It is not close to any definition of pornography.
Dictionary.com defines pornography as 'printed or visual material containing the explicit description or display of sexual organs or activity, intended to stimulate sexual excitement' - so yes, films and pictures of children being raped, that are produced and disseminated as masturbation aids, absolutely fit this definition.
It is abuse and vile material of the highest order.
Completely agree. And consider the fact that a lot of pornography that doesn't feature children is also abusive and vile. Some posters seem to be motivated by a desire to protect the category of 'porn' from any suggestion that it might not always be, as bingo says, a "jolly bit of consensual fun." But porn doesn't work that way. It is often produced under abusive conditions, and indeed the recording of abusive acts is often the point of it, for the consumer, in terms of its function in as a masturbation aid.
I'm not arguing that child porn isn't in its own category of unique awfulness. Quite the opposite. As I stated upthread, the term 'child abuse imagery' is actually less impactful, in terms of provoking both outrage and disgust, than 'child porn' because it deliberately excises the sexual gratification motive behind the production and consumption of those images.