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+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_SET_FORMAT:
+
+================
+VIDEO_SET_FORMAT
+================
+
+Name
+----
+
+VIDEO_SET_FORMAT
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_SET_FORMAT
+
+``int ioctl(fd, VIDEO_SET_FORMAT, video_format_t format)``
+
+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_SET_FORMAT for this command.
+
+    -  .. row 3
+
+       -  video_format_t format
+
+       -  video format of TV as defined in section ??.
+
+Description
+-----------
+
+This ioctl sets the screen format (aspect ratio) of the connected output
+device (TV) so that the output of the decoder can be adjusted
+accordingly.
+
+.. c:type:: video_format_t
+
+.. code-block:: c
+
+	typedef enum {
+		VIDEO_FORMAT_4_3,     /* Select 4:3 format */
+		VIDEO_FORMAT_16_9,    /* Select 16:9 format. */
+		VIDEO_FORMAT_221_1    /* 2.21:1 */
+	} video_format_t;
+
+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.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EINVAL``
+
+       -  format is not a valid video format.