1 .. SPDX-License-Identifier: GPL-2.0
2
3 FAQ
4 ===
5
6 .. note::
7
8 1. With Digital TV, a single physical cha
9 contents inside it. The specs call eac
10 This is what a TV user would call "cha
11 avoid confusion, we're calling *transp
12 channel on this FAQ, and *services* fo
13 2. The LinuxTV community maintains some W
14 a lot of information related to the me
15 don't find an answer for your needs he
16 you'll be able to get something useful
17 at:
18
19 https://www.linuxtv.org/wiki/
20
21 Some very frequently asked questions about Lin
22
23 1. The signal seems to die a few seconds after
24
25 It's not a bug, it's a feature. Becaus
26 significant power requirements (and he
27 are powered down if they are unused (i
28 is closed). The ``dvb-core`` module pa
29 allow you to change the timeout (defau
30 timeout to 0 disables the timeout feat
31
32 2. How can I watch TV?
33
34 Together with the Linux Kernel, the Di
35 some simple utilities which are mainly
36 and to demonstrate how the DVB API wor
37 tools and are grouped together with th
38
39 https://git.linuxtv.org/v4l-utils.
40
41 You can find more information at the L
42
43 https://www.linuxtv.org/wiki/index
44
45 The first step is to get a list of ser
46
47 This is done by using several existing
48 for example the ``dvbv5-scan`` tool. Y
49 about it at:
50
51 https://www.linuxtv.org/wiki/index
52
53 There are some other applications like
54 blind scan, trying hard to find all po
55 those consumes a large amount of time
56
57 .. [#] https://www.linuxtv.org/wiki/in
58
59 Also, some applications like ``kaffein
60 to scan for services. So, you don't ne
61 application to obtain such list.
62
63 Most of such tools need a file contain
64 transponders available on your area. S
65 maintain tables of Digital TV channel
66 patches from the community to keep the
67
68 This list is hosted at:
69
70 https://git.linuxtv.org/dtv-scan-t
71
72 And packaged on several distributions.
73
74 Kaffeine has some blind scan support f
75 It also relies on DTV scan tables, alt
76 of it internally (and, if requested by
77 newer versions of it).
78
79 If you are lucky you can just use one
80 transponders. If not, you may need to
81 the Internet and create a new file. Th
82 contains physical channel lists. For c
83 knowing how to tune into a single chan
84 scanning tool to identify the other ch
85 this could also work for terrestrial t
86
87 Once you have a transponders list, you
88 list with a tool like ``dvbv5-scan``.
89
90 Almost all modern Digital TV cards don
91 MPEG-decoders. So, it is up to the app
92 stream provided by the board, split it
93 data and decode.
94
95 3. Which Digital TV applications exist?
96
97 Several media player applications are
98 digital TV channels, including Kaffein
99
100 Kaffeine aims to be very user-friendly
101 by one of the Kernel driver developers
102
103 A comprehensive list of those and othe
104
105 https://www.linuxtv.org/wiki/index
106
107 Some of the most popular ones are link
108
109 https://kde.org/applications/multimedi
110 KDE media player, focused on D
111
112 https://www.linuxtv.org/vdrwiki/index.
113 Klaus Schmidinger's Video Disk
114
115 https://linuxtv.org/downloads and http
116 Digital TV and other media-rel
117 Kernel drivers. The ``v4l-util
118 several swiss knife tools for
119
120 http://sourceforge.net/projects/dvbtoo
121 Dave Chapman's dvbtools packag
122 dvbstream and dvbtune
123
124 http://www.dbox2.info/
125 LinuxDVB on the dBox2
126
127 http://www.tuxbox.org/
128 the TuxBox CVS many interestin
129 DVB source
130
131 http://www.nenie.org/misc/mpsys/
132 MPSYS: a MPEG2 system library
133
134 https://www.videolan.org/vlc/index.pt.
135 Vlc
136
137 http://mplayerhq.hu/
138 MPlayer
139
140 http://xine.sourceforge.net/ and http:
141 Xine
142
143 http://www.mythtv.org/
144 MythTV - analog TV and digital
145
146 http://dvbsnoop.sourceforge.net/
147 DVB sniffer program to monitor
148 or view dvb/mpeg/dsm-cc/mhp st
149 PES, SECTION)
150
151 4. Can't get a signal tuned correctly
152
153 That could be due to a lot of problems
154 usually TV cards need stronger signals
155 sensitive to noise. So, perhaps you ju
156 cabling. Yet, it could also be some ha
157
158 For example, if you are using a Techno
159 *without* analog module, you might hav
160 adac=-1 (dvb-ttpci.o).
161
162 Please see the FAQ page at linuxtv.org
163 valuable information:
164
165 https://www.linuxtv.org/wiki/index
166
167 If that doesn't work, check at the lin
168 see if someone else had a similar prob
169 and/or digital TV service provider:
170
171 https://lore.kernel.org/linux-medi
172
173 If none of this works, you can try sen
174 linux-media ML and see if someone else
175 The e-mail is linux-media AT vger.kern
176
177 5. The dvb_net device doesn't give me any pack
178
179 Run ``tcpdump`` on the ``dvb0_0`` inte
180 into promiscuous mode so it accepts an
181 you have configured with the ``dvbnet`
182 are any packets with the IP addr and M
183 configured with ``ifconfig`` or with `
184
185 If ``tcpdump`` doesn't give you any ou
186 which ``ifconfig`` or ``netstat -ni``
187 address is wrong, ``dvb_net`` won't ge
188 run ``tcpdump`` before checking the st
189 packets at all then maybe the PID is w
190 then either the PID is wrong or the st
191 the MPE standard (EN 301 192, http://w
192 use e.g. ``dvbsnoop`` for debugging.
193
194 6. The ``dvb_net`` device doesn't give me any
195
196 Check your routes if they include the
197 Additionally make sure that "source va
198 lookup" is disabled::
199
200 $ "echo 0 > /proc/sys/net/ipv4/conf/
201
202 7. What are all those modules that need to be
203
204 In order to make it more flexible and
205 combinations, the media subsystem is w
206
207 So, besides the Digital TV hardware mo
208 it also needs to load a frontend drive
209 core. If the board also has remote con
210 need the remote controller core and th
211 The same happens if the board has supp
212 core support for video4linux need to b
213
214 The actual module names are Linux-kern
215 from time to time, things change, in o
216 support more flexible.
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