could someone please help me

Whenever i want to 'make movie' or 'render' any project of mine, it only takes a second to process the file and then its just a 1 second video thats blank.

i recently downloaded lagrith - a lossless codec and then i used virtualdubmod to make the files smaller.
but in the process of doing this i did a test run on a clip and it worked thats why i resumed making the rest of the files into this format.

I suspect you have "Render selection only" checked and have only a tiny selection.
Select the whole length of the movie and try again.

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Tim