The RIFF container format is used various types of fines including WAV, AVI,
WEBP, LA, OFR, PAC and WV. According to the EXIF specification, Meta
information is embedded in two types of RIFF LIST chunks: INFO and
exif, and information about the audio content is stored in the fmt
chunk. As well as this information, some video information and proprietary
manufacturer-specific information is also extracted.
Large AVI videos may be a concatenation of two or more RIFF chunks. For these files, information is extracted from subsequent RIFF chunks as sub-documents, but the Duration is calculated for the full video.
Tag ID Tag Name Writable Values / Notes 'ALPH' ALPH - --> RIFF ALPH Tags 'ANIM' ANIM - --> RIFF ANIM Tags 'ANMF' ANMF - --> RIFF ANMF Tags 'EXIF' EXIF - --> EXIF Tags
(WebP files)'ICCP' ICC_Profile - --> ICC_Profile Tags
(WebP files)'IDIT' DateTimeOriginal N 'JUNK' OlympusJunk
CasioJunk
RicohJunk
PentaxJunk
PentaxJunk2
TextJunk-
-
-
-
-
N--> Olympus AVI Tags
--> EXIF Tags
--> Ricoh AVI Tags
--> Pentax Junk Tags
--> Pentax Junk2 Tags'JUNQ' OldXMP N 'LIST_INFO' Info - --> RIFF Info Tags 'LIST_Tdat' Tdat - --> RIFF Tdat Tags 'LIST_exif' Exif - --> RIFF Exif Tags 'LIST_hdrl' Hdrl - --> RIFF Hdrl Tags 'LIST_hydt' PentaxData - --> Pentax AVI Tags 'LIST_ncdt' NikonData - --> Nikon AVI Tags 'VP8 ' VP8Bitstream - --> RIFF VP8 Tags 'VP8L' VP8L - --> RIFF VP8L Tags 'VP8X' VP8X - --> RIFF VP8X Tags 'XMP ' XMP - --> XMP Tags
(WebP files)'_PMX' XMP - --> XMP Tags
(AVI and WAV files)'afsp' Afsp N 'bext' BroadcastExtension - --> RIFF BroadcastExt Tags 'cue ' CuePoints N 'fact' NumberOfSamples N 'fmt ' AudioFormat - --> RIFF AudioFormat Tags 'olym' Olym - --> Olympus WAV Tags
WebP alpha chunk.
Index1 Tag Name Writable Values / Notes 0 AlphaPreprocessing N [Mask 0x03]
0x0 = none
0x1 = Level Reduction0.1 AlphaFiltering N [Mask 0x03]
0x0 = none
0x1 = Horizontal
0x2 = Vertical
0x3 = Gradient0.2 AlphaCompression N [Mask 0x03]
0x0 = none
0x1 = Lossless
WebP animation chunk.
Index1 Tag Name Writable Values / Notes 0 BackgroundColor N 4 AnimationLoopCount N
WebP animation frame chunk.
Index1 Tag Name Writable Values / Notes 12 Duration N (extracted as the sum of durations of all animation frames)
RIFF INFO tags found in WAV audio and AVI video files. Tags which are part of the EXIF 2.3 specification have an underlined Tag Name in the HTML version of this documentation. Other tags are found in AVI files generated by some software.
