| .. 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 |