[PLUG-AV] Cameras : getting urgent now.

[Euan de Kock]

This looks good.

I'm starting to work with getting v4l devices talking to dvswitch now
anyway, but we've got a tried and tested solution with firewire that is
reliable so lets not complicate the setup at this stage.

The catch with USB devices, is that if they are not DV based (DV format
over USB) we need to encode the video into DV on the fly - and this may
be expensive in CPU terms. Most v4l devices like web cameras don't feed
out DV, but rather a simple jpeg/mpeg picture stream. I'm not sure what
video cameras provide over USB yet.

I'll start looking at the tally light system again - as we're moving to
a laptop based solution, we will probably lose any serial port option
for this, but I have some experience with developing circuits based on
Atmel micro controllers, and can develop a simple USB to LED interface
that looks like either a MIDI or Serial device - both easily scriptable
from Linux and driven directly from the USB port. This might be a nice
open source/open hardware project to feed back into the dvswitch project.

Regards,

Euan.


On 12/05/11 21:55, James Bromberger wrote:
> On 5/12/2011 7:10 PM, Nick Bannon wrote:
>> On Mon, Dec 05, 2011 at 02:55:07PM +0800, James Bromberger wrote:
>> On the bright side - Canon HV40's do SD-DV, HDV _and_ HDMI out. Do
>> they have a battery eliminator included, or do we need that too?
>
> http://www.canon.com.au/For-You/Digital-Video-Cameras/LEGRIA-Video-Cameras/HV40
> */Included Accessories/*
> /Wireless controller WL-D87 (Remote battery CR2025) /
> /Battery Pack BP-2L13
> /
> /Compact Power Adaptor CA-570 (see http://www.teds.com.au/canon-ca-570)
> /
> So looks like it.
>
>> We do need a line item for assorted cables, otherwise we will be forced
>> to pay for them as required, without being funded by the grant. (More
>> likely after they're required, which is typical, but irritating)
> Yes, such as the ExpressCard Firewire adaptors. Anyone want to jump on
> a quote for that.
>> [...]
>>> Why get a Fury (to capture HDMI to Twinpact to PC), when you have HDMI
>>> capture with the Blackmagic Shuttle above (HDMI direct to PC, no
>>> Twinpact required?)?
>> Exactly. The Fury gives us a low CPU known working capture option for
>> HDMI from cameras and HDCP-producing consumer electronics, with a few
>> manual switch overides that could come in handy.
>>
>> Direct HDMI capture doesn't give us any of that, but it's hopefully a
>> workable preferred option for future new equipment.
> I suspect that after we have a working solution from the grant, we'll
> want to tinker with purchasing a few additionals here and there to
> play with anyway. We can always put in another grant request to
> upgrade next year. What we need to address is the failing hardware,
> the complexity of the setup with additional screens and keyboards etc,
> and the availability of two cameras. Given we have our second-hand one
> we purchased, we have a spare already (or for bigger events).
>
> I also think we need more practice at producing a video. Having had
> Mumble working last month, it made a big difference to the variety of
> the content we could produce by coordinating vision switching and
> camera adjustment. Be good to get the tally light stuff working as well.
>
>   James
>
> -- 
> /Mobile:/ +61 422 166 708, /Email:/ james_AT_rcpt.to
> PLUG President 2011: http://www.plug.org.au <http//www.plug.org.au>
>
>
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