FWCTL(8) System Manager's Manual FWCTL(8)
fwctl -- IEEE1394 control utility
fwctl [-prt] [-b pri_req] [-c node] [-d node] [-g gap_count] [-l file]
[-M mode] [-m EUI64 | hostname] [-o node] [-R filename]
[-S filename] [-s node] [-u bus_num]
The fwctl utility is designed to provide a way for users to access and
control the NetBSD IEEE1394 subsystem. Without options, fwctl will
output a list of devices that are/were connected to the bus.
The following options are available:
-b pri_req Set the PRIORITY_BUDGET register on all
-c node Show the configuration ROM on the node.
-d node Hex dump of the configuration ROM.
-f node Force specified node to be the root node on
the next bus reset by sending a PHY config
packet. Valid values are 0 - 63.
-g gap_count Broadcast new gap_count by phy_config packet.
By default this value is 63 on all nodes.
Valid values are 0 - 63.
-i pri_req Set the PRIORITY_BUDGET register on all
-l file Load hex dump file of the configuration ROM
and parse it.
-M mode Explicitly specify either dv or mpeg mode for
the incoming stream. Only meaningful in case
of and must precede the -R option. If not
specified, the program will try to guess. In
case of ``format 0x20'' error, try to force
the mpeg mode.
-m EUI64 | hostname Set default fwmem target. Hostname will be
converted to EUI64.
-o node Send a link-on PHY packet to the node.
-p Dump PHY registers.
-R filename Receive DV or MPEG TS stream and dump it to a
file. Use Ctrl-C to stop receiving. Some DV
cameras seem not to send the stream if a bus
manager exits. If you cannot get the stream,
try the following commands:
The resulting file contains raw DV data
excluding isochronous header and CIP header.
It can be handled by the
pkgsrc/multimedia/libdv package. The
resulting MPEG TS stream can be played and
sent over a network using the VideoLAN tool
(pkgsrc/multimedia/vlc). The stream can be
piped directly to vlc, see EXAMPLES.
-r Initiate bus reset.
-S filename Send a DV file as isochronous stream.
-s node Write to the RESET_START register on the node.
-t Show the topology map.
-u bus_num Specify the IEEE1394 bus number to be operated
on. The default is bus 0.
Each DV frame has a fixed size and it is easy to edit the frame order.
fwctl -R original.dv
Receive a DV stream with DV camera attached.
dd if=original.dv of=first.dv bs=120000 count=30
Get first 30 frames (NTSC).
dd if=original.dv of=second.dv bs=120000 skip=30 count=30
Get second 30 frames (NTSC).
cat second.dv first.dv | fwctl -S /dev/stdin
Swap first and second 30 frames and send them to DV recorder.
For PAL, replace ``bs=120000'' with ``bs=144000''.
fwctl -R file.m2t
Receive an MPEG TS stream from a camera producing MPEG transport stream.
This has been tested with SONY HDR-FX1E camera that produces HD MPEG-2
stream at 25 Mbps bandwidth.
To send the stream from the camera over the network using TCP (which
surprisingly works better with vlc), you can use
fwctl -R - | nc 192.168.10.11 9000
with pkgsrc/net/netcat and to receive the stream, use
nc -l -p 9000 | vlc -
To netcast via UDP, you need to use pkgsrc/misc/buffer, since vlc is not
fast enough to read UDP packets from buffers and thus it experiences
dropouts when run directly. The sending side can use
fwctl -R - | nc 192.168.10.11 9000
and to receive the stream, use
nc -l -u -p 9000 | buffer -s 10k -b 1000 -m 20m -p 5 | vlc -
For more information on how to work with vlc see its documentation.
mplayer(1), vlc(1), fwip(4), fwohci(4), ieee1394if(4), sbp(4)
The fwctl command first appeared in FreeBSD 5.0, as fwcontrol. It was
added to NetBSD 4.0 under its present name.
Hidetoshi Shimokawa <simokawaATFreeBSD.org>
Petr Holub <hopetATics.cz> - MPEG TS mode.
KIYOHARA Takashi <kiyoharaATNetBSD.org>
This utility is still under development and provided for debugging
purposes. Especially MPEG TS reception support is very rudimental and
supports only high-bandwidth MPEG-2 streams (fn field in CIP header
NetBSD 6.1.5 August 24, 2010 NetBSD 6.1.5