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Old January 3rd, 2008, 07:57 AM   #1
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live view digital camera capture

take a look at this link
http://it.youtube.com/watch?v=u6zxx8...A9DFBD&index=6
or this bigger version
http://www.juzaphoto.com/it/articoli..._canon_40d.htm
look at the snail and click on the picture
(it is an italian review of the 40d by canon)

this video is made with a canon 40d linked to a pc with a usb cable and using a screen capture program to record the live view preview of the software Canon EOS Utility 2.0

I haven't the 40d or any reflex photo-camera but maybe I'll plan to but one!
the video could be better than any 35mm adapter + video camera....because it do not use any adapter only the crop factor of the big camera sensor (in the canon 40d is apsc cmos sensor crop factor 1.6x)

did someone know some more of this incredible feature of the live view of the new digital camera!?
maybe is possible to write a small software (I'm not able to) with some more control to record this type of video

Matteo Pozzi

some link :
http://www.wlcastleman.com/equip/rev...icro/micro.htm
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Old January 3rd, 2008, 08:34 AM   #2
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Maybe I was hoping too much from that feature but is very cool already because of the small price

live view works like a 35mm adapter
it is just a "SECOND digital sensor in the path of the light reflected by the mirror.
This second sensor captures the image that is being reflected up to the optical viewfinder and then transmits that image to the camera's LCD."

I've found that the 40d second sensor is capable of 30fps but i can't find the size!

Edit:
for the nikon and the canon the live view is produced by binning the aps-c sensor but sub hd resolution

Last edited by Matteo Pozzi; January 3rd, 2008 at 02:39 PM.
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Old January 3rd, 2008, 08:38 AM   #3
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Matteo,

If you plan to buy a DSLR. I recommend the D3 or D300 full frame sensor nikon. That is if you dont have a lot of investment in canon lenses yet.

the footage seem to show typical canon noise. I have seen adapter footage that is better in noise handling.

Ted

Last edited by Ted Ramasola; January 3rd, 2008 at 08:43 AM. Reason: added text.
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Old January 3rd, 2008, 08:53 AM   #4
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thanks
cool with the d300 you have also video out with hdmi so could be recorded with a hdmi in pc card!
http://www.dpreview.com/previews/nikond300/page9.asp

edit:
according to
http://www.robgalbraith.com/bins/con...id=7-8742-9083
the Nikon live view is 15FPS, while Canon is 30 FPS.

Last edited by Matteo Pozzi; January 3rd, 2008 at 10:23 AM.
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Old January 3rd, 2008, 10:18 AM   #5
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from dpreview's forum:

http://forums.dpreview.com/forums/re...ssage=25071096

software used for screen capture:
http://www.techsmith.com/camtasia.asp
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Old January 3rd, 2008, 05:16 PM   #6
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Great Stuff, Matteo!

Thanks for posting these links, Matteo! Coincidentally, I had just seen the snail clip on youtube before I came this site and saw your posts. The clip, and the concept, is impressive.

I'd like to try using my HV20 to record to DV the composite video output of a 40d in Live View mode. I'll try this at Best Buy as soon as I can.

Rumor has it that the next Rebel, to be announced at PMA later this month, will have a video recording function...
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Old January 4th, 2008, 06:48 AM   #7
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looking on the net I've seen that the canon refresh rate is 30fps with 320x240 picture and nikon is 640x480 15fps ...for me the result of the snail movie is amazing if it is only 320x240 maybe in the near future we will have prosumer dslr with mjpeg recording 720p hd capabilities ...I've seen that nikon camera is very fast and can process 9.5 fps at full resolution 35mb/sec write on ultra fast cf card so I think that is only a marketing reason that the video recording is not implemented maybe with a firmware upgrade can be introduced! the hardware power is already here and binning those big sensor is not difficult cause the stream is already made for the live view function! finger cross for next rebel video recording!
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Old January 7th, 2008, 02:52 AM   #8
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I tried it!

Hey I went into Best Buy a few hours ago with my HV20 and a few cables and was able to make a DV recording of the NTSC video output from the Canon D40 in Live View mode.

The results were mixed.

Unfortunately, I didn't know how to lock the camera's exposure, to prevent it from gaining up and down in changing light. I think it may be possible to do this. Anyway, the image looked pretty great in bright light. In lower light the camera would gain up, introducing a lot of noise.

Sadly, rolling shutter artifacts were very evident, and I couldn't get rid of the white rectangle that defines the area you want to zoom into. I could only move it to the top of the screen to get it out of the way. I'm not sure whether or not it can be turned off.

Otherwise, I was pretty impressed. The motion looked perfectly normal and the colors looked fantastic. I'll put a sample on Youtube or something tomorrow.

I have very high hopes for the next Rebel.
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Old January 12th, 2008, 01:36 PM   #9
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The new Nikon DSLRs output 1080 live previews via HDMI. If you're able to capture HDMI, you should be able to do something interesting with them. I don't think the Canons have HDMI out...
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Old January 13th, 2008, 05:24 PM   #10
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I know but limited for the live view video hdmi output it send only 640 x 480 at 15 frame second we have to wait till pma :-)
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Old January 13th, 2008, 07:49 PM   #11
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I put a sample up here:

http://www.youtube.com/watch?v=pfBEJZDK8cg
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