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| author | Ming Qian <ming.qian@nxp.com> | 2023-01-17 02:31:54 +0000 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-04-10 14:08:53 +0100 |
| commit | ec9aa62a1e4d151e9f14b7bda0b13438a901f904 (patch) | |
| tree | cccc4f28b6a51bae6b7ab79a70f67cae12d4908e /Documentation/userspace-api | |
| parent | 9de92986daac2d859376bace6f0a4b5e85198117 (diff) | |
| download | linux-ec9aa62a1e4d151e9f14b7bda0b13438a901f904.tar.gz | |
media: add RealVideo format RV30 and RV40
RealVideo, or also spelled as Real Video, is a suite of proprietary
video compression formats developed by RealNetworks -
the specific format changes with the version.
RealVideo codecs are identified by four-character codes.
RV30 and RV40 are RealNetworks' proprietary H.264-based codecs.
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'Documentation/userspace-api')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/pixfmt-compressed.rst | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst index a0230f3576806..06b78e5589d27 100644 --- a/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst +++ b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst @@ -237,6 +237,26 @@ Compressed Formats Metadata associated with the frame to decode is required to be passed through the ``V4L2_CID_STATELESS_FWHT_PARAMS`` control. See the :ref:`associated Codec Control ID <codec-stateless-fwht>`. + * .. _V4L2-PIX-FMT-RV30: + + - ``V4L2_PIX_FMT_RV30`` + - 'RV30' + - RealVideo, or also spelled as Real Video, is a suite of + proprietary video compression formats developed by + RealNetworks - the specific format changes with the version. + RealVideo codecs are identified by four-character codes. + RV30 corresponds to RealVideo 8, suspected to be based + largely on an early draft of H.264 + * .. _V4L2-PIX-FMT-RV40: + + - ``V4L2_PIX_FMT_RV40`` + - 'RV40' + - RV40 represents RealVideo 9 and RealVideo 10. + RealVideo 9, suspected to be based on H.264. + RealVideo 10, aka RV9 EHQ, This refers to an improved encoder + for the RV9 format that is fully backwards compatible with + RV9 players - the format and decoder did not change, only + the encoder did. As a result, it uses the same FourCC. .. raw:: latex |