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- Extension: oma, omg
- Company: Sony
Container format used to encapsulate ATRAC3 and ATRAC3 for use with Sony's portable players. Files ending with .omg are protected with the OpenMG DRM system.
The OMA file format contains a payload scrambled with a 32-bit value . The format is known to carry MP3 and ATRAC3 audio. The metadata format is a variant of ID3v2 and uses standard ID3v2 frame types, such as TIT2, TPE1, TALB and TCON. In addition to these standard frame types, TXXX and GEOB frames contain OpenMG-specific metadata.
TXX OMG_TRACK "track number (ASCII)" TXX OMG_AGENR "content description (ASCII)" TXX OMG_ATPE1 "leader performer (ASCII)" GEOB OMG_BLKSI contains a metadata structure. observed strings include: KEYRING EKB SHARE_P_SID REFID GEOB OMG_OLINF binary blob