Lines Matching +full:audio +full:- +full:video

1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
7 Video Capture Interface
10 Video capture devices sample an analog video signal and store the
15 Conventionally V4L2 video capture devices are accessed through character
16 device special files named ``/dev/video`` and ``/dev/video0`` to
18 ``/dev/video`` is typically a symbolic link to the preferred video
21 .. note:: The same device file names are used for video output devices.
26 Devices supporting the video capture interface set the
31 functions they may also support the :ref:`video overlay <overlay>`
32 (``V4L2_CAP_VIDEO_OVERLAY``) and the :ref:`raw VBI capture <raw-vbi>`
34 streaming I/O methods must be supported. Tuners and audio inputs are
40 Video capture devices shall support :ref:`audio input <audio>`,
43 :ref:`streaming parameter <streaming-par>` ioctls as needed. The
44 :ref:`video input <video>` ioctls must be supported by all video
51 format parameters. The former select an area of the video picture to
91 details. Video capture devices must implement both the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`
99 A video capture device may support the :ref:`read() function <func-read>`
100 and/or streaming (:ref:`memory mapping <func-mmap>` or