Tag ID Tag Name Writable Values / Notes 'AGES' Rated N 'CMNT' Comment N 'CODE' EncodedBy N 'COMM' Comments N 'DIRC' Directory N 'DISP' SoundSchemeTitle N 'DTIM' DateTimeOriginal N 'GENR' Genre N 'IARL' ArchivalLocation N 'IART' Artist N 'IAS1' FirstLanguage N 'IAS2' SecondLanguage N 'IAS3' ThirdLanguage N 'IAS4' FourthLanguage N 'IAS5' FifthLanguage N 'IAS6' SixthLanguage N 'IAS7' SeventhLanguage N 'IAS8' EighthLanguage N 'IAS9' NinthLanguage N 'IBSU' BaseURL N 'ICAS' DefaultAudioStream N 'ICDS' CostumeDesigner N 'ICMS' Commissioned N 'ICMT' Comment N 'ICNM' Cinematographer N 'ICNT' Country N 'ICOP' Copyright N 'ICRD' DateCreated N 'ICRP' Cropped N 'IDIM' Dimensions N 'IDIT' DateTimeOriginal N 'IDPI' DotsPerInch N 'IDST' DistributedBy N 'IEDT' EditedBy N 'IENC' EncodedBy N 'IENG' Engineer N 'IGNR' Genre N 'IKEY' Keywords N 'ILGT' Lightness N 'ILGU' LogoURL N 'ILIU' LogoIconURL N 'ILNG' Language N 'IMBI' MoreInfoBannerImage N 'IMBU' MoreInfoBannerURL N 'IMED' Medium N 'IMIT' MoreInfoText N 'IMIU' MoreInfoURL N 'IMUS' MusicBy N 'INAM' Title N 'IPDS' ProductionDesigner N 'IPLT' NumColors N 'IPRD' Product N 'IPRO' ProducedBy N 'IRIP' RippedBy N 'IRTD' Rating N 'ISBJ' Subject N 'ISFT' Software N 'ISGN' SecondaryGenre N 'ISHP' Sharpness N 'ISMP' TimeCode N 'ISRC' Source N 'ISRF' SourceForm N 'ISTD' ProductionStudio N 'ISTR' Starring N 'ITCH' Technician N 'IWMU' WatermarkURL N 'IWRI' WrittenBy N 'LANG' Language N 'LOCA' Location N 'PRT1' Part N 'PRT2' NumberOfParts N 'RATE' Rate N 'STAR' Starring N 'STAT' Statistics N [Value 3]
0 = Bad
1 = OK'TAPE' TapeName N 'TCDO' EndTimecode N 'TCOD' StartTimecode N 'TITL' Title N 'TLEN' Length N 'TORG' Organization N 'TRCK' TrackNumber N 'TURL' URL N 'TVER' Version N 'VMAJ' VegasVersionMajor N 'VMIN' VegasVersionMinor N 'YEAR' Year N
Tag ID Tag Name Writable Values / Notes [no tags known]
These tags are part of the EXIF 2.3 specification for WAV audio files.
Tag ID Tag Name Writable Values / Notes 'ecor' Make N 'emdl' Model N 'emnt' MakerNotes N 'erel' RelatedImageFile N 'etim' TimeCreated N 'eucm' UserComment N 'ever' ExifVersion N
Tag ID Tag Name Writable Values / Notes 'IDIT' DateTimeOriginal N 'ISMP' TimeCode N 'LIST_odml' OpenDML - --> RIFF OpenDML Tags 'LIST_strl' Stream - --> RIFF Stream Tags 'avih' AVIHeader - --> RIFF AVIHeader Tags
Tag ID Tag Name Writable Values / Notes 'dmlh' ExtendedAVIHeader - --> RIFF ExtAVIHdr Tags
Index4 Tag Name Writable Values / Notes 0 TotalFrameCount N
Tag ID Tag Name Writable Values / Notes 'strd' StreamData - --> RIFF StreamData Tags 'strf' AudioFormat
VideoFormat-
---> RIFF AudioFormat Tags
--> BMP Tags'strh' StreamHeader - --> RIFF StreamHeader Tags 'strn' StreamName N
This chunk is used to store proprietary information in AVI videos from some cameras. The first 4 characters of the data are used as the Tag ID below.
Tag ID Tag Name Writable Values / Notes 'AVIF' AVIF - --> EXIF Tags 'CASI' CasioData - --> Casio AVI Tags 'Zora' VendorName N 'unknown' UnknownData N
Index2 Tag Name Writable Values / Notes 0 Encoding N --> RIFF AudioEncoding Values 1 NumChannels N 2 SampleRate N 4 AvgBytesPerSec N 7 BitsPerSample N
These "TwoCC" audio encoding codes are used in RIFF and ASF files.
