| GLZW | Motion LZW | gabest@freemail.hu |
| GPEG | Motion JPEG | gabest@freemail.hu |
| GWLT | Microsoft Greyscale WLT DIB | Microsoft |
| H261 | [[codec:h261;ITU H.261]] | Intel |
| H263 | [[codec:h263;ITU H.263]] | Intel |
| H264 | [[codec:h264;ITU H.264]] | Intel |
| HFYU | Huffman Lossless Codec | Huffman codec for YUV and RGB formats, for lossless conversions video editings. |
| HM*R | Rendition Motion Compensation | Rendition |
| I263 | [[codec:ffmpeg;FFmpeg]] [[codec:I263;I263 decoder]] | |
| i263 | [[codec:I263;ITU H.263]] | Intel |
| I420 | RAW I420 |
| IAN | [[codec:indeo;Indeo 4 Codec]] | Intel |
| ICLB | CellB Videoconferencing Codec | InSoft |
| IF09 | [[codec:indeo;Indeo YVU9]] |
| IGOR | Power DVD |
| IJPG | Intergraph JPEG | Intergraph |
| ILVC | Layered Video | Intel |
| ILVR | [[codec:h264;ITU H.263+ Codec]] |
| IPDV | Giga AVI DV Codec | I-O Data Device, Inc. |
| IPJ2 | ImagePower MJPEG2000 |
| IR21 | [[codec:indeo;Indeo 2.1]] | Intel |
| IRAW | Intel YUV Uncompressed | Intel |
| IUYV | Interlaced version of UYVY | [[xlnk:www.leadtools.com]] |
| IV3(0-1) | [[codec:indeo;Indeo Video]] | Intel Corporation |
| IVnn | [[codec:indeo;Indeo Video]] IV41 IV50 | Ligos |
| IY41 | Interlaced version of Y41P | [[xlnk:www.leadtools.com]] |
| IYU1 | 12 bit IEEE 1394 Digital Camera | IEEE standard |
| IYU2 | 24 bit IEEE 1394 Digital Camera | IEEE standard |
| IYUV | Planar YUV format |
| JBYR | | Kensington? |
| JPEG | Still Image JPEG DIB | Microsoft Corporation |
| JPGL | Pegasus Lossless Motion JPEG | [[xlnk:www.jpg.com]] |
| KMVC | Karl Morton's Video Codec (presumably) | Team17 Software |
| LCW2 | Lead CMW wavelet 2.0 |
| LEAD | LEAD Video Codec | Lead Technologies |
| Ljpg | LEAD MJPEG Codec | Lead Technologies |
| LSVM | Vianet Lighting Strike Vmail (Streaming) | [[xlnk:www.vianet.com]] |
| LIBDV | Quasar DV | Codec for DV video, the encoding format used by most digital camcorders |
| M26n | H.261 - H.263 | Microsoft |
| M4S2 | Fully Compliant MPEG-4 v2 | Microsoft |
| MC12 | Motion Compensation Format | ATI Technologies |
| MCAM | Motion Compensation Format | ATI Technologies |
| MDVD | Alex MicroDVD Video | [[xlnk:www.tiasoft.de]] |
| MJ2C | Morgan Multimedia JPEG2000 Compression | [[xlnk:www.morgan-multimedia.com]] |
| MJP(A-B) | Morgan Motion JPEG Codec | [[xlnk:www.morgan-multimedia.com]] |
| mJPG | [[codec:mjpeg;Motion JPEG including Huffman Tables]] | IBM |
| MJPG | Motion JPEG DIB Format | Microsoft Corporation |
| MMES | Matrox MPEG-2 I-frame | Matrox |
| MP1e | Small MPEG1 encoder based on ffmpeg, optimized for SSE, MMX, 3DNow!, etc. |
| MP2* | [[codec:mpeg-4;S-Mpeg 4]] | Microsoft |