1*4882a593Smuzhiyun.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2*4882a593Smuzhiyun 3*4882a593Smuzhiyun.. _dvb_video: 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun####################### 6*4882a593SmuzhiyunDigital TV Video Device 7*4882a593Smuzhiyun####################### 8*4882a593Smuzhiyun 9*4882a593SmuzhiyunThe Digital TV video device controls the MPEG2 video decoder of the Digital 10*4882a593SmuzhiyunTV hardware. It can be accessed through **/dev/dvb/adapter0/video0**. Data 11*4882a593Smuzhiyuntypes and and ioctl definitions can be accessed by including 12*4882a593Smuzhiyun**linux/dvb/video.h** in your application. 13*4882a593Smuzhiyun 14*4882a593SmuzhiyunNote that the Digital TV video device only controls decoding of the MPEG video 15*4882a593Smuzhiyunstream, not its presentation on the TV or computer screen. On PCs this 16*4882a593Smuzhiyunis typically handled by an associated video4linux device, e.g. 17*4882a593Smuzhiyun**/dev/video**, which allows scaling and defining output windows. 18*4882a593Smuzhiyun 19*4882a593SmuzhiyunSome Digital TV cards don’t have their own MPEG decoder, which results in the 20*4882a593Smuzhiyunomission of the audio and video device as well as the video4linux 21*4882a593Smuzhiyundevice. 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunThe ioctls that deal with SPUs (sub picture units) and navigation 24*4882a593Smuzhiyunpackets are only supported on some MPEG decoders made for DVD playback. 25*4882a593Smuzhiyun 26*4882a593SmuzhiyunThese ioctls were also used by V4L2 to control MPEG decoders implemented 27*4882a593Smuzhiyunin V4L2. The use of these ioctls for that purpose has been made obsolete 28*4882a593Smuzhiyunand proper V4L2 ioctls or controls have been created to replace that 29*4882a593Smuzhiyunfunctionality. 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun.. toctree:: 33*4882a593Smuzhiyun :maxdepth: 1 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun video_types 36*4882a593Smuzhiyun video_function_calls 37