| Feature | Specification | | :--- | :--- | | | Modified 3GPP (ISO base media file format) | | Video Codec | H.263 (most common) or MPEG-4 Part 2 (Simple Profile) | | Audio Codec | AMR-NB (Narrowband, 5.9–12.2 kbps) or AAC-LC | | Resolution | Typically QVGA (320×240) or sub-QCIF (128×96) | | Frame Rate | 12–15 fps (optimized for slow flip-phone CPUs) | | Encryption | Proprietary: often OMA DRM 1.0/2.0 (Open Mobile Alliance) with a carrier-specific key. The encryption header replaces or modifies the standard moov atom. | | File Signature | Hex header often starts with 00 00 00 XX but diverges from standard .3gp at byte 0x14, containing an encrypted odrm (Object DRM) box. |

| Factor | Explanation | | :--- | :--- | | | iPhone (2008) and Android ignored X3GP, using MP4 with FairPlay or Widevine DRM. | | Streaming > Download | Spotify, YouTube, and AbemaTV replaced purchased video clips. | | Carrier consolidation | DoCoMo, SoftBank, and au moved to unified “SmartPass” and “UULA” streaming apps. | | User frustration | Japanese consumers disliked being unable to transfer purchased videos to new phones. | | Codec evolution | H.264/AVC (in MP4) offered far better quality at bitrates lower than H.263. |

Examine OMA DRM 2.0 specifications and compare with the similar .sdv (Secure Digital Video) format used on early au (KDDI) phones.

By 2018, no major Japanese carrier sold new content as X3GP, and phones ceased including the decryption libraries. Today, X3GP files are often “orphaned” – users have old .x3gp files on discarded microSD cards but cannot play them.

Japanese X3gp Apr 2026

| Feature | Specification | | :--- | :--- | | | Modified 3GPP (ISO base media file format) | | Video Codec | H.263 (most common) or MPEG-4 Part 2 (Simple Profile) | | Audio Codec | AMR-NB (Narrowband, 5.9–12.2 kbps) or AAC-LC | | Resolution | Typically QVGA (320×240) or sub-QCIF (128×96) | | Frame Rate | 12–15 fps (optimized for slow flip-phone CPUs) | | Encryption | Proprietary: often OMA DRM 1.0/2.0 (Open Mobile Alliance) with a carrier-specific key. The encryption header replaces or modifies the standard moov atom. | | File Signature | Hex header often starts with 00 00 00 XX but diverges from standard .3gp at byte 0x14, containing an encrypted odrm (Object DRM) box. |

| Factor | Explanation | | :--- | :--- | | | iPhone (2008) and Android ignored X3GP, using MP4 with FairPlay or Widevine DRM. | | Streaming > Download | Spotify, YouTube, and AbemaTV replaced purchased video clips. | | Carrier consolidation | DoCoMo, SoftBank, and au moved to unified “SmartPass” and “UULA” streaming apps. | | User frustration | Japanese consumers disliked being unable to transfer purchased videos to new phones. | | Codec evolution | H.264/AVC (in MP4) offered far better quality at bitrates lower than H.263. | japanese x3gp

Examine OMA DRM 2.0 specifications and compare with the similar .sdv (Secure Digital Video) format used on early au (KDDI) phones. | Feature | Specification | | :--- |

By 2018, no major Japanese carrier sold new content as X3GP, and phones ceased including the decryption libraries. Today, X3GP files are often “orphaned” – users have old .x3gp files on discarded microSD cards but cannot play them. | | Factor | Explanation | | :---