Video for Linux Two API Specification: Revision 0.24
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# 2.7. Reserved Format Identifiers

These formats are not defined by this specification, they are just listed for reference and to avoid naming conflicts. If you want to register your own format, send an e-mail to the V4L mailing list https://listman.redhat.com/mailman/listinfo/video4linux-list for inclusion in the `videodev.h` file. If you want to share your format with other developers add a link to your documentation and send a copy to the maintainer of this document, Michael Schimek `<mschimek@gmx.at>`, for inclusion in this section. If you think your format should be listed in a standard format section please make a proposal on the V4L mailing list.

Table 2-8. Reserved Image Formats

Identifier | Code | Details
--- | --- | ---
`V4L2_PIX_FMT_DV` | 'dvsd' | unknown
`V4L2_PIX_FMT_ET61X251` | 'E625' | Compressed format of the ET61X251 driver.
`V4L2_PIX_FMT_HI240` | 'HI24' | 8 bit RGB format used by the BTTV driver, http://bytesex.org/bttv/
`V4L2_PIX_FMT_HM12` | 'HM12' | YUV 4:2:0 format used by the IVTV driver, http://www.ivtvdriver.org/ The format is documented in the kernel sources in the file `Documentation/video4linux/cx2341x/README.hm12`
`V4L2_PIX_FMT_MJPEG` | 'MJPG' | Compressed format used by the Zoran driver
`V4L2_PIX_FMT_PWC1` | 'PWC1' | Compressed format of the PWC driver.
`V4L2_PIX_FMT_PWC2` | 'PWC2' | Compressed format of the PWC driver.
`V4L2_PIX_FMT_SN9C10X` | 'S910' | Compressed format of the SN9C102 driver.
`V4L2_PIX_FMT_WNVA` | 'WNVA' | Used by the Winnov Videum driver, http://www.thedirks.org/winnov/
`V4L2_PIX_FMT_YYUV` | 'YYUV' | unknown

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