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26 ``OUTPUT`` queue when :c:func:`VIDIOC_REQBUFS` or :c:func:`VIDIOC_CREATE_BUFS`
33 ``OUTPUT`` queue.
39 calls :c:func:`VIDIOC_ENUM_FMT` on the ``OUTPUT`` queue.
41 * The driver must always return the full set of supported ``OUTPUT`` formats,
52 active on the ``OUTPUT`` queue.
54 * Depending on the currently set ``OUTPUT`` format, the set of supported raw
65 4. Supported profiles and levels for the current ``OUTPUT`` format, if
72 1. Set the coded format on the ``OUTPUT`` queue via :c:func:`VIDIOC_S_FMT`.
77 a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
90 Changing the ``OUTPUT`` format may change the currently set ``CAPTURE``
92 ``OUTPUT`` format being set, including resolution, colorimetry
97 etc.) required by the ``OUTPUT`` format to enumerate the ``CAPTURE`` formats.
124 ``OUTPUT`` format, based on the hardware capabilities. It is suggested
131 alternative raw formats are supported for the current ``OUTPUT`` format and
137 ``OUTPUT`` format and currently set controls, even if more formats may be
143 as the ``OUTPUT`` format, :c:func:`VIDIOC_ENUM_FMT` may return a set of
170 ``OUTPUT`` queue.
178 a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
189 minimum of required number of ``OUTPUT`` buffers for the given format and
222 8. Allocate requests (likely one per ``OUTPUT`` buffer) via
225 9. Start streaming on both ``OUTPUT`` and ``CAPTURE`` queues via
235 configuration, as a buffer submitted to the ``OUTPUT`` queue. Typically, this
241 The amount of data and contents of the source ``OUTPUT`` buffer, as well as the
248 must set the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag on the ``OUTPUT``
251 request if the timestamp of the next ``OUTPUT`` buffer has not changed.
255 1. Queue an ``OUTPUT`` buffer containing one unit of encoded bytestream data for
282 frame, then the timestamps of all the ``OUTPUT`` buffers for a given
317 If the request is submitted without an ``OUTPUT`` buffer, or if some of the
320 ``OUTPUT`` buffer is queued, then it will return ``-EINVAL``.
326 frames were submitted to the ``OUTPUT`` queue).
348 its units of encoded data are successfully submitted to the ``OUTPUT`` queue.
384 In order to pause, the client can just cease queuing buffers onto the ``OUTPUT``
401 corresponding output buffers.
403 3. Call :c:func:`VIDIOC_STREAMOFF` on both the ``OUTPUT`` and ``CAPTURE``
410 ``OUTPUT`` buffers), with the new resolution set on the ``OUTPUT`` queue.