We support importing and exporting of DSS Timed Text IMSC1.1 (.ttml, .xml) files
DSS Timed Text IMSC1.1 is an XML (TTML) timed text subtitles file. It is commonly known by the extensions .ttml, .xml. Ooona Tools has full support of importing and exporting DSS Timed Text IMSC1.1 files.