So i was making a Composition like 34 secs long then suddenly when I try to RAM preview it the rendered frames was only going on 30 but when i lowered the resolution down to third it renders 334 frames over 1946 frames. how do I fix this so i could RAM preview or render all of the frames.?
The length of your RAM preview is determined by the amount of RAM you have on your system. Not knowing details about what you run AE on I can not be specific but it is normal to get a longer preview at lower resolutions. Also for longer comps you may not be able to preview the whole project, unless you have tons of RAM. You may want to render out at a lower resolution or preview from RAM a chunk of your project at a time by setting the work area to the max your RAM can play and then moving it to where you want to preview.