效果：如何使用表达式（或其他脚本方式）更改音频源？

Question

I need to generate many videos that differs only by some Text objects and sound. So I use command "aerender" and expressions that get source text from enviropment varibles.

I easially use expressions to change Sorce Text. But I can't use it to change audio source. Option "Animation-> Add Expression" is inactive, when "Audio->Waveform" is selected on "Timeline" panel.

So, how to change audio source using expressions (or other script way)?

PS Audio is added using "File -> Import". Shall I add audio using other way?

Answer 1

You could use extendscript to duplicate your original comp, exchange the audio layer and add them to the render queue.
Or you can use the render queues RenderQueueItem status attribute to execute the change on onStatusChanged . (Also in extendscript) This can execute a callback function where you could exchange your audio layer. This could be done in a recursive way.