I will try to explane in English how to do it. I have just done it with succes.
The subtitles (.srt) have to be inside of the film. So not. Try the next one.
You have a film (for example) --- Ice ace.avi --- and a .srt file for this .avi film named (for example) --- Ice ace subtitle.srt ---
Chance the .srt file in the same name like the film. And you get --- Ice ace.srt ---
Now you have to download --- any video converter 3.2.5 it's free with this link I hope it is permitted to place it here.
--- http://www.any-video-converter.com/prod ... ideo_free/
Put the .avi and the .srt file with the same name in one new file.
Select the film (top left)
Select the sub (right under/or down) (audio options, subtitles, and the select your sub.
Then push the button --- convert --- and you have to waite for a while.
I have done my best in english. I hope you wil have succes.