media/v4l/dev-encoder.rst

90    * The full set of supported formats will be returned, regardless of the
97      will be returned.
108      format will include all possible coded resolutions supported by the
112      will include all possible frame buffer resolutions supported by the
123      format and coded resolution will include all possible frame intervals
127      format and resolution will include all possible frame intervals supported
228    * Setting the ``OUTPUT`` format will reset the selection rectangles to their
257       to 1/24 (or 24 frames per second) will produce a coded video stream
435    restarts it again, the encoder will begin generating a stream independent
493    will have their ``timestamp`` field set to the same value when dequeued.
499      ``OUTPUT`` timestamp will be copied to multiple ``CAPTURE`` buffers,
503      ``CAPTURE`` timestamps will not retain the order of ``OUTPUT`` timestamps.
509    ``CAPTURE`` buffers will have corresponding flag bits set in their
514 Should an encoding error occur, it will be reported to the client with the level
518   operation will be returned with the ``V4L2_BUF_FLAG_ERROR`` flag set,
521   the error, such buffer(s) will be returned with the ``V4L2_BUF_FLAG_ERROR`` flag
532 further operations on corresponding encoder file handle will return the -EIO
582       :c:func:`VIDIOC_ENCODER_CMD` will not fail even if any of the queues is
583       not streaming, but at the same time it will not initiate the `Drain`
587    :c:func:`VIDIOC_ENCODER_CMD` was issued will be processed and encoded as
603         marked with ``V4L2_BUF_FLAG_LAST`` will result in a -EPIPE error from
613       For backwards compatibility, the encoder will signal a ``V4L2_EVENT_EOS``
620    and it will accept, but not process any newly queued ``OUTPUT`` buffers
623    * ``V4L2_ENC_CMD_START`` - the encoder will not be reset and will resume
627      ``CAPTURE`` queue - the encoder will be reset (see the `Reset` sequence)
631      ``OUTPUT`` queue - the encoder will resume operation normally, however any
633      and :c:func:`VIDIOC_STREAMOFF` will be discarded.
642    will fail with -EBUSY error code if attempted.
662      next ``CAPTURE`` buffer will be returned empty with the
687    will return all currently queued ``CAPTURE`` buffers to the client, without
692    ``CAPTURE`` buffers from now on will contain a standalone stream that can be
717    will result in the encoder adjusting the requested ``OUTPUT`` format to a
724    the client must not change the format on the ``CAPTURE`` queue. Drivers will