Subtitle colours?

[Ghitulescu]

Is there any tool to change the colours of a subtitle, like old DVDSubEdit did for DVD?
I have several recordings from satellite that have subtitles printed over black solid blocks and I want to make these black blocks transparent.
The format is TS or M2TS, and the subtitles are SUP as in blu-ray.

Thank you in advance.

[Ghitulescu]

http://forum.videohelp.com/attachment.php?attachmentid=14918&d=1354252257

This is not my picture (as I don't have here a suitable player) but I put it nevertheless to show the black box (here's dark grey) which I want to make it transparent.

[Ghitulescu]

Still no ideas?

[huhn]

try this you can change the colors later with aegisub.
http://forum.doom9.org/showthread.php?t=162633

[Ghitulescu]

But I don't want to convert, which is the purpose of this utility. I simply need to change the colour palette.
I tried it and it forces me to go through OCR.
Even BDsub2sup which apparently can do this goes through a strange process which "helps" loosing the colour definitions.

[setarip_old]

Don't hold me to it (age/memory), but I believe multiAVCHD can do what you want...

[Ghitulescu]

... but I believe multiAVCHD can do what you want...

If you could point me to this, because I found nothing in this respect.