| .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later |
| |
| .. _dvb_video: |
| |
| ####################### |
| Digital TV Video Device |
| ####################### |
| |
| The Digital TV video device controls the MPEG2 video decoder of the Digital |
| TV hardware. It can be accessed through **/dev/dvb/adapter0/video0**. Data |
| types and and ioctl definitions can be accessed by including |
| **linux/dvb/video.h** in your application. |
| |
| Note that the Digital TV video device only controls decoding of the MPEG video |
| stream, not its presentation on the TV or computer screen. On PCs this |
| is typically handled by an associated video4linux device, e.g. |
| **/dev/video**, which allows scaling and defining output windows. |
| |
| Some Digital TV cards don’t have their own MPEG decoder, which results in the |
| omission of the audio and video device as well as the video4linux |
| device. |
| |
| The ioctls that deal with SPUs (sub picture units) and navigation |
| packets are only supported on some MPEG decoders made for DVD playback. |
| |
| These ioctls were also used by V4L2 to control MPEG decoders implemented |
| in V4L2. The use of these ioctls for that purpose has been made obsolete |
| and proper V4L2 ioctls or controls have been created to replace that |
| functionality. |
| |
| |
| .. toctree:: |
| :maxdepth: 1 |
| |
| video_types |
| video_function_calls |
