summaryrefslogtreecommitdiff
path: root/README.vps
diff options
context:
space:
mode:
authorKlaus Schmidinger <kls (at) cadsoft (dot) de>2006-04-23 18:00:00 +0200
committerKlaus Schmidinger <kls (at) cadsoft (dot) de>2006-04-23 18:00:00 +0200
commit880c3ddb94c09d6cca411363ed6f981d4e150fd2 (patch)
treec7f88180032f51938367727f145928528406c0c4 /README.vps
parent293ed4027ed3c3c8fd6ef1e8bdd79bfe69193957 (diff)
downloadvdr-patch-lnbsharing-880c3ddb94c09d6cca411363ed6f981d4e150fd2.tar.gz
vdr-patch-lnbsharing-880c3ddb94c09d6cca411363ed6f981d4e150fd2.tar.bz2
Version 1.3.48vdr-1.3.48
- Updated the GPL copies (thanks to Ville Skyttä). - Fixed several spelling errors (thanks to Ville Skyttä). - Updated the Polish OSD texts (thanks to Jaroslaw Swierczynski). - Updated the Finnish OSD texts (thanks to Rolf Ahrenberg). - Updated the French OSD texts (thanks to Pierre Briec). - Updated the Estonian OSD texts (thanks to Arthur Konovalov). - Updated the Romanian OSD texts (thanks to Lucian Muresan). - Updated the Danish OSD texts (thanks to Mogens Elneff). - Updated the Russian OSD texts (thanks to Oleg Roitburd). - Updated the Slovenian OSD texts (thanks to Matjaz Thaler). - Fixed wrong credits for the patch that was used to implement cPlugin::Active(). - Simplified the 'grep|awk|sed' command to retrieve the VDR/APIVERSION to a single 'sed' call. - Updated the Swedish OSD texts (thanks to Tomas Prybil). - Modified the German OSD texts to be "less technical" (thanks to Andreas Brachold). - Extended the version number reported with the '-V' option to also show the current APIVERSION (suggested by Thomas Günther). - Fixed handling empty titles in cEvent::FixEpgBugs() (reported by Rolf Ahrenberg). - Fixed some missing '-' in the German OSD texts (thanks to Walter Koch). - Added an error message about plugins that don't honor APIVERSION in their Makefile (based on a suggestion by Udo Richter). - Fixed a format string in recording.c to avoid a compiler warning on 64bit systems (thanks to Christian Wieninger for reporting, and Werner Schweer for pointing out that the 'z' modifier should be used here). - Ignoring k_Repeat when deciding whether the same key has been pressed in string input fields (based on a patch from Marko Mäkelä).
Diffstat (limited to 'README.vps')
-rw-r--r--README.vps137
1 files changed, 0 insertions, 137 deletions
diff --git a/README.vps b/README.vps
deleted file mode 100644
index ee8909e..0000000
--- a/README.vps
+++ /dev/null
@@ -1,137 +0,0 @@
-VPS (Video Programming Service)
-===============================
-
-Beginning with version 1.3.5 VDR supports the VPS method
-of identifying programmes to record, and making sure they
-are recorded in full length, even if they run longer than
-initially specified or are shifted in time.
-
-Of course, the main prerequisite for this to work is that
-the broadcasters actually provide the necessary data. In
-particular these are
-
-- EPG data (well, obviously)
-- the data for each event must contain the "Programme Identification Label"
- descriptor, which contains the VPS timestamp for this programme
-- the event data must provide and maintain the "Running Status" flag,
- which indicates whether this programme is currently running or not.
-
-Currently only the German "Öffentlich Rechtliche" tv stations provide
-the necessary VPS data, so this will work only for stations like "Das Erste",
-"ZDF" and the like.
-
-Following is a step by step description of what happens for a VPS controlled
-timer recording. First let's take a look at what the VDR user needs to do.
-
-VPS as seen by the VDR user:
-----------------------------
-
-When the VDR user sets up a timer that shall be under VPS control, there
-are only two things that need to be done:
-
-1. Set the "Start" time to the actual VPS time as published in tv magazines.
- Typically the VPS time is the same as the printed start time, unless
- expliciltly specified otherwise. For instance, a tv magazine might print
-
- 20:15 Wetten, dass...?
- (VPS = 20:14)
-
- In this case the timer would need to be set to 20:14.
