DualSup is a unique professional Blu-Ray subtitle tool which designed to convert a single subtitle from SRT, ASS/SSA, SST, BDN to PES, SUP or BDN format and to transfer two arbitrary subtitles with different time line to a single subtitle. For example, you can display two language subtitles like English and Chinese at the same time. Also you can show dialogue and director review subtitle simultaneously. With PES or BDN output, the third-party authoring tools like Scenarist can import it directly.
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