sampleSpacing seconds, or in this case 200 frames. If it is, the opacity is 0 and if it isn't the opacity is 100. Below is a small expression to throw on a layer's opacity that basically checks if the frame your on is prime. ![]() normalises it to 0-100% where 100% = the thresholdīasically it just averages the audio out for the last numSamples samples. I know there a million ways to solve this problem out there but I came up with a method I wanted to share just for the sake of variety. now decide if the audio is low enough to start fading Trying to learn After Effects Don't want to spend hundreds of dollars on online courses I've curated a list of all the best After Effects tutorials & organized them into a full curriculum (more to be added). I started to experiment with expressions, and it seems that communication between layers and other expressions is pretty limited. I also have two layers that contain shap. For simplicity sake, lets say this MOGRT has five layers, one is a textured background, one has a media element, and one is a semi-transparent overlay. Sum += audioAmp.valueAtTime(time - i * sampleSpacing) ĪvAudio = sum / numSamples //the average audio for all the samples Hello all, Have a quick question - Im coming from a flash/actionscript programming background and am fairly new to AE. My end goal is a MOGRT that is easily customizable for others to use. Again you will have to tweak this depending on the audio level of your material. Threshold is the audio threshold above which no fading happens. You could do a smaller sample, but given that the audio amplitude property only has one keyframe per frame it might not really help. Setting it to ameDuration means one sample per frame. SampleSpacing is the time between samples. Have a go at setting it really high, like 2000 or low like 10, and see how it works. This is the main setting that you can tweak. The values I put in here are just pulled out of my hat, you'll have to tweak them until they work for you. If you set it really high you may want to convert the expression to keyframes once you've got it working right. The higher it is, the smoother the result, but also the slower the script is. NumSamples is the number of times we sample the amplitude to get a smooth average. We want to sample that property over time, to allow for slow fadeouts.įirst, to make it easier to tweak we can set some properties that we can edit until we get the best results. (the expression on the right of the = is just what you get if you drag the pickwhip to the 'Both Channels' property). If you drag the pick-whip for the expression to the audio keyframe property you'll get an opacity that bounces all over the place like crazy, so we're going to have to do a bit more to it.įirst, in the opacity channel for your layer, set up a variable like so: var audioAmp = thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider") Then set an expression on your opacity channel. You will also appear more attractive and confident.The easiest way to do this is to use an expression. Animate Type Letters Shadow Opacity Font Size: Premium Font: Advanced. 5 would be white with 50 opacity if the property supports transparency. 0, 0, 0, 1 is black with no transparency if the color value supports transparency. These skills will surely make you more valuable at work or to a future employer. Graffiti GeneraterFree 3D text effects generator for the web and social networks. 1 Reply Jump to latest reply Rick Gerard Community Expert, LATEST Color values are always four values that run from 0 to 1. and we love you too.Īfter Effects gives you the power to create amazing visual effects and motion graphics. The truth is we want you to buy our DVDs but not all of our products are for beginners, so by teaching you the basics, you'll be in a position to take advantage of our great post production tools. To enable the expression, modify the expression to use the new names or the strings that match the language in which you are running After Effects. Nearly all of the training in this series will apply to After Effects CS3 and the Professional version of AE 6.5 & 7. The expression may not work if you are running After Effects in a different language, or if you changed the names of the items (such as layers, effects, or other property groups). This is not an overview of the software, this is a real training series that covers advanced techniques for Motion Tracking, Color Keying and even 3D Title Design. In this Free Video Training Series, you'll learn everything you need to know to start using After Effects today. ![]()
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