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.. -*- coding: utf-8; mode: rst -*-
.. _VIDEO_TRY_COMMAND:
=================
VIDEO_TRY_COMMAND
=================
Name
----
VIDEO_TRY_COMMAND
Synopsis
--------
.. cpp:function:: int ioctl(int fd, int request = VIDEO_TRY_COMMAND, struct video_command *cmd)
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- int fd
- File descriptor returned by a previous call to open().
- .. row 2
- int request
- Equals VIDEO_TRY_COMMAND for this command.
- .. row 3
- struct video_command \*cmd
- Try a decoder command.
Description
-----------
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the
:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` ioctl.
This ioctl tries a decoder command. The ``video_command`` struct is a
subset of the ``v4l2_decoder_cmd`` struct, so refer to the
:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` documentation
for more information.
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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