Scheduling image strength

[Fqlox]

I wanted to schedule the image strength in a Img2video CogxVideo I2V 1.5 5B workflow. Thus having the image lerping from strength 1.0 to 0.0. I tried using this node:

And got only integer tensors of a single element can be converted to an index, also if only the schedule value is connected I got only integer tensors of a single element can be converted to an index.

Is this something doable in this cogxvideo wrapper ?

Thanks in advance