1st of all I edited the srt file so I only get sub when people speak in nonEnglish.

Like this:

510
00:15:06,405 --> 00:15:09,203
Blah.

521
00:19:29,325 --> 00:19:32,237
Blah?

532
00:19:32,805 --> 00:19:34,602
Blah Blah.


Is this ok? or should I put 510, 511, 512 and so one for the first line?

Ok now I want to permetly add those sub to a video (Avi). So I'm trying to follow the instruction on https://www.videohelp.com/srtsubsvirtual.htm

I use the srt to ssa program to try to convert my srt file. But I get this error message: "Input file error, subtitle #1"
What is that?

Would there be a way to edit a SSA file manually?