-
-2. Set the "VPS" flag in the timer definition to "yes" in order to tell VDR
- that this timer is to be handled under VPS control. This is no different
- to old analog video recorders, where each timer has also had a separate
- VPS flag.
-
-If the user sets up a timer from the "Schedule" menu, things are even simpler.
-If the setup option "Recording/Use VPS" is set to "yes", any timer that is
-programmed from an event that has VPS information will automatically be set
-up as a VPS timer.
-
-IMPORTANT: In order for a recording to work under VPS control it is of
-========== paramount importance that the start time is set to the actual
- VPS time of that event, NOT some time a few minutes before the
- event starts! If a timer is set to use VPS, and the time doesn't
- match any event's VPS time, nothing will be recorded!
-
-VPS as seen by VDR:
--------------------
-
-The following things happen when VDR processes timers:
-
-- VDR regularly scans the EPG data and assigns events to the timers (see
- cTimers::SetEvents() in VDR/timers.c).
- This can be seen in the log file as
-
- timer 1 (15 1830-1900 'Neues') set to event 28.02.2004 18:30-18:59 (VPS: 28.02 18:30) 'neues'
-
-- When a VPS timer is asked whether it matches (i.e. whether a recording shall
- be started), it checks whether it has an event assigned to it, and whether
- that event has a running status of "starts in a few seconds" or "running"
- (see cTimer::Matches(time_t t, bool Directly) in VDR/timers.c). This allows
- the recording process to catch the entire programme, even if it runs longer
- than initially advertised. It also works if it runs shorter or gets shifted.
-
-- When a VPS timer event is coming up (i.e. there are only a few minutes until
- it starts, according to the related event data's start time - which may be
- different than the VPS time!), VDR tunes a free DVB device to that transponder
- (unless there is already a device tuned to that one) in order to make sure
- that the event data (especially the "Running Status") will be up to date and
- a change in the "Running status" flag will be seen immediately. This may
- lead to the primary device being switched to a different channel if there
- is no other free DVB device available. See the main program loop in VDR/vdr.c,
- "Make sure VPS timers "see" their channel early enough:".
-
-Problems:
----------
-
-- In order for a VPS controlled timer to function properly, it needs to "see"
- any changes in the running status of its event. This means that one of the
- DVB devices needs to be tuned to the proper transponder some time before
- the actual start time of the event. However, this may result in an other
- timer (with lower priority) to be stopped, because it occupies the DVB device
- and has it tuned to a different transponder.
- See "// Make sure VPS timers "see" their channel early enough:" in VDR/vdr.c.
-TODO:
- Something needs to be done to prevent two timers from repeatedly switching
- the device between channels in such a situation.
-
-- If, for some reason, the driver doesn't deliver any more section data, a
- VPS controlled timer will never see that the programme has started (or ended).
-TODO:
- Therefore some mechanism needs to be implemented that makes absolutely sure
- we continuously receive at least the event data for the present event.
-
-Caveats:
---------
-
-Apparently VPS in digital broadcasting is still in an early state. Only few
-tv stations actually support it, and other tv stations don't even handle the
-"Running Status" correctly (which, by itself, would already be helpful, even
-without VPS).
-
-Here's a list of things that are apparently done wrong by the individual
-stations:
-
-- The German "Öffentlich Rechtliche" tv stations, although supporting VPS,
- don't switch the "Running Status" of an upcoming broadcast to "starts in
- a few seconds", but rather go directly from "unknown" or "not running" to
- "running". This may result in a recording that misses the first few seconds
- of the programme.
-- The RTL group handles EPG events in a rather random way. They change event
- IDs randomly, and switch the "Running Status" flag at times that are only
- losely related to the actual events. For instance, if the "RTL aktuell"
- programme starts at 18:45, they switch that event to "running" at about
- 18:43. Or, even worse, if "Wer wird Millionär?" runs until 21:15, they
- switch the _next_ programme to running (which implicitly set "Wer wird
- Millionär?" to "not running) at around 21:11 - so anybody using that
- information to control recording would not see the end of that programme.
-
-... more following as it comes up...
-
-Contact:
---------
-
-ARD Digital: http://www.ard-digital.de/home/index.php?id=16&languageid=1
-ZDF vision: http://www.zdf.de/ZDFde/inhalt/1/0,1872,1021601,00.html (select "zdfvision")
- phone: 06131/706754