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Old July 30th, 2008, 05:56 AM   #961
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Yes, soon I hope.
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Old August 17th, 2008, 05:01 AM   #962
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While I now wait for my Elphel camera to arrive I started working on the next big project:

A new Elphel camera body especially designed for professional filmmakers.
Working title for now is the "Elphel Cinevision"

It will be a lot bigger than the current surveillance like camera body and should have enough room for 2 swapable CF cards and 1.8" or 2.5" HDDs. There will be some custom battery pack solution and an HD LCD display at some point.

The first thing I started to toy around was designing an exchangeable lens mount that is not just an adapter ring.

The image below shows the (not assembled) lens mount parts.
The lens mount plate can contain mounts for C-Mount, PL-Mount, Canon, Nikon, ....
I also had the idea of adding rods to the mount plate.

What do you think of this so far?
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High Definition with Elphel model 333 camera-lens-mount-01.jpg  
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Old August 20th, 2008, 05:17 AM   #963
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I like the idea. I also liked the camera body for developers they where discussing at Elphel : 10349 - ElphelWiki
Maybe you could keep the idea of an expandable body where you can easily ad a new part.
It's a bit similar to the RED camera.
Otherwise you'll maybe end up with a big square box.
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Old September 7th, 2008, 01:30 PM   #964
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I got my camera (possibly the first delivered model with built in 1.8" HDD) this week, thanks Elphel!

On Friday I did some tests with the harddisk recorder.

I successfully recorded a 1920x1088 movie at 90% jpeg quality and 25 fps. One frame was around 550kb big which resulted in a 100mb quicktime file for 7 seconds.

Sorry but no file upload yet to take a look at yet as the video showed just a dark empty room. But stay tuned! As soon as I shot anything, that I don't have to be ashamed of showing, I will post it here.

In the meantime I did some modifications to the web based camera interface to honor the video filmers choice in framesizes a little more than the old list (see attachment).

I also did a comparison between elphel internal and post applied demosaicing algorithms over at the elphel wiki. -> Demosaic on client side - ElphelWiki

The conclusion was that the certain amount of blur that the elphel shot images still show are the result of a still very basic implementation of bilinear demosaicing in the camera.
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Old September 8th, 2008, 03:28 AM   #965
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Wow

not dead this thread , way big fun
still alive, way better
take please a look at
Active Silicon Limited - Imaging Products, Systems and Solutions

Core 2Duo
Firewire
Usb2
GIG E
total passive cooling
I bet looks like a wearable portable solution
could do anything the Ephel cam does not have on board
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Old September 9th, 2008, 11:58 AM   #966
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good piece!

But I think I would prefer if the elphel camera itself had everything onboard that I need ;)
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Old September 12th, 2008, 11:49 AM   #967
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7.2 software

I'm working hard and hope to have 7.2 software soon (all FPGA and most driver code is written - starting debugging next week) - it will support pipeline operation - coordinated parameters change without acquisition pipeline restart. And - it has multiple modes of encoding, JP4 (JPEG-encoded raw Bayer) in it can run 1.5 times faster, supporting full sensor FPS (i.e. 5MPix@15fps)
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Old October 7th, 2008, 01:48 AM   #968
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I finally was able to shot RAW video with my elphel camera!

Having enough free time, software development progress and good weather finally fell together yesterday.

The image sequence was converted to a DNG sequence and could then be imported into AfterFX.

Video will follow later today.

Check out the image below:
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High Definition with Elphel model 333 camera-ae_raw.jpg  
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Old October 7th, 2008, 04:37 AM   #969
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That's an enormous progress. What frame rate/frame size where you able to capture?
Did you capture to the PC or directly to the cameras HDD?
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Old October 7th, 2008, 04:57 AM   #970
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I recorded 1920x1080 Full HD @ 24fps to camera internal HDD.

The workflow is still a bit cumbersome:
-) Camera writes jp4 encoded jpeg image sequence onto internal HDD (the HDD recorder webinterfaces I wrote simplifies this task greatly)
-) grab the images from the camera with an ftp client of your choice.
-) there is a linux commandlinetool (dcraw author & elphel cooperation) from the past that transforms a jp4 jpeg into adobes digital color negative file (*.dng) which is a raw format. I wrote a small script that batch converts a whole directory
-) batch rename your dng sequence and import it into a software that can read dngs (since its adobes own file format most CS3 Suite tools should be able to open it), I used After FX CS3

Full HD xvid avi (63MB): http://www.oneartplease.com/files/elphel_raw_full.avi

I also uploaded it as 1280x720 video to vimeo but it says its still compressing:
Elphel Raw Test Footage on Vimeo
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Old October 7th, 2008, 07:52 AM   #971
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vimeo says its private video...
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Old October 7th, 2008, 07:56 AM   #972
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Vimeo video is now online, but the avi is much higher quality.

Last edited by Sebastian Pichelhofer; October 7th, 2008 at 03:22 PM.
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Old October 7th, 2008, 10:17 AM   #973
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Not bad at all! There seem to be some artifacts in moving objects in the RAW video. But overall the quality has improved very much, also the mjpeg compressed one (compared to my own test a couple of months ago).
I hope I will have time to do some testing with this soon!
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Old October 8th, 2008, 12:10 AM   #974
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Quote:
Originally Posted by Sebastian Pichelhofer View Post
Vimeo video is now online, but the avi is much higher quality.
Here is a mirror http://community.elphel.com/videos/elphel_raw_full.avi - it may be faster
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Old October 13th, 2008, 03:30 AM   #975
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wow looks good with a very good dinamyc range!
how about the rolling shutter problem!?
have you done something to reduce it?
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