I also have this question, since as far as I can tell, the Save Frames to Movie node doesn't seem to behave like (correctly??) the Save Images to Movie node. So I'm converting live video into images.
Looking good! The Hold-node approach also enables feedback of everything, not just images. In theory you don't need anything but an image layer, and then you can feed that back to itself. I think I've done this before, but trying it now it seems that it breaks the composition.
You can however use an image layer or a 3D square instead of a blend node to achieve more or less the same results with fewer nodes. This also enable multiple feedback paths at the same time if that is desired. Fractal-like patterns may emerge!
(You'll need to feed the composition an image with transparency for it to work)
Magnesson - thanks for the composition - my first attempt at "hard" feedback is here: https://vuo.org/node/2601 - subsequent to that I have made others which are probably better. I think you have the image routed into the FOREGROUND of the blend image node - therefore unsuitable for some applications - ie feedback on the alpha channel behind an image.
What I would love is a simple 2d transform image node! Scaling the feedback doesn't seem possible with "resize image" so to acomplish this I did the feedback with layers.
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