closing properly camstudio_cli

everytime that i close camstudio_cli the video generated is corrupted, i have try several ways to close it and none of them works fine. i have read on the internet there are more people having the same problem that i have. i use this command to start camstudio_cli: "C:\Users\sistemas\Downloads\camstudio_cl.exe -outfile C:\Users\sistemas\Desktop\test.avi -codec 3", what could i do to close it so the file test.avi wasn´t corrupted?. i would like to record the session of a user once he logs in the computer, i would use that command at the beginning of his session to start recording but i dont know what to do to close the software at the end of his session. the only way i have achieved the file test.avi is not corrupted is entering the return key inside the ms-dos window. i dont want the user to do this since i dont want the user to be aware that i am recording his session.

thanks in advance for your help.

i look forward to getting your news.

if you need more info about this issue, just let me know.

regards.