I have four .mpg files (made from eyetv export) I want to join. I can easily join 1 and 2 to make a file 1+2, also 3 and 4 to make 3+4. But when I then try to join the two files 1+2 and 3+4 it doesn't work. The info printout gives

could not allocate Buffer of Size -1, Option Preserve Header now disabled!
could not allocate Buffer of Size -1, Option Preserve Header now disabled!
followed by "i'm lost" ciao

Any suggestions?

Thanks