Section: User Commands (1)
zvbi-atsc-cc - ATSC Closed Caption decoder
zvbi-atsc-cc [ options ] [-n] station name
captures ATSC TV transmissions using a Linux DVB device and decodes
the enclosed Closed Caption data. It can record both NTSC caption
(EIA 608-B) and DTVCC caption (CEA 708-C).
- -? -h --help --usage
Print a short usage message.
- -q --quiet
Suppress all progress and error messages.
- -v --verbose
- -a number
- --adapter-num number
Select a different DVB device to capture the signal
(/dev/dvb/adapterN). The default is adapter 0.
- -i number
- --frontend-id number
Select a different frontend on the DVB device
(/dev/dvb/adapterN/frontendM). Most devices have only one frontend.
The default is frontend 0.
- -d number
- --demux-id number
Select a different demultiplexer on the DVB device
(/dev/dvb/adapterN/demuxM). Most devices have only one demultiplexer.
The default is demultiplexer 0.
- -r number
- --dvr-id number
Select a different DVR interface on the DVB device
(/dev/dvb/adapterN/dvrM). Most devices have only one DVR interface.
The default is DVR interface 0.
Decode an MPEG-2 Transport Stream on standard input instead of opening
a DVB device. This option is mainly intended for debugging.
Since Transport Streams can contain multiple programs you must still
specify one or more station names, which
will look up in a channel configuration file to determine the Program ID
of the video elementary stream or streams it should extract. You should
also add the
option to clarify that this is an ATSC TS and the program should expect
channel configuration file, which is otherwise inferred from the DVB
- -e file name
- --channel-conf file name
To tune in a TV station
needs a channel configuration file. We use the config file of the
tuning tool from the linuxtv-dvb-apps package. You can create
it with the
tool from the same package.
The azap channel configuration file is a text file which
lists one station per line. Each line contains six fields separated
by a colon: The station name, the transponder frequency in Hz,
the modulation used (8VSB, 16VSB, QAM_64, QAM_256), the video stream
PID, the audio stream PID, and the service ID. Empty lines and
lines starting with a number sign will be ignored.
This option selects a different channel configuration file.
The default is
- -L --list
List all stations in the channel configuration file and their
- -n station name
- --station station name
The station to tune in. Usually the -n can be omitted.
can record caption from multiple stations at once if they share a
transponder frequency. Just specify multiple station names on
the command line to enable this.
With the caption and XDS options you specify which data
should extract. If multiple station names are given these
options apply to the succeeding station name. You must
specify at least one of these options for each station.
- -c --cc
Print any received caption on standard output.
- -C file name
- --cc-file file name
Append any received caption to the specified file.
- -l number
- --channel number
Print NTSC Closed Caption channel 1, 2, 3 or 4 on standard
- -1 ... -4 file name
- --cc1-file ... --cc4-file file name
Filter out NTSC Closed Caption channel CC1 ... CC4 and append the text
to the specified file. CC1 is the primary, CC3 the secondary caption
service. If both services are transmitted CC1 usually carries English,
CC3 Spanish caption.
- -5 ... -8 file name
- --t1-file ... --t4-file file name
Filter out NTSC Text service T1 ... T4 and append the text to the
- -9 ... -0 file name
- --s1-file ... --s2-file file name
Filter out DTVCC service 1 or 2 and append the text to the specified
file. Service 1 is the primary, service 2 the secondary caption
service. If both services are transmitted service 1 usually carries
English, service 2 Spanish caption.
Digital TV stations are supposed to transmit language codes and other
information about the available caption services but these are not
filters out text which does not appear to be caption, such as tickers
or vertically printed text.
- -b --no-webtv
Do not print WebTV links.
- -m --timestamps
Prepend timestamps (YYYYMMDDHHMMSS) to caption lines.
- -s --sentences
Print caption one sentence at a time.
- -j type
- --format type
When type is "plain"
prints caption and XDS text without any markup. When type is "vt100"
it faithfully reproduces the caption foreground and background
color, italic and underline attributes by inserting VT.100 terminal
control codes. With type "ntsc-cc" it mimics the output of the
tool. The default is "ntsc-cc".
zvbi-atsc-cc supports all Closed Caption character sets and
converts to the encoding of the current locale, usually UTF-8.
- -p --plain
Same as -j plain
- -x --xds
Print all received XDS data on standard output.
- -X file name
- --xds-file file name
Filter out eXtended Data Service data (station name, program name,
program rating etc.) and append it as text to the specified file.
- -f type[,type]*
- --filter type[,type]*
Filter out specific XDS information: all, call (station call sign),
desc (program synopsis), length, network, rating, time, timecode,
timezone, title. Multiple -f options accumulate. The default
zvbi-atsc-cc -c NJN-HD
zvbi-atsc-cc --cc1-file wnyw.txt WNYW-DT --cc1-file wwor.txt WWOR-DT
(NJN-HD, WNYW-DT and WWOR-DT are TV stations in New York. WNYW-DT
and WWOR-DT can be captured simultaneously because they share a
Michael H. Schimek (mschimek AT users.sourceforge.net)
Mark K. Kim
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.