thanks again for the support .
I will elaborate the whole process.
Bascially after the lines are converted to pngs(white colored text). i manually place them (line events)in the time line as they sync with the audio of the singer.
after the placement, i create a new video layer below the text layer.
In that i put a red band (png) to fill the entire subtitle part of the video. then i make this child of the text. i change the composite mode of the text track to be mask. so now i get the red color( of the band)text instead of the white text.(Masking)
So for first line i open the pan/crop window of the red band event and change the events x-position so the masked band moves and changes the color.(actually the same text layer i create a duplicate and i put it in layer below the redband layer, with white color , therefore after this red line erases the white one shows up ). then before the next line i move the x-position of the red band back to the original position so it is ready for the next line.
so the script should create keyframes for the redband in x-position nad this key frame creation should be based on the events time position on the parent layer.
any other way to improvise the process mentioned above, also tell.
maybe i can send a screenshot to u edward ? or mail me at
arvind(at)bookbox.com