1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
8 .. _compressed-formats:
14 .. tabularcolumns:: |p{5.8cm}|p{1.2cm}|p{10.3cm}|
16 .. cssclass:: longtable
18 .. flat-table:: Compressed Image Formats
26 * .. _V4L2-PIX-FMT-JPEG:
28 - ``V4L2_PIX_FMT_JPEG``
30 - TBD. See also :ref:`VIDIOC_G_JPEGCOMP <VIDIOC_G_JPEGCOMP>`,
31 :ref:`VIDIOC_S_JPEGCOMP <VIDIOC_G_JPEGCOMP>`.
32 * .. _V4L2-PIX-FMT-MPEG:
34 - ``V4L2_PIX_FMT_MPEG``
36 - MPEG multiplexed stream. The actual format is determined by
37 extended control ``V4L2_CID_MPEG_STREAM_TYPE``, see
38 :ref:`mpeg-control-id`.
39 * .. _V4L2-PIX-FMT-H264:
41 - ``V4L2_PIX_FMT_H264``
44 The decoder expects one Access Unit per buffer.
45 The encoder generates one Access Unit per buffer.
46 If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
47 then the decoder has no requirements since it can parse all the
48 information from the raw bytestream.
49 * .. _V4L2-PIX-FMT-H264-NO-SC:
51 - ``V4L2_PIX_FMT_H264_NO_SC``
53 - H264 video elementary stream without start codes.
54 * .. _V4L2-PIX-FMT-H264-MVC:
56 - ``V4L2_PIX_FMT_H264_MVC``
58 - H264 MVC video elementary stream.
59 * .. _V4L2-PIX-FMT-H264-SLICE:
61 - ``V4L2_PIX_FMT_H264_SLICE``
63 - H264 parsed slice data, including slice headers, either with or
64 without the start code, as extracted from the H264 bitstream.
65 This format is adapted for stateless video decoders that implement an
66 H264 pipeline with the :ref:`stateless_decoder`.
67 This pixelformat has two modifiers that must be set at least once
68 through the ``V4L2_CID_STATELESS_H264_DECODE_MODE``
69 and ``V4L2_CID_STATELESS_H264_START_CODE`` controls.
70 In addition, metadata associated with the frame to decode are
71 required to be passed through the ``V4L2_CID_STATELESS_H264_SPS``,
72 ``V4L2_CID_STATELESS_H264_PPS``,
73 ``V4L2_CID_STATELESS_H264_SCALING_MATRIX``,
74 ``V4L2_CID_STATELESS_H264_SLICE_PARAMS`` and
75 ``V4L2_CID_STATELESS_H264_DECODE_PARAMS`` controls. See the
76 :ref:`associated Codec Control IDs <v4l2-codec-stateless-h264>`.
77 Exactly one output and one capture buffer must be provided for use
78 with this pixel format. The output buffer must contain the
79 appropriate number of macroblocks to decode a full
80 corresponding frame to the matching capture buffer.
82 The syntax for this format is documented in :ref:`h264`, section
83 7.3.2.8 "Slice layer without partitioning RBSP syntax" and the following
86 * .. _V4L2-PIX-FMT-H263:
88 - ``V4L2_PIX_FMT_H263``
90 - H263 video elementary stream.
91 * .. _V4L2-PIX-FMT-MPEG1:
93 - ``V4L2_PIX_FMT_MPEG1``
95 - MPEG1 Picture. Each buffer starts with a Picture header, followed
96 by other headers as needed and ending with the Picture data.
97 If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
98 then the decoder has no requirements since it can parse all the
99 information from the raw bytestream.
100 * .. _V4L2-PIX-FMT-MPEG2:
102 - ``V4L2_PIX_FMT_MPEG2``
104 - MPEG2 Picture. Each buffer starts with a Picture header, followed
105 by other headers as needed and ending with the Picture data.
106 If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
107 then the decoder has no requirements since it can parse all the
108 information from the raw bytestream.
109 * .. _V4L2-PIX-FMT-MPEG2-SLICE:
111 - ``V4L2_PIX_FMT_MPEG2_SLICE``
113 - MPEG-2 parsed slice data, as extracted from the MPEG-2 bitstream.
114 This format is adapted for stateless video decoders that implement a
115 MPEG-2 pipeline with the :ref:`stateless_decoder`.
116 Metadata associated with the frame to decode is required to be passed
117 through the ``V4L2_CID_STATELESS_MPEG2_SEQUENCE`` and
118 ``V4L2_CID_STATELESS_MPEG2_PICTURE`` controls.
