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by towolf
Sat Oct 26, 2013 8:01 am
Forum: Camera board
Topic: streaming question
Replies: 6
Views: 3079

Re: streaming question

Typo?

-f flv is needed for RTMP
by towolf
Wed Oct 23, 2013 2:31 pm
Forum: Camera board
Topic: raspivid --timeout 0 not working
Replies: 13
Views: 5044

Re: raspivid --timeout 0 not working

Well, I'm now backtracking through git (which you called a slow motion train wreck) to find a last-known-good commit. And doing that takes a lot of time. Meanwhile (waiting for compiles) I took the time to notify you that the recent changes had side effects, since you said you were not aware that an...
by towolf
Wed Oct 23, 2013 2:10 pm
Forum: Camera board
Topic: raspivid --timeout 0 not working
Replies: 13
Views: 5044

Re: raspivid --timeout 0 not working

This option was highly appreciated. We had a lot of talk months ago about what the maximum milliseconds are that fit into a 32-bit integer. Then finally someone came to send a pull request (actually more than one person did) to make -t 0 indefinite operation. Now it's clobbered again. Wasn't there s...
by towolf
Fri Oct 11, 2013 9:04 pm
Forum: Camera board
Topic: bitrate & keyframe howto?
Replies: 10
Views: 3191

Re: bitrate & keyframe howto?

Yes -ex night makes framerate variable. But within limits: 4-30 fps. So i pegged framerate at 4 FPS instead to get more sensitivity at constant frame rates.
by towolf
Fri Oct 11, 2013 8:40 pm
Forum: Camera board
Topic: bitrate & keyframe howto?
Replies: 10
Views: 3191

Re: bitrate & keyframe howto?

I think we use a constant bitrate (or at least it attempts to). That is not really the case here: http://i.imgur.com/0fuQ8Uv.png this is with /opt/vc/bin/raspivid -v -n -pf high -ex night -mm matrix -w 1920 -h 1080 -fps 4 -g 60 -t 0 -b 25000000 So perhaps the 4 FPS is messing with the rate control
by towolf
Fri Oct 04, 2013 11:34 pm
Forum: Camera board
Topic: Error on raspivid
Replies: 6
Views: 2937

Re: Error on raspivid

RaTTuS wrote:-t 0 is probably too fast
why -hf and -vf
and -
should be right at the end
That’s not true. - acts like a file name and makes the program write to stdout file descriptor.
by towolf
Tue Oct 01, 2013 6:09 pm
Forum: Camera board
Topic: External driver development
Replies: 4
Views: 946

Re: External driver development

He said it’s coming, there are still hangs.
by towolf
Mon Sep 30, 2013 11:19 am
Forum: Camera board
Topic: External driver development
Replies: 4
Views: 946

Re: External driver development

No, that’s a hacky shim.
by towolf
Sun Sep 29, 2013 9:16 pm
Forum: Camera board
Topic: External driver development
Replies: 4
Views: 946

External driver development

What is this guy talking about here: https://www.youtube.com/watch?feature=player_detailpage&v=XRS45-IOM6w#t=2569 It is Daniel Stone of Collabora speaking. Collabora worked on Wayland integration for the foundation. He says: "We’ve done a number of other dull things, like a V4L driver." Where’s this...
by towolf
Thu Sep 26, 2013 8:56 pm
Forum: Camera board
Topic: raspistill - exposure
Replies: 86
Views: 33300

Re: raspistill - exposure

A longer hