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| This section documents the code-points used to identify codecs, or sample (access unit) formats. These are the four-character codes of sample entries (sample descriptions) in ISO media files.
Requests for a code-point in this area should identify the specification of the coding system, as well as the specification where the code-point is defined. The definition of the code-point should document the sample (access unit) format as well as the sample entry (sample description) format. Note that extra boxes (atoms) within the sample entry, which are specific to that coding system, need not be, and usually are not, registered. Requests for a code-point in this area will normally also cause an objectTypeIndication to be allocated, so that the coding system can be used in MPEG-4 systems. Please indicate if this is not desirable. Note well: the existence of an ObjectType identification here does not document in which contexts, if any, that code-point may be used. The documentation must be consulted. ISO Code Points (see below for QuickTime code points) |
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| Code | Abstract | Type | Defined in/by | ObjectType |
| ac-3 | AC-3 audio | Audio | ETSI | 0xA5 |
| alac | Apple lossless audio codec | Audio | Apple | |
| avc1 | Advanced Video Coding | Video | AVC | 0x20 |
| avc2 | Advanced Video Coding | Video | AVC | 0x20 |
| avcp | Advanced Video Coding Parameters | Video | AVC | 0x20 |
| dra1 | DRA Audio | Audio | DRA | 0xA7 |
| drac | Dirac Video Coder | Video | Dirac | 0xA4 |
| dtsc | DTS Coherent Acoustics audio | Audio | DTS | 0xA9 |
| dtse | DTS Express low bit rate audio, also known as DTS LBR | Audio | DTS | 0xAC |
| dtsh | DTS-HD High Resolution Audio | Audio | DTS | 0xAA |
| dtsl | DTS-HD Master Audio | Audio | DTS | 0xAB |
| ec-3 | Enhanced AC-3 audio | Audio | ETSI | 0xA6 |
| enca | Encrypted/Protected audio | Audio | ISMAc, ISO | |
| encs | Encrypted Systems stream | System | ISO | |
| enct | Encrypted Text | Text | ISO | |
| encv | Encrypted/protected video | Video | ISMAc, ISO | |
| fdp$20 | File delivery hints | Hint | ISO | |
| g719 | ITU-T Recommendation G.719 (2008) | Audio | ITU G.719 | 0xA8 |
| g726 | ITU-T Recommendation G.726 (1990) | Audio | SDV | |
| ixse | DVB Track Level Index Track | Metadata | DVB | |
| m2ts | MPEG-2 transport stream for DMB | Hint | DMB-MAF | |
| m4ae | MPEG-4 Audio Enhancement | Audio | MP4v1 | |
| m4ae | MPEG-4 Audio Enhancement | Audio | MP4v2 | 0x40, others |
| mett | Text timed metadata | Metadata | ISO | |
| metx | XML timed metadata | Metadata | ISO | |
| mjp2 | Motion JPEG 2000 | Video | MJ2 | |
| mlix | DVB Movie level index track | Metadata | DVB | |
| mlpa | MLP Audio | Audio | Dolby MLP | |
| mp4a | MPEG-4 Audio | Audio | MP4v1 | 0x40, others |
| mp4s | MPEG-4 Systems | (Var.) | MP4V1 | various |
| mp4v | MPEG-4 Visual | Video | MP4V1 | 0x20, others |
| mvc1 | Multiview coding | Video | AVC | |
| mvc2 | Multiview coding | Video | AVC | |
| oksd | OMA Keys | Metadata | OMA DRM XBS | |
| pm2t | Protected MPEG-2 Transport | Hint | ISO | |
| prtp | Protected RTP Reception | Hint | ISO | |
| raw$20 | Uncompressed audio | Audio | MJ2 | |
| rm2t | MPEG-2 Transport Reception | Hint | ISO | |
| rrtp | RTP reception | Hint | ISO | |
| rsrp | SRTP Reception | Hint | ISO | |
| rtp$20 | RTP Hints | Hint | ISO | n/a |
| s263 | ITU H.263 video (3GPP format) | Video | 3GPP | |
| samr | Narrowband AMR voice | Audio | 3GPP | |
| sawb | Wideband AMR voice | Audio | 3GPP | |
| sawp | Extended AMR-WB (AMR-WB+) | Audio | 3GPP | |
