| Markus Heiser | 5377d91 | 2016-06-30 15:18:56 +0200 | [diff] [blame] | 1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | |
| 3 | .. _dvb_video: |
| 4 | |
| 5 | ################ |
| 6 | DVB Video Device |
| 7 | ################ |
| 8 | The DVB video device controls the MPEG2 video decoder of the DVB |
| 9 | hardware. It can be accessed through **/dev/dvb/adapter0/video0**. Data |
| 10 | types and and ioctl definitions can be accessed by including |
| 11 | **linux/dvb/video.h** in your application. |
| 12 | |
| 13 | Note that the DVB video device only controls decoding of the MPEG video |
| 14 | stream, not its presentation on the TV or computer screen. On PCs this |
| 15 | is typically handled by an associated video4linux device, e.g. |
| 16 | **/dev/video**, which allows scaling and defining output windows. |
| 17 | |
| 18 | Some DVB cards don’t have their own MPEG decoder, which results in the |
| 19 | omission of the audio and video device as well as the video4linux |
| 20 | device. |
| 21 | |
| 22 | The ioctls that deal with SPUs (sub picture units) and navigation |
| 23 | packets are only supported on some MPEG decoders made for DVD playback. |
| 24 | |
| 25 | These ioctls were also used by V4L2 to control MPEG decoders implemented |
| 26 | in V4L2. The use of these ioctls for that purpose has been made obsolete |
| 27 | and proper V4L2 ioctls or controls have been created to replace that |
| 28 | functionality. |
| 29 | |
| 30 | |
| 31 | .. toctree:: |
| 32 | :maxdepth: 1 |
| 33 | |
| 34 | video_types |
| 35 | video_function_calls |