Use PIPE (STDIN/STDOut) to port images to ffMPEG to Create video..

HI, Greetings to everyone
this topic is related to ffMpeg ( a command line video encoding tool)

below is the sample code to create video files from images:

that code CMD code create out.mp4 video out of the series of images like image001 image002 imagexxx image999

now to use this though vb i first need to save those images to HDD. But that's both waste of time (processing) and disk space

so, what i want, i want to use PIPE to directly send/port images from my app to ffmpeg to create that video ..

something like this:
but i am not too (even don't know at all) about Piping :( (i think it's also called stdout/stdin? )

so, any help would be highly appreciated..

thanks in advance for any upcoming help

best regards