1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2
3.. _dvb_video:
4
5#######################
6Digital TV Video Device
7#######################
8
9The Digital TV video device controls the MPEG2 video decoder of the Digital
10TV hardware. It can be accessed through **/dev/dvb/adapter0/video0**. Data
11types and ioctl definitions can be accessed by including
12**linux/dvb/video.h** in your application.
13
14Note that the Digital TV video device only controls decoding of the MPEG video
15stream, not its presentation on the TV or computer screen. On PCs this
16is typically handled by an associated video4linux device, e.g.
17**/dev/video**, which allows scaling and defining output windows.
18
19Some Digital TV cards don't have their own MPEG decoder, which results in the
20omission of the audio and video device as well as the video4linux
21device.
22
23The ioctls that deal with SPUs (sub picture units) and navigation
24packets are only supported on some MPEG decoders made for DVD playback.
25
26These ioctls were also used by V4L2 to control MPEG decoders implemented
27in V4L2. The use of these ioctls for that purpose has been made obsolete
28and proper V4L2 ioctls or controls have been created to replace that
29functionality.
30
31
32.. toctree::
33    :maxdepth: 1
34
35    video_types
36    video_function_calls
37