Value AudioEncoding 0x1 = Microsoft PCM 0x2 = Microsoft ADPCM 0x3 = Microsoft IEEE float 0x4 = Compaq VSELP 0x5 = IBM CVSD 0x6 = Microsoft a-Law 0x7 = Microsoft u-Law 0x8 = Microsoft DTS 0x9 = DRM 0xa = WMA 9 Speech 0xb = Microsoft Windows Media RT Voice 0x10 = OKI-ADPCM 0x11 = Intel IMA/DVI-ADPCM 0x12 = Videologic Mediaspace ADPCM 0x13 = Sierra ADPCM 0x14 = Antex G.723 ADPCM 0x15 = DSP Solutions DIGISTD 0x16 = DSP Solutions DIGIFIX 0x17 = Dialoic OKI ADPCM 0x18 = Media Vision ADPCM 0x19 = HP CU 0x1a = HP Dynamic Voice 0x20 = Yamaha ADPCM 0x21 = SONARC Speech Compression 0x22 = DSP Group True Speech 0x23 = Echo Speech Corp. 0x24 = Virtual Music Audiofile AF36 0x25 = Audio Processing Tech. 0x26 = Virtual Music Audiofile AF10 0x27 = Aculab Prosody 1612 0x28 = Merging Tech. LRC 0x30 = Dolby AC2 0x31 = Microsoft GSM610 0x32 = MSN Audio 0x33 = Antex ADPCME 0x34 = Control Resources VQLPC 0x35 = DSP Solutions DIGIREAL 0x36 = DSP Solutions DIGIADPCM 0x37 = Control Resources CR10 0x38 = Natural MicroSystems VBX ADPCM 0x39 = Crystal Semiconductor IMA ADPCM 0x3a = Echo Speech ECHOSC3 0x3b = Rockwell ADPCM 0x3c = Rockwell DIGITALK 0x3d = Xebec Multimedia 0x40 = Antex G.721 ADPCM 0x41 = Antex G.728 CELP 0x42 = Microsoft MSG723 0x43 = IBM AVC ADPCM 0x45 = ITU-T G.726 0x50 = Microsoft MPEG 0x51 = RT23 or PAC 0x52 = InSoft RT24 0x53 = InSoft PAC 0x55 = MP3 0x59 = Cirrus 0x60 = Cirrus Logic 0x61 = ESS Tech. PCM 0x62 = Voxware Inc. 0x63 = Canopus ATRAC 0x64 = APICOM G.726 ADPCM 0x65 = APICOM G.722 ADPCM 0x66 = Microsoft DSAT 0x67 = Micorsoft DSAT DISPLAY 0x69 = Voxware Byte Aligned 0x70 = Voxware AC8 0x71 = Voxware AC10 0x72 = Voxware AC16 0x73 = Voxware AC20 0x74 = Voxware MetaVoice 0x75 = Voxware MetaSound 0x76 = Voxware RT29HW 0x77 = Voxware VR12 0x78 = Voxware VR18 0x79 = Voxware TQ40 0x7a = Voxware SC3 0x7b = Voxware SC3 0x80 = Soundsoft 0x81 = Voxware TQ60 0x82 = Microsoft MSRT24 0x83 = AT&T G.729A 0x84 = Motion Pixels MVI MV12 0x85 = DataFusion G.726 0x86 = DataFusion GSM610 0x88 = Iterated Systems Audio 0x89 = Onlive 0x8a = Multitude, Inc. FT SX20 0x8b = Infocom ITS A/S G.721 ADPCM 0x8c = Convedia G729 0x8d = Not specified congruency, Inc. 0x91 = Siemens SBC24 0x92 = Sonic Foundry Dolby AC3 APDIF 0x93 = MediaSonic G.723 0x94 = Aculab Prosody 8kbps 0x97 = ZyXEL ADPCM 0x98 = Philips LPCBB 0x99 = Studer Professional Audio Packed 0xa0 = Malden PhonyTalk 0xa1 = Racal Recorder GSM 0xa2 = Racal Recorder G720.a 0xa3 = Racal G723.1 0xa4 = Racal Tetra ACELP 0xb0 = NEC AAC NEC Corporation 0xff = AAC 0x100 = Rhetorex ADPCM 0x101 = IBM u-Law 0x102 = IBM a-Law 0x103 = IBM ADPCM 0x111 = Vivo G.723 0x112 = Vivo Siren 0x120 = Philips Speech Processing CELP 0x121 = Philips Speech Processing GRUNDIG 0x123 = Digital G.723 0x125 = Sanyo LD ADPCM 0x130 = Sipro Lab ACEPLNET 0x131 = Sipro Lab