SDB:Dvswitch howto

Jump to: navigation, search
Icon-cleanup.png This article is in need of attention because it does not follow our wiki guidelines.
If you want to contribute, please read the rules for this wiki and if you have any questions, don't hesitate to contact the wiki team, we are more then willing to help you! :-)
                                   jw, Mon Feb 27 21:47:15 UTC 2012
Using a Canopus Twinpact 100

## on all involved machines do:
osc -Apm in dvswitch

## on the twinpact machine, (and on all remote camera capture machines)
## replace with the IP Address of the one machine that runs 
## the dvswitch gui (known as the mixer)
sudo vi /etc/dvswitchrc

## connect all involved machines to the mixer with dedicated ethernet cables.
## use gigabit, if more than one twinpact machine needs to be connected.

# Check the dipswitches at the bottom of the twinpact. 
#  A3 must be on to enable the remote control
#  B7 (DVCAM/DV) does not seem to matter.

-> switch on twinpact
-> hit [INPUT SELECT] twice to select RGB input.
# twinpact remembers input selection and overscan mode 
# across power-loss. nice.

## on the twinpact machine: 
dmesg | grep firewire 
 firewire_ohci: isochronous cycle inconsistent
 firewire_core: created device fw1: GUID 002011010f003159, S400
 firewire_core: phy config: card 0, new root=ffc1, gap_count=5
 firewire_core: IRM is not 1394a compliant, making local node (ffc0) root.
 firewire_core: phy config: card 0, new root=ffc0, gap_count=5

# this only succeeds, when the mixer is up and running
sh -c 'while true; do sudo dvsource-firewire -t; sleep 2; done'

## on the storage machine (usually the mixer itself)
sh -c 'while true; do dvsink-files /tmp/dvswitch/test-%F-%T; sleep 2; done'

## on the mixer machine:
dvswitch &
 -> if the twinpact video signal shows a fat black border, try the 
    -> Twinpact remote control
      -> [OverScan] 
  # a gray half-translucent border is okay. 
  # It is only onscreen, but not recorded.

 -> Hit [Record]
   -> be happy.
   -> regularly check disk space.

# dvsink-files just stops writing if it runs out of space. 
# no error messages nothing on the gui.

# A dvswitch videostream takes a bandwithd of ca. 3.7 Mbytes/sec.
# Thus one twinpact + one camera + one dvsink-files together 
# consume ca. 11Mb/s

# dvswitch itself consumes ca 50% of a 1.6Ghz intel 32bit CPU,
# together with one source and one sink, the load average
# on a Lenovo X60s is ca 0.7 -- (including possile 0.3 from 
# a firefox with a bloody flash player showing advertisements).
# -> quite acceptable.