reader.reset(new sub::SubripReader(utf8.get()));
} else if (ext == ".ssa" || ext == ".ass") {
reader.reset(new sub::SSAReader(utf8.get()));
reader.reset(new sub::SubripReader(utf8.get()));
} else if (ext == ".ssa" || ext == ".ass") {
reader.reset(new sub::SSAReader(utf8.get()));