DVBv5 Tools: Difference between revisions
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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. |
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. |
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Example: |
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$ dvbv5-scan ~/dvbc-test |
$ dvbv5-scan ~/dvbc-test |
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... |
... |
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New transponder/channel found: #39: 507000000 |
New transponder/channel found: #39: 507000000 |
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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: |
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[Globo] |
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SERVICE_ID = 5 |
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VIDEO_PID = 288 |
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AUDIO_PID = 289 |
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FREQUENCY = 573000000 |
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MODULATION = QAM/256 |
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INVERSION = OFF |
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SYMBOL_RATE = 5247500 |
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INNER_FEC = NONE |
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DELIVERY_SYSTEM = DVBC/ANNEX_A |
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There are several options that could be used on dvbv5-scan: |
There are several options that could be used on dvbv5-scan: |
Revision as of 18:20, 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:
[CHANNEL] DELIVERY_SYSTEM = DVBC/ANNEX_A FREQUENCY = 573000000 SYMBOL_RATE = 5217000 INNER_FEC = NONE MODULATION = QAM/256 INVERSION = AUTO
dvbv5-scan
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.
Example:
$ 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:
[Globo] SERVICE_ID = 5 VIDEO_PID = 288 AUDIO_PID = 289 FREQUENCY = 573000000 MODULATION = QAM/256 INVERSION = OFF SYMBOL_RATE = 5247500 INNER_FEC = NONE DELIVERY_SYSTEM = DVBC/ANNEX_A
There are several options that could be used on dvbv5-scan:
parameter | meaning |
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-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 |
-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 |