BUG: Rendering a project with JPG as part of composite causes runaway RAM when NVIDIA GPU is enabled under "hardware acceleration" NOTE: Revealed in 1st 2 comments below, same problem when just playing a project w/JPG and GPU enabled.
This has been a bug for a long while now -- I made a video demonstrating the problem; maybe it will help get it squashed? It is very easy to reproduce.
Synopsis of that demo video
With hardware accelerated video enabled, render a small project that include a not-tiny JPG file. Add other elements so the render takes a while. Observing memory usage in Task Manger you'll observe it climbing higher and higher throughout the render until the render completes or it crashes from no more memory.
Turning off hardware accelerated video, render the same project and observe memory usage. It remains constant throughout the render, with no issue.