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by Rayden
Sun May 25, 2014 11:51 am
Forum: Camera board
Topic: Fixed shutter speed with video
Replies: 4
Views: 6470

Re: Fixed shutter speed with video

raspivid -ISO 100 -ss 1 -fps 0 -o test2.h264 does give a complete black video. The problem of setting -ss first and then -exposure is that the exposure settings will overwrite the shutter speed settings. Hi ethanol, This does the trick, indeed I can get underexposed video this way. The position sen...
by Rayden
Mon May 12, 2014 12:06 pm
Forum: Camera board
Topic: CME -x postponed?
Replies: 56
Views: 16077

Re: CME -x postponed?

Note you get one integer per macroblock (16x16 block) with the MS word the minimum absolute sum of differences found and the LS word the 8 bit vector in pixels (signed) Hi Gordon, Just quick question, vector is in whole pixels not quarter pixels? Does the pi encoder produce quarter-pixel vectors in...
by Rayden
Sun May 11, 2014 11:44 am
Forum: Camera board
Topic: Fixed shutter speed with video
Replies: 4
Views: 6470

Re: Fixed shutter speed with video

Hi, What exactly is your problem with raspivid and the shutterspeed? The shutter speed setting does not work for video. Why do you think it makes problems? Which commands do you try to run? I think I tried raspivid --shutter=1, 10, 100, ... 100000, optionally combined with --ISO=100 to 1600, --expos...
by Rayden
Sun May 11, 2014 10:52 am
Forum: Camera board
Topic: Fixed shutter speed with video
Replies: 4
Views: 6470

Fixed shutter speed with video

Hi guys, I am interested in having a fixed shutter speed with video, ie turning auto exposure off. I have previously experimented with raspistill/raspivid --shutter option, and I found that while it does exactly what is expected in raspistill, it had no effect in raspivid (and no error; the option i...
by Rayden
Sun May 04, 2014 9:56 pm
Forum: Camera board
Topic: When is binned mode used?
Replies: 6
Views: 1359

Re: When is binned mode used?

6by9, Thank you, that does answer the question about what mode is used when. The reason I mentioned ROI in relation to binning is that, if using a small ROI, it is better to not bin: I think the image quality would be better if (for example) a 100x100 ROI in the middle of the image is picked from th...
by Rayden
Sun May 04, 2014 7:59 am
Forum: Camera board
Topic: When is binned mode used?
Replies: 6
Views: 1359

Re: When is binned mode used?

P.S. Related question: What formula should be used to make ROI not do any scaling, ie produce one pixel per original pixel exactly? (for example, encode at 100x100 resolution a 100x100 original area from the full sensor or binned sensor) Also, how (what algorithm and where) does ROI do the scaling?
by Rayden
Sun May 04, 2014 7:38 am
Forum: Camera board
Topic: When is binned mode used?
Replies: 6
Views: 1359

When is binned mode used?

Hello, I am testing the new full sensor modes announced in http://www.raspberrypi.org/new-camera-mode-released/ First, thank you! This was an eagerly awaited feature for me and I think for many other people. Getting high fps modes in addition to full FOV was very, very nice. I am wondering how to co...
by Rayden
Tue Jan 07, 2014 12:01 pm
Forum: Camera board
Topic: How to turn off auto-anything?
Replies: 17
Views: 7547

Re: How to turn off auto-anything?

Actually, when using the V4l2 driver, the frame rate changes by virtue of the set manual exposure time. When I set exposure_time_absolute=10000 I get 1 fps. Interesting. Does the video also get brighter or darker? Any idea why/how this works in v4l2 but not raspivid? Does v4l2 also run on top of MM...
by Rayden
Fri Jan 03, 2014 9:39 pm
Forum: Camera board
Topic: How to turn off auto-anything?
Replies: 17
Views: 7547

Re: How to turn off auto-anything?

Actually, when using the V4l2 driver, the frame rate changes by virtue of the set manual exposure time. When I set exposure_time_absolute=10000 I get 1 fps. Interesting. Does the video also get brighter or darker? Any idea why/how this works in v4l2 but not raspivid? Does v4l2 also run on top of MM...
by Rayden
Fri Jan 03, 2014 9:38 pm
Forum: Camera board
Topic: How to turn off auto-anything?
Replies: 17
Views: 7547

Re: How to turn off auto-anything?

'raspistill --help' gives all the options, or there is the documentation in the raspi github where all the source code is. Yes, of course. I can't see any auto settings other than exposure, ISO, and awb though. What else gets auto-detected? Exposure (the different presets, eg night, sports...) seem...
by Rayden
Fri Jan 03, 2014 9:52 am
Forum: Camera board
Topic: Video without center-crop?
Replies: 4
Views: 970

Re: Video without center-crop?

Thank you, James. Yes please, do look into this soon, I think this is something that a lot of people are interested in. Btw: I am surprised that you get no frames, as opposed to (for example) malformed frames (as might happen if the width/height/color format is set incorrectly). Where do the Omnivis...
by Rayden
Fri Jan 03, 2014 9:45 am
Forum: Camera board
Topic: How to turn off auto-anything?
Replies: 17
Views: 7547

Re: How to turn off auto-anything?

Thanks again. I have tried most combinations, raspistill shutter works, raspivid accepts the shutter option but there is no effect, it does auto-exposure anyway. I am quite interested in working on the code to make this happen (and also the other auto-settings which are "a pain to turn off", any hin...
by Rayden
Fri Jan 03, 2014 9:39 am
Forum: Camera board
Topic: How to turn off auto-anything?
Replies: 17
Views: 7547

Re: How to turn off auto-anything?

James,
Thank you for the reply. I am mainly interested in having fixed exposure/shutter speed throughout the video clip, so that the apparent illumination level never changes if the real level doesn't change. How can video exposure/shutter speed be set to a fixed value?
Thanks,
Rayden
by Rayden
Fri Jan 03, 2014 5:05 am
Forum: Camera board
Topic: How to turn off auto-anything?
Replies: 17
Views: 7547

How to turn off auto-anything?

Hello, I would like to turn off all auto-adjustments that the camera does. My use case is a scene with known constant illumination and very minor changes in the scene itself, and I see that even so the RPi camera keeps varying its exposure and white balance between successive stills or within a vide...
by Rayden
Fri Jan 03, 2014 4:33 am
Forum: Camera board
Topic: Video without center-crop?
Replies: 4
Views: 970

Video without center-crop?

Hello, Is it currently possible to get video from the sensor without center-cropping? (so that the full sensor is used, presumably using 2x2 binning on the sensor) If yes, how? If no, is anyone working on it? Is there an estimated timeframe for when this feature might be complete? What is involved i...

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