Difference between revisions of "DVBv5 Tools"

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Dual LO, Bandstacking, LO POL_R 11250 MHZ, LO POL_L 14350 MHz
Dual LO, Bandstacking, LO POL_R 11250 MHZ, LO POL_L 14350 MHz
== dvbv5-zap ==
== dvb-fe-tool ==
== dvb-format-covert ==

Revision as of 18:37, 12 September 2014

DVBv5 Tools (not to be confused with the similarly named, but much older, DVB tools legacy project) is a small set of command line utilities that was developed to be compliant with the newer features provided by version 5 of the DVB API.[1] The tools should also be backward compatible with the older v3 DVB API.

This DVB toolset suite resides in the v4l-utils git repository, and uses libdvbv5.

It is composed of 4 tools::

  • dvbv5-scan - Scans the channel transponders and gets the services available there;
  • dvbv5-zap - Locks into a channel (zap), allowing other applications to get the stream at the dvr devices or to monitor the stream;
  • dvb-fe-tool - Lists frontend properties and allow to manually set the DVB frontend
  • dvb-format-convert - Converts from/to other formats used by DVBv3 apps into the dvbv5 format.

The DVBv5 file format is formed by a channel name, followed by a series of key/value properties.

For example, this is a channel file with one DVB-C channel on it:

	FREQUENCY = 573000000
	SYMBOL_RATE = 5217000


A single physical channel (also called as transponder) may have several virtual channels inside it, encapsulated via a MPEG Transport stream.

Those virtual channels are called as "service" at the MPEG-TS terminology, and may have one or more audio, video and other types of elements inside it.

The dvbv5-scan goal is to scan for a list of physical channels/transponders and identify there the MPEG-TS services available.

The dvbv5-scan tool is smart enough to retrieve the information at the MPEG-TS Network Information Table (NIT) about other channels available on the stream.


$ dvbv5-scan ~/dvbc-test
Scanning frequency #1 573000000
Lock   (0x1f) Quality= Good Signal= 100.00% C/N= -13.80dB UCB= 0 postBER= 3.14x10^-3 PER= 0
Service SBT, provider (null): digital television
Service Globo, provider Globo: digital television
Service Record, provider (null): digital television
Service Band, provider (null): digital television
Service Trilhas Sonoras, provider (null): digital radio
New transponder/channel found: #2: 579000000
New transponder/channel found: #39: 507000000

The scan process will then scan the other 38 discovered new transponders, and generate a dvb_channel.com with several entries with will have not only the physical channel/transponder info, but also the Service ID, and the corresponding audio/video/other program IDs (PID), like:

	VIDEO_PID = 288
	AUDIO_PID = 289
	FREQUENCY = 573000000
	SYMBOL_RATE = 5247500

There are several options that could be used on dvbv5-scan:

dvbv5-scan parameters
parameter meaning
-3, --dvbv3 Use DVBv3 only
-a, --adapter=adapter# use given adapter (default 0)
-d, --demux=demux# use given demux (default 0)
-f, --frontend=frontend# use given frontend (default 0)
-F, --file-freqs-only don't use the other frequencies discovered during scan
-G, --get_frontend use data from get_frontend on the output file
-I, --input-format=format Input format: CHANNEL, DVBV5 (default: DVBV5). The input format is case insensitive
-l, --lnbf=LNBf_type type of LNBf to use. 'help' lists the available ones. The LNBf model is case insensitive
-N, --nit use data from NIT table on the output file
-o, --output=file output filename (default: dvb_channel.conf)
-O, --output-format=format Output format: CHANNEL, ZAP, DVBV5 (default: DVBV5). The output format is case insensitive
-p, --parse-other-nit Parse the other NIT/SDT tables
-S, --sat_number=satellite_number satellite number. If not specified, disable DISEqC
-T, --timeout-multiply=factor Multiply scan timeouts by this factor
-U, --freq_bpf=frequency SCR/Unicable band-pass filter frequency to use, in kHz
-v, --verbose be (very) verbose
-w, --lna=LNA (0, 1, -1) enable/disable/auto LNA power
-W, --wait=time adds additional wait time for DISEqC command completion
-?, --help help
--usage Give a short usage message
-V, --version Print program version

Please notice that, for Satellite systems, the LNBf and other corresponding settings are needed. the supported LNBf models by dvbv5-scan and dvbv5-zap are:

	10800 to 11800 MHz and 11600 to 12700 MHz
	Dual LO, IF = lowband 9750 MHz, highband 10600 MHz

	Expressvu, North America
	12200 to 12700 MHz
	Single LO, IF = 11250 MHz

	Astra 1E, European Universal Ku (extended)
	10700 to 11700 MHz and 11700 to 12750 MHz
	Dual LO, IF = lowband 9750 MHz, highband 10600 MHz

	10945 to 11450 MHz
	Single LO, IF = 10000 MHz

	10700 to 11700 MHz
	Single LO, IF = 9750 MHz

	Big Dish - Monopoint LNBf
	3700 to 4200 MHz
	Single LO, IF = 5150 MHz

	Big Dish - Multipoint LNBf
	3700 to 4200 MHz
	Dual LO, Bandstacking, LO POL_R 5150 MHZ, LO POL_L 5750 MHz

	DishPro LNBf
	12200 to 12700 MHz
	Dual LO, Bandstacking, LO POL_R 11250 MHZ, LO POL_L 14350 MHz