DVBv5 Tools: Difference between revisions

Revision as of 19:16, 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

@@ Line 20: / Line 20: @@
  	MODULATION = QAM/256
  	INVERSION = AUTO
-== dvbv5-zap ==
-The dvbv5-zap tool can be used on several different modes, depending on the parameters used.
-The typical use is to tune into a channel and put it into record mode:
- $ dvbv5-zap -c dvb_channel.conf "trilhas sonoras" -r
- using demux '/dev/dvb/adapter0/demux0'
- reading channels from file 'dvb_channel.conf'
- service has pid type 05:  204
- tuning to 573000000 Hz
- audio pid 104
-   dvb_set_pesfilter 104
- Lock   (0x1f) Quality= Good Signal= 100.00% C/N= -13.80dB UCB= 70 postBER= 3.14x10^-3 PER= 0
- DVR interface '/dev/dvb/adapter0/dvr0' can now be opened
-The channel can be watched by playing the contents of the DVR interface, with some player that recognizes the MPEG-TS format.
-For example (in this specific case, it is an audio only channel, but the same could be used for audio/video):
- $ mplayer -cache 800 /dev/dvb/adapter0/dvr0
- MPlayer SVN-r37077-4.8.2 (C) 2000-2014 MPlayer Team
- TS file format detected.
- NO VIDEO! AUDIO MPA(pid=104) NO SUBS (yet)!  PROGRAM N. 0
- ==================================================================
- Opening audio decoder: [mpg123] MPEG 1.0/2.0/2.5 layers I, II, III
- AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
- Selected audio codec: [mpg123] afm: mpg123 (MPEG 1.0/2.0/2.5 layers I, II, III)
- ==================================================================
- AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
- Video: no video
- Starting playback...
-The dvbv5-zap tool can also be used to monitor a DVB channel:
- $ dvbv5-zap -c dvb_channel.conf 573000000 -m
- using demux '/dev/dvb/adapter0/demux0'
- reading channels from file 'dvb_channel.conf'
- service has pid type 05:  204
- tuning to 573000000 Hz
- Lock   (0x1f) Quality= Good Signal= 100.00% C/N= -13.90dB UCB= 384 postBER= 96.8x10^-6 PER= 0
-   dvb_set_pesfilter to 0x2000
- {|
- !PID
- !FREQ
- !SPEED
- !TOTAL
- |-
- | 0000 || 9.88 p/s || 14.5 Kbps || 1 KB
- |-
- | 0001 || 1.98 p/s || 2.9 Kbps || 376 B
- |-
- | 0010 || 18.77 p/s || 27.6 Kbps || 3 KB
- |-
- | 0011 || 48.42 p/s || 71.1 Kbps || 8 KB
- |-
- | 0012 || 1455.53 p/s || 2137.8 Kbps || 270 KB
- |-
- | ...
- |-
- | 1fff || 1033.60 p/s || 1518.1 Kbps || 192 KB
- |-
- | TOT || 25296.44 p/s || 37154.2 Kbps || 4700 KB
- |}
- Lock   (0x1f) Quality= Good Signal= 100.00% C/N= -13.90dB UCB= 384 postBER= 96.8x10^-6 PER= 0
-== dvb-fe-tool ==
-== dvb-format-covert ==
 [[Category:Software]][[Category:Apps & Utilities]]

DVBv5 Tools: Difference between revisions

Revision as of 19:16, 12 September 2014

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