I am trying to render a video project that I created with kdenlive. It is about 50 minutes long and contains a dozen short 1080p video clips and several hundred still images (mostly 18MP). melt runs and proceeds to consume all 4GB of my RAM, at which point it is killed by the kernel.
I have tried both mlt 0.9.0 that came with Ubuntu 14.04, and I have tried the latest version, 0.9.8, that I compiled myself. No difference.
Is this indicative of a problem with melt, or is it just not realistic to render this kind of project with only 4GB of RAM?
Do you have 4 GB free RAM before launching melt? I do expect a project of that complexity and resolution to consume near 4 GB. You can readily remove half the project contents and make a test to see how it compares. There is a workaround that requires editing the project XML to set autoclose=1 on the playlists, but that is not set by default since it only works with sequential processing and will break handling in a tool that seeks such as Kdenlive.