ACELP4800 0x132 = Sipro Lab ACELP8V3 0x133 = Sipro Lab G.729 0x134 = Sipro Lab G.729A 0x135 = Sipro Lab Kelvin 0x136 = VoiceAge AMR 0x140 = Dictaphone G.726 ADPCM 0x150 = Qualcomm PureVoice 0x151 = Qualcomm HalfRate 0x155 = Ring Zero Systems TUBGSM 0x160 = Microsoft Audio1 0x161 = Windows Media Audio V2 V7 V8 V9 / DivX audio (WMA) / Alex AC3 Audio 0x162 = Windows Media Audio Professional V9 0x163 = Windows Media Audio Lossless V9 0x164 = WMA Pro over S/PDIF 0x170 = UNISYS NAP ADPCM 0x171 = UNISYS NAP ULAW 0x172 = UNISYS NAP ALAW 0x173 = UNISYS NAP 16K 0x174 = MM SYCOM ACM SYC008 SyCom Technologies 0x175 = MM SYCOM ACM SYC701 G726L SyCom Technologies 0x176 = MM SYCOM ACM SYC701 CELP54 SyCom Technologies 0x177 = MM SYCOM ACM SYC701 CELP68 SyCom Technologies 0x178 = Knowledge Adventure ADPCM 0x180 = Fraunhofer IIS MPEG2AAC 0x190 = Digital Theater Systems DTS DS 0x200 = Creative Labs ADPCM 0x202 = Creative Labs FASTSPEECH8 0x203 = Creative Labs FASTSPEECH10 0x210 = UHER ADPCM 0x215 = Ulead DV ACM 0x216 = Ulead DV ACM 0x220 = Quarterdeck Corp. 0x230 = I-Link VC 0x240 = Aureal Semiconductor Raw Sport 0x241 = ESST AC3 0x250 = Interactive Products HSX 0x251 = Interactive Products RPELP 0x260 = Consistent CS2 0x270 = Sony SCX 0x271 = Sony SCY 0x272 = Sony ATRAC3 0x273 = Sony SPC 0x280 = TELUM Telum Inc. 0x281 = TELUMIA Telum Inc. 0x285 = Norcom Voice Systems ADPCM 0x300 = Fujitsu FM TOWNS SND 0x301 = Fujitsu (not specified) 0x302 = Fujitsu (not specified) 0x303 = Fujitsu (not specified) 0x304 = Fujitsu (not specified) 0x305 = Fujitsu (not specified) 0x306 = Fujitsu (not specified) 0x307 = Fujitsu (not specified) 0x308 = Fujitsu (not specified) 0x350 = Micronas Semiconductors, Inc. Development 0x351 = Micronas Semiconductors, Inc. CELP833 0x400 = Brooktree Digital 0x401 = Intel Music Coder (IMC) 0x402 = Ligos Indeo Audio 0x450 = QDesign Music 0x500 = On2 VP7 On2 Technologies 0x501 = On2 VP6 On2 Technologies 0x680 = AT&T VME VMPCM 0x681 = AT&T TCP 0x700 = YMPEG Alpha (dummy for MPEG-2 compressor) 0x8ae = ClearJump LiteWave (lossless) 0x1000 = Olivetti GSM 0x1001 = Olivetti ADPCM 0x1002 = Olivetti CELP 0x1003 = Olivetti SBC 0x1004 = Olivetti OPR 0x1100 = Lernout & Hauspie 0x1101 = Lernout & Hauspie CELP codec 0x1102 = Lernout & Hauspie SBC codec 0x1103 = Lernout & Hauspie SBC codec 0x1104 = Lernout & Hauspie SBC codec 0x1400 = Norris Comm. Inc. 0x1401 = ISIAudio 0x1500 = AT&T Soundspace Music Compression 0x181c = VoxWare RT24 speech codec 0x181e = Lucent elemedia AX24000P Music codec 0x1971 = Sonic Foundry LOSSLESS 0x1979 = Innings Telecom Inc. ADPCM 0x1c07 = Lucent SX8300P speech codec 0x1c0c = Lucent SX5363S G.723 compliant codec 0x1f03 = CUseeMe DigiTalk (ex-Rocwell) 0x1fc4 = NCT Soft ALF2CD ACM 0x2000 = FAST Multimedia DVM 0x2001 = Dolby DTS (Digital Theater System) 0x2002 = RealAudio 1 / 2 14.4 0x2003 = RealAudio 1 / 2 28.8 0x2004 = RealAudio G2 / 8 Cook (low bitrate) 0x2005 = RealAudio 3 / 4 / 5 Music (DNET) 0x2006 = RealAudio 10 AAC (RAAC) 0x2007 = RealAudio 10 AAC+ (RACP) 0x2500 = Reserved range to 0x2600 Microsoft 0x3313 = makeAVIS (ffvfw fake AVI sound from AviSynth scripts) 0x4143 = Divio MPEG-4 AAC audio 0x4201 = Nokia adaptive multirate 0x4243 = Divio G726 Divio, Inc. 0x434c = LEAD Speech 0x564c = LEAD Vorbis 0x5756 = WavPack Audio 0x674f = Ogg Vorbis (mode 1) 0x6750 = Ogg Vorbis (mode 2) 0x6751 = Ogg Vorbis (mode 3) 0x676f = Ogg Vorbis (mode 1+) 0x6770 = Ogg Vorbis (mode 2+) 0x6771 = Ogg Vorbis (mode 3+) 0x7000 = 3COM NBX 3Com Corporation 0x706d = FAAD AAC 0x7a21 = GSM-AMR (CBR, no SID) 0x7a22 = GSM-AMR (VBR, including SID) 0xa100 = Comverse Infosys Ltd. G723 1 0xa101 = Comverse Infosys Ltd. AVQSBC 0xa102 = Comverse Infosys Ltd. OLDSBC 0xa103 = Symbol Technologies G729A 0xa104 = VoiceAge AMR WB VoiceAge Corporation 0xa105 = Ingenient Technologies Inc. G726 0xa106 = ISO/MPEG-4 advanced audio Coding 0xa107 = Encore Software Ltd G726 0xa109 = Speex ACM Codec xiph.org 0xdfac = DebugMode SonicFoundry Vegas FrameServer ACM Codec 0xe708 = Unknown - 0xf1ac = Free Lossless Audio Codec FLAC 0xfffe = Extensible 0xffff = Development
Index4 Tag Name Writable Values / Notes 0 StreamType N 'auds' = Audio
'iavs' = Interleaved Audio+Video
'mids' = MIDI
'txts' = Text
'vids' = Video1 AudioCodec
VideoCodec
CodecN
N
N5 AudioSampleRate
VideoFrameRate
StreamSampleRateN
N
N8 AudioSampleCount
VideoFrameCount
StreamSampleCountN
N
N10 Quality N 11 SampleSize N
Index4 Tag Name Writable Values / Notes 0 FrameRate N 1 MaxDataRate N 4 FrameCount N 6 StreamCount N 8 ImageWidth N 9 ImageHeight N
This chunk is found in simple-format (lossy) WebP files. See https://developers.google.com/speed/webp/docs/riff_container for the WebP container specification.
Index1 Tag Name Writable Values / Notes 0 VP8Version N [Mask 0x0e]
0x0 = 0 (bicubic reconstruction, normal loop)
0x1 = 1 (bilinear reconstruction, simple loop)
0x2 = 2 (bilinear reconstruction, no loop)
0x3 = 3 (no reconstruction, no loop)6 ImageWidth N [Mask 0x3fff] 6.1 HorizontalScale N [Mask 0xc000] 8 ImageHeight N [Mask 0x3fff] 8.1 VerticalScale N [Mask 0xc000]
This chunk is found in lossless WebP files.
Index1 Tag Name Writable Values / Notes 1 ImageWidth N 2 ImageHeight N
This chunk is found in extended WebP files.
Index1 Tag Name Writable Values / Notes 4 ImageWidth N 6 ImageHeight N
Information found in the Broadcast Audio Extension chunk (see http://tech.ebu.ch/docs/tech/tech3285.pdf).
Index1 Tag Name Writable Values / Notes 0 Description N 256 Originator N 288 OriginatorReference N 320 DateTimeOriginal N 338 TimeReference N (first sample count since midnight) 346 BWFVersion N 602 CodingHistory N