tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1.. -*- coding: utf-8; mode: rst -*-
2
3.. _dvb_video:
4
5################
6DVB Video Device
7################
8The DVB video device controls the MPEG2 video decoder of the DVB
9hardware. It can be accessed through **/dev/dvb/adapter0/video0**. Data
10types and and ioctl definitions can be accessed by including
11**linux/dvb/video.h** in your application.
12
13Note that the DVB video device only controls decoding of the MPEG video
14stream, not its presentation on the TV or computer screen. On PCs this
15is typically handled by an associated video4linux device, e.g.
16**/dev/video**, which allows scaling and defining output windows.
17
18Some DVB cards don’t have their own MPEG decoder, which results in the
19omission of the audio and video device as well as the video4linux
20device.
21
22The ioctls that deal with SPUs (sub picture units) and navigation
23packets are only supported on some MPEG decoders made for DVD playback.
24
25These ioctls were also used by V4L2 to control MPEG decoders implemented
26in V4L2. The use of these ioctls for that purpose has been made obsolete
27and proper V4L2 ioctls or controls have been created to replace that
28functionality.
29
30
31.. toctree::
32 :maxdepth: 1
33
34 video_types
35 video_function_calls