| sevc | EVRC Voice | Audio | 3GPP2 | 0xA0 |
| sm2t | MPEG-2 Transport Server | Hint | ISO | |
| sqcp | 13K Voice | Audio | 3GPP2 | 0xE1 |
| srtp | SRTP Hints | Hint | ISO | n/a |
| ssmv | SMV Voice | Audio | 3GPP2 | 0xA1 |
| stpp | Sub-titles (Timed Text) | Text | DECE | |
| svc1 | Scalable Video Coding | Video | AVC | |
| svcM | SVC metadata | Metadata | AVC | |
| text | Textual meta-data with MIME type | Metadata | MPEG4 | |
| twos | Uncompressed 16-bit audio | Audio | MJ2 | |
| tx3g | Timed Text stream | Text | 3GPP | |
| urim | URI identified timed metadata | Metadata | ISO | |
| vc-1 | SMPTE VC-1 | Video | SMPTE | 0xA3 |
| xml$20 | XML-formatted meta-data | Metadata | MPEG4 |
| Code | Abstract | Type | Defined in/by |
| CFHD | CineForm High-Definition (HD) wavelet codec | Video | CineForm |
| DV10 | Digital Voodoo 10 bit Uncompressed 4:2:2 codec | Video | Digital Voodoo |
| DVOO | Digital Voodoo 8 bit Uncompressed 4:2:2 codec | Video | Digital Voodoo |
| DVOR | Digital Voodoo intermediate raw | Video | Digital Voodoo |
| DVTV | Digital Voodoo intermediate 2vuy | Video | Digital Voodoo |
| DVVT | Digital Voodoo intermediate v210 | Video | Digital Voodoo |
| HD10 | Digital Voodoo 10 bit Uncompressed 4:2:2 HD codec | Video | Digital Voodoo |
| M105 | Internal format of video data supported by Matrox hardware; pixel organization is proprietary | Video | Matrox |
| PNTG | Apple MacPaint image format | Video | QT |
| QDM2 | Qdesign music 2 | Audio | QT |
| QDMC | Qdesign music 1 | Audio | QT |
| Qclp | Qualcomm PureVoice | Audio | QT |
| SVQ1 | Sorenson Video 1 video | Video | QT |
| SVQ3 | Sorenson Video 3 video | Video | QT |
| Shr0 | Generic SheerVideo codec | Video | BitJazz |
| Shr1 | SheerVideo RGB[A] 8b - at 8 bits/channel | Video | BitJazz |
| Shr2 | SheerVideo Y'CbCr[A] 8bv 4:4:4[:4] - at 8 bits/channel, in ITU-R BT.601-4 video range | Video | BitJazz |
| Shr3 | SheerVideo Y'CbCr 8bv 4:2:2 - 2:1 chroma subsampling, at 8 bits/channel, in ITU-R BT.601-4 video range | Video | BitJazz |
| Shr4 | SheerVideo Y'CbCr 8bw 4:2:2 - 2:1 chroma subsampling, at 8 bits/channel, with full-range luma and wide-range two's-complement chroma | Video | BitJazz |
| WRLE | Windows BMP image format | Video | QT |
| agsm | GSM | Audio | QT |
| alaw | a-Law | Audio | QT |
| civd | Cinepak Video | Video | QT |
| drac | Dirac Video Coder | Video | Dirac |
| dvh5 | DVCPRO-HD 1080/50i | Video | QT |
| dvh6 | DVCPRO-HD 1080/60i | Video | QT |
| dvhp | DVCPRO-HD 720/60p | Video | QT |
| dvi$20 | DVI (as used in RTP, 4:1 compression) | Audio | QT |
| fl32 | 32 bit float | Audio | QT |
| fl64 | 64 bit float | Audio | QT |
| flic | Autodesk FLIC animation format | Video | QT |
| gif | GIF image format | Video | QT |
| h261 | ITU H.261 video | Video | QT |
| h263 | ITU H.263 video (QuickTime format) | Video | QT |
| ima4 | IMA (International Multimedia Assocation, defunct, 4:1) | Audio | QT |
| in24 | 24 bit integer uncompressed | Audio | QT |
| in32 | 32 bit integer uncompressed | Audio | QT |
| jpeg | JPEG image format | Video | QT |
| lpcm | Uncompressed audio (various integer and float formats) | Audio | QT |
| mjpa | Motion-JPEG (format A) | Video | QT |
| mjpb | Motion-JPEG (format B) | Video | QT |
| png | W3C Portable Network Graphics (PNG) | Video | QT |
| rle$20 | Apple animation codec | Video | QT |
| rpza | Apple simple video 'road pizza' compression | Video | QT |
| tga | Truvision Targa video format | Video | QT |
| tiff | Tagged Image File Format (Adobe) | Video | QT |
| ulaw | Samples have been compressed using uLaw 2:1. | Audio | QT |
| vdva | DV audio (variable duration per video frame) | Audio | QT |