[Cin] exportEDL, timecode patches

[Andrea paz]

Partial success!
I changed the frame rate of the project to 24 fps. I got the same
errors with all programs.
I manually edited the created EDL file by putting the path each time
the source (test2.mp4) appeared. See attached edl file. Now in
OpenShot it opens without problems!
In Kdenlive there are the usual errors (maybe a little less? See
image); in Olive still the same error.
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