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Switching layer via audio keyframes/Sound Keys?
Is it possible to use an expression to allow either the built in audio keyframer or sound keys to switch the visible layer (say, out of a choice of 4 different layers) to the beat of the music? This would be very useful for music video editing, as I often require cuts that are precise and to the beat, and often not requiring much in the way of decision as to which layer is selected.
Thanks in advance if anyone can help!
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5 Replies
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Thanks, I was hoping to combine the first one with some other idea, but I really have no experience with expressions and am not sure exactly how to create the most effective calculation.
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You can use soundkeys to generate values according to the waveform (let’s say beat).
and use these values to drive the opacity of a number of layers. For example, generate values between 1 and 100. And through expressions tell one layer to be 100% visible when the value is between 1-25. The other layer to be visible as the value is 25-50 and so on(taking 4 layers as example).
As the number os layers go up, it can get tedious, since it’s one “if-else” expression to each layer, so i’m gessing it can compensate (opposing normal editting) if the audio is long and there aren’t many layers.
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I absolutely agree with Dave — I doubt this can be done automatically and effectively. You really don’t make any editorial decisions, just purely random cuts on the beats?
Another alternative method for marking the beats is hitting the period key on the numeric keypad to start an audio preview, then tapping the asterisk key on the numeric keypad to add markers to the composition. It’s easy to snap items on the timeline to the markers.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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Thanks for the replies, I should have made it clear that all of the clips I intended to use were just singing performance clips, and therefore no decision of editing was required, merely just music video edits. I shall use the keyframing tool in future, but it would have been interesting to have been able to automate the process!
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