media/v4l/format.rst

1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
34 The :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl is a major turning-point in the
38 assigns a logical stream (video data, VBI data etc.) exclusively to one
42 descriptor, can grab this stream or change device properties
46 descriptor owning the stream can make invalidating changes. Accordingly
59 Generally only one logical stream can be assigned to a file descriptor,
62 earlier versions of V4L2. Switching the logical stream or returning into
63 "panel mode" is possible by closing and reopening the device. Drivers
64 *may* support a switch using :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`.
66 All drivers exchanging data with applications must support the
88    Enumerating formats an application has no a-priori knowledge of