Conversion script between the TTML & SRT subtitle formats. This is particularly useful with Adobe Premiere, as it doesn't understand the SRT format (which is joyously simple and interoperable). TTML-XML is probably the most straightforward subtitle format it does understand, hence this tool.
Note that due to the simplicity of the SRT format, this conversion is extremely lossy for all the bells and whistles supported by TTML. Not like you'd want fixed-pixel font sizes etc in your subtitles anyway, but you've been warned.