I tried just few seconds ago. It works!
I used MicroDVD format and
{y:i} to indicate the italic lines.
i.e.:
Code:
{949}{1077}{y:i}Hello World! This is italic|and this line is not
{1121}{1164}Now you are reading a normal line!{y:i}And now an italic one Try for yourself
We discussed about italics in MicroDVD format almost an year ago in
this topic