video-slowmotion.rst

.. -*- coding: utf-8; mode: rst -*-

.. _VIDEO_SLOWMOTION:

================
VIDEO_SLOWMOTION
================

NAME
----

VIDEO_SLOWMOTION

SYNOPSIS
--------

.. c:function:: int ioctl(fd, int request = VIDEO_SLOWMOTION, int nFrames)


ARGUMENTS
---------

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       -  int fd

       -  File descriptor returned by a previous call to open().

    -  .. row 2

       -  int request

       -  Equals VIDEO_SLOWMOTION for this command.

    -  .. row 3

       -  int nFrames

       -  The number of times to repeat each frame.


DESCRIPTION
-----------

This ioctl call asks the video device to repeat decoding frames N number
of times. This call can only be used if VIDEO_SOURCE_MEMORY is
selected.


RETURN VALUE
------------

On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.



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       -  ``EPERM``

       -  Mode VIDEO_SOURCE_MEMORY not selected.