2010/8/11 Christoph Willing <c.will...@uq.edu.au<mailto:c.will...@uq.edu.au>>
On 12/08/2010, at 7:07 AM, Richard Palmer wrote:
Dear Chris,
I just made a quick build of the latest vic for amd64 lenny. Its at:
http://www.vislab.uq.edu.au/debuntu/lenny/ag-vic2.8ucl_1.4.0r4876_amd64.deb
An i386 version should be there fairly soon too.
I haven't been able to check it fully since its a holiday here today
and I don't have a lenny machine with the blackmagic driver installed.
It needs dkms which isn't available for lenny although I believe
there's a package in progress for squeeze. Anyway if you've resolved
all that already, then the package above may work. You'll have to use
dpkg to install it as I haven't properly added to our repo until I can
test it more thoroughly.
Worked perfectly, many thanks Chris.
Richard,
Great, thats good to hear.
I used a backported version of dkms.
I've also built a dkms package for lenny, available now in the UQVislab repo.
Could only test it with PAL camera over s-video today, that was fine, will
try to test the HD camera later in the week and report back.
I'm still trying to piece Access Grid together as a system so forgive the
possibly foolish next question, but if I launch the standalone HD vic can
that then be used as part of a AccessGrid session in some way ? (using
the Venue client). If so, how ?.
Once the VenueClient is in a venue, the multicast addresses for the default
video stream can be found via the the Venue->Properties... menu (a window
should appear with the details). You could then start up your HD vic manually
using the address you find there for the video stream.
Be aware that full HD video requires quite a bit more bandwidth than the
steams we've become used to. This means you'll probably need to add a '-B'
option when you start up vic manually (it sets the maximum bandwidth that vic's
bandwidth slider can be set to). I've found -B 8000 (max = 8Mb/s) to be good so
far. Without setting that explicitly, a max of 3Mb/s is used on my vic, which
vic deals with by limiting the frame rate of the stream.
When you have your Blackmagic card & HD camera set up, you'll be able to
select it from the Device list in vic's Option window - it'll show up as
something like "Blackmagic-Intensity Pro". You'll also have to select the input
connection being used (HDMI, Component, ...) from the Port button; also the
format e.g. HD-1080i-50 from the Signal button.
Don't forget to set the Encoder to h264 (mpeg4 also works). This will enable
the "large" radio button on the right hand side, which you should select to
enable transmission of the full HD signal.
Any other vic in the venue you've chosen should now receive your stream and
display it if it was built with the necessary codec.
Hi,
I should point out that video over a certain size (somewhere between
1280x720 and 1920x1080, maybe only limited to mpeg4/h.264, though the latter is
the only codec that can effectively do HD well) will probably crash older
versions of vic, if they support that codec and attempt to decode it.
--Andrew
All that is a bit cumbersome at the moment (even if fun to play around with
initially) and will be taken care of automatically when a dedicated AG Service
is shipped - should be real soon now.
chris
Christoph Willing +61 7 3365 8316
QCIF Access Grid Manager
University of Queensland
