Image-based subtitles for JW Player

JWplayer already has a very good captions plugin, I need it to be modified to show subtitles from individual PNG files instead of text files, due to the difficulty of OCR on non-roman scripts. Subtitles are provided as an XML file with the timing information, and a lot of PNGs for each subtitle (sample is attached to this post). Correct scaling of the images must also be maintained Other functionality of the plugin should remain, such as language selection.