0001 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
0002
0003 .. _dvb_video:
0004
0005 #######################
0006 Digital TV Video Device
0007 #######################
0008
0009 The Digital TV video device controls the MPEG2 video decoder of the Digital
0010 TV hardware. It can be accessed through **/dev/dvb/adapter0/video0**. Data
0011 types and ioctl definitions can be accessed by including
0012 **linux/dvb/video.h** in your application.
0013
0014 Note that the Digital TV video device only controls decoding of the MPEG video
0015 stream, not its presentation on the TV or computer screen. On PCs this
0016 is typically handled by an associated video4linux device, e.g.
0017 **/dev/video**, which allows scaling and defining output windows.
0018
0019 Some Digital TV cards don't have their own MPEG decoder, which results in the
0020 omission of the audio and video device as well as the video4linux
0021 device.
0022
0023 The ioctls that deal with SPUs (sub picture units) and navigation
0024 packets are only supported on some MPEG decoders made for DVD playback.
0025
0026 These ioctls were also used by V4L2 to control MPEG decoders implemented
0027 in V4L2. The use of these ioctls for that purpose has been made obsolete
0028 and proper V4L2 ioctls or controls have been created to replace that
0029 functionality.
0030
0031
0032 .. toctree::
0033 :maxdepth: 1
0034
0035 video_types
0036 video_function_calls
