EVENTS on SUBTITLES

[elmuz]

Hi all,
I'm using TextSub(..) filter in Avisynth.
I'd like to insert a .png image as title background...
I found two ways

1) Never implemented by VSFilter (am I wrong?)
in ASS events
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:02.00,0:00:03.99,style1,,0000,0000,0000,,te xt text
Picture: 0,0:00:02.00,0:00:03.99,style1,,0000,0000,0000,,". ../picture.png"
Dialogue: 0,0:00:03.98,0:00:07.14,style1,,0000,0000,0000,,te xt text
Dialogue: 0,0:00:07.27,0:00:07.99,style1,,0000,0000,0000,,te xt text

would be great...

2) Using overaly filter in Avisynth
- How do I get trimming information from .srt/.ass/.ssa? I want the overlay is only when text appear...

Any suggestion? If I am not clear tell me...

Thank you in advance

[elmuz]

What I'm looking for is something like

for each subtitle (file.srt/ass/..){
apply background (bg.png)
apply title()
//consider start/end of each title... reading it from file.srt/ass/..
}

Is it possible?