M2TS is a filename extension used for the Blu-ray Disc Audio-Video (BDAV) MPEG-2 Transport Stream container file format. It is used for high-definition video on Blu-ray Discs and AVCHD camcorders. The M2TS format supports multiple video and audio streams, as well as metadata and interactive menus. It's based on the MPEG-2 transport stream container, which is designed for multiplexing digital audio, video, and data. M2TS files can contain video encoded with codecs such as H.264/AVC, MPEG-2, or VC-1, and audio encoded with codecs such as Dolby Digital (AC-3), DTS, or LPCM. Due to its high-definition nature and complex structure, M2TS files often require specialized software or hardware for playback and editing. The format is commonly used for archiving high-quality video recordings from camcorders and Blu-ray discs, preserving the original quality and features of the source material. The M2TS format is a crucial component of the Blu-ray Disc ecosystem, enabling the delivery of high-definition content to consumers.