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-   -   High Definition with Elphel model 333 camera (https://www.dvinfo.net/forum/apertus-open-source-cinema-project/63677-high-definition-elphel-model-333-camera.html)

Oscar Spierenburg February 1st, 2008 07:13 PM

Odd, interesting post. I was looking into those lenses myself recently.
In my opinion, an Elphel(+hard disk) with OVF(optical viewfinder) and a simple focus assistant in the software on a mobile controller... all powered by a 12v battery.. will be the best option available for us the coming months(?)
If this workable setup is ready, we can go on improving it, but I think it is the way to go.

Odd Nydren February 1st, 2008 07:17 PM

Quote:

Originally Posted by Andrey Filippov (Post 818705)
cool program (mostly FPGA code) in the last software (7.1.7.11) on Sourceforge for focusing.

Excellent! I'd love to try it out but my apple cinedisplay cant display 640x480 resolution...or rather my Nvidia card cant drive the display properly with lower res...and that means that all text when I boot the live CD (just like the bios boot text) isnt visible...all I get is a black screen. Thanks Nvidia...

..so is there any other way to upgrade the camera software...using win xp?
(I really need to sort out a linux partition)

Odd Nydren February 1st, 2008 07:20 PM

Quote:

Originally Posted by Oscar Spier (Post 818782)
all powered by a 12v battery.

12v?! you got a modified elphel?? ...or have you found a way to solve the 48v problem...?

Also - do you have an elphel with a running harddrive yet? Im about to buy a harddrive and will add the zif extension board to the elphel as soon as I got the drive and a proper casing...

Andrey Filippov February 1st, 2008 07:24 PM

Odd,

Maybe you can find some other computer around? I tried to support reflashing of Axis processors for WIndows at the beginning, but it was really difficult - required WinPCap library kept changing (loosing compatibility with my software) and different Windows (W95, W2K) also were not compatible to each other so I gave up.

It will also be useful if you can post on our wiki - what type of the computer did not work with the Live DVD.

You may also search for "knoppix cheat codes" or "knoppix + your_computer" -- sometimes it is possible to make it work just by adding the proper command line at boot prompt.


Andrey

Odd Nydren February 1st, 2008 07:42 PM

Quote:

Originally Posted by Andrey Filippov (Post 818787)
Maybe you can find some other computer around?

Hmmm I've got two screens with my machine but none of them work in text mode...I'll try this cheap flat screen tv I got...think its got a vga input.

Quote:

Originally Posted by Andrey Filippov (Post 818787)
I tried...WIndows at the beginning, but it was really difficult...I gave up.

I truly understand...in short - windows sucks.
I wouldnt use it if I wasnt forced to while I work.
(need certain software)

Quote:

Originally Posted by Andrey Filippov (Post 818787)
post on our wiki what did not work with the Live DVD.

Once I've found out why I dont get any text mode on my screen and a possible workaround - I'll definitely post it.

Quote:

Originally Posted by Andrey Filippov (Post 818787)
..sometimes it is possible to make it work just by adding the proper command line at boot prompt.

Hmm good idea...maybe I can make some kind of config file with the drivers & resolution I need it to start with. I'll look into that in case my cheap tv doesent work. I'll see how it goes...now - time for sleep. 1:30am here ;)

I'll let you know how it goes!!

Oscar Spierenburg February 1st, 2008 07:44 PM

Quote:

Originally Posted by Odd Nydren (Post 818786)
12v?! you got a modified elphel?? ...or have you found a way to solve the 48v problem...?

Also - do you have an elphel with a running harddrive yet? Im about to buy a harddrive and will add the zif extension board to the elphel as soon as I got the drive and a proper casing...

Not really(my 333 is 12v), but Andrey spoke about a voltage doubler-kind- of device, so I was more or less pointing out the possibilities in the near future.

I have the hard-drive right here, I just need to put everything together, because I was building the OVF and the hard-drive needs a custom made body. I'll do that next week or so.

Edit... time to sleep too... 2:30 AM over here! :|

Odd Nydren February 3rd, 2008 12:12 PM

Quote:

Originally Posted by Oscar Spier (Post 818798)
Not really(my 333 is 12v), but Andrey spoke about a voltage doubler-kind- of device, so I was more or less pointing out the possibilities in the near future.

Ah! I see...I was very excited thee for a second ;)

Quote:

Originally Posted by Oscar Spier (Post 818798)
I have the hard-drive right here, I just need to put everything together

Cool - let us know when its up n running!! :)

Steven Mingam February 4th, 2008 04:21 AM

You can get 48v from 12v quite easily, there is various electronical component designed for that (48v phantom powered mic anyone ? There is lot of sound card powered from usb offering that feature).

Check this link (in french, sorry) for various solutions :
http://www.sonelec-musique.com/elect...s_phantom.html

The problem is the elphel's power consumption and if those components support it.

Odd Nydren February 5th, 2008 05:15 AM

Quote:

Originally Posted by Steven Mingam (Post 819772)
You can get 48v from 12v quite easily (48v phantom powered mic anyone ?) The problem is the elphel's power consumption...

Yeah I'm afraid that may be the core problem...
..from what I've seen most of the 48v phantom power audio gear only supplies around 10mA or so...while according to Andrey the Elphel would need the power from two USB ports...so in other words (500ma/USB port) it sounds like 10mA would be less than a tenth what is needed.

Maybe Andrey could enlighten us?

Daniel Lipats February 5th, 2008 09:48 AM

In my camera I use the integrated PC's power supply to run a 12v 7" LCD.

You can get 12v from a pc power supply. (the yellow and black end on molex)

If you remove the board out of the PSU body its pretty small. About 3x4 inches or so. Be sure to cool it, I have an intake fan on the camera body cooling the PSU. Oh, there are also fanless PSUs but they are expensive. Make sure you have enough watts to power all the components.

Do at your own risk. Im no electrician, and its best to consult Andrey.


Odd,
Did my suggestion work for you? Did you ever get your pc to boot the live cd?

Odd Nydren February 5th, 2008 09:59 AM

Hi Daniel!

Thanks for the suggestions Daniel...it turned out I didnt need to give knoppix any kind of command (although I appreciated the moral support)...I just had to switch my secondary 160USD screen into the main DVI socket used by my 900USD screen...apparently the cheap one could do text mode while the apple one could not. Fun. ;) - never underestimate the power of cheap OEM gear :D

Regarding the power issue...there are battery powered 48v power supplies made for powering microphones...but they seem to be all to weak to run the Elphel...too bad. It would be cool to be proven wrong.

Marie Guillaume February 14th, 2008 04:04 PM

Who made this ?
 
1 Attachment(s)
hi there,

i found this picture on the elphel wiki.

Who made this picture ?
Is there a sample clip of this shot available ?

cheers,

Marie Guillaume

Daniel Lipats February 14th, 2008 04:10 PM

Thats a clip from a short film I shot with the 333.

That scene was shot in two locations, the location in the picture is not used in the current edit. The film is currently in post-production.

I don't have any videos to share at the moment.

Oscar Spierenburg February 14th, 2008 04:52 PM

Another thread was started some days ago about the Elphel image quality. How about posting everything about image sharpness, color and compression over there?
http://www.dvinfo.net/conf/showthread.php?t=114676

Marie Guillaume February 18th, 2008 02:43 PM

Sumix vs Elphel...
 
Hi there,

Did anyone try the last revision of the Sumix Camera 12A2C ?

Is it good for HD shooting ?

Cheers,

Marie Guillaume


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