StartMediaStoreCut Field Type Repeated Description id string cuts SingleCut ✅ file_name string file_format StartMediaStoreCut.FileFormat language_mapping LanguageMapping ✅ fast_start bool partial_encode_settings oneOf ⮑x264_params X264Codec ⮑x265_params X265Codec sequence_header_handling StartMediaStoreCut.SequenceHeaderHandling Member of Message Description MediaStoreCutRequest ST2110SenderSource.TagsEntry StreamAlignConfiguration