119 Quantisation matrices can optionally be specified through the
120 ``V4L2_CID_STATELESS_MPEG2_QUANTISATION`` control.
121 See the :ref:`associated Codec Control IDs <v4l2-codec-stateless-mpeg2>`.
122 Exactly one output and one capture buffer must be provided for use with
123 this pixel format. The output buffer must contain the appropriate number
124 of macroblocks to decode a full corresponding frame to the matching
126 * .. _V4L2-PIX-FMT-MPEG4:
128 - ``V4L2_PIX_FMT_MPEG4``
130 - MPEG4 video elementary stream.
131 * .. _V4L2-PIX-FMT-XVID:
133 - ``V4L2_PIX_FMT_XVID``
135 - Xvid video elementary stream.
136 * .. _V4L2-PIX-FMT-VC1-ANNEX-G:
138 - ``V4L2_PIX_FMT_VC1_ANNEX_G``
140 - VC1, SMPTE 421M Annex G compliant stream.
141 * .. _V4L2-PIX-FMT-VC1-ANNEX-L:
143 - ``V4L2_PIX_FMT_VC1_ANNEX_L``
145 - VC1, SMPTE 421M Annex L compliant stream.
146 * .. _V4L2-PIX-FMT-VP8:
148 - ``V4L2_PIX_FMT_VP8``
150 - VP8 compressed video frame. The encoder generates one
151 compressed frame per buffer, and the decoder requires one
152 compressed frame per buffer.
153 * .. _V4L2-PIX-FMT-VP8-FRAME:
155 - ``V4L2_PIX_FMT_VP8_FRAME``
157 - VP8 parsed frame, including the frame header, as extracted from the container.
158 This format is adapted for stateless video decoders that implement an
159 VP8 pipeline with the :ref:`stateless_decoder`.
160 Metadata associated with the frame to decode is required to be passed
161 through the ``V4L2_CID_STATELESS_VP8_FRAME`` control.
162 See the :ref:`associated Codec Control IDs <v4l2-codec-stateless-vp8>`.
163 Exactly one output and one capture buffer must be provided for use with
164 this pixel format. The output buffer must contain the appropriate number
165 of macroblocks to decode a full corresponding frame to the matching
168 * .. _V4L2-PIX-FMT-VP9:
170 - ``V4L2_PIX_FMT_VP9``
172 - VP9 compressed video frame. The encoder generates one
173 compressed frame per buffer, and the decoder requires one
174 compressed frame per buffer.
175 * .. _V4L2-PIX-FMT-HEVC:
177 - ``V4L2_PIX_FMT_HEVC``
179 - HEVC/H.265 Access Unit.
180 The decoder expects one Access Unit per buffer.
181 The encoder generates one Access Unit per buffer.
182 If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
183 then the decoder has no requirements since it can parse all the
184 information from the raw bytestream.
185 * .. _V4L2-PIX-FMT-HEVC-SLICE:
187 - ``V4L2_PIX_FMT_HEVC_SLICE``
189 - HEVC parsed slice data, as extracted from the HEVC bitstream.
190 This format is adapted for stateless video decoders that implement a
191 HEVC pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
192 This pixelformat has two modifiers that must be set at least once
193 through the ``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE``
194 and ``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE`` controls.
195 Metadata associated with the frame to decode is required to be passed
196 through the following controls:
197 ``V4L2_CID_MPEG_VIDEO_HEVC_SPS``,
198 ``V4L2_CID_MPEG_VIDEO_HEVC_PPS``, and
199 ``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS``.
200 See the :ref:`associated Codec Control IDs <v4l2-mpeg-hevc>`.
201 Buffers associated with this pixel format must contain the appropriate
202 number of macroblocks to decode a full corresponding frame.
206 This format is not yet part of the public kernel API and it
207 is expected to change.
208 * .. _V4L2-PIX-FMT-FWHT:
210 - ``V4L2_PIX_FMT_FWHT``
212 - Video elementary stream using a codec based on the Fast Walsh Hadamard
213 Transform. This codec is implemented by the vicodec ('Virtual Codec')
214 driver. See the codec-fwht.h header for more details.
215 :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
216 since the decoder can parse all the information from the raw bytestream.
217 * .. _V4L2-PIX-FMT-FWHT-STATELESS:
219 - ``V4L2_PIX_FMT_FWHT_STATELESS``
221 - Same format as V4L2_PIX_FMT_FWHT but requires stateless codec implementation.
222 Metadata associated with the frame to decode is required to be passed
223 through the ``V4L2_CID_STATELESS_FWHT_PARAMS`` control.
224 See the :ref:`associated Codec Control ID <codec-stateless-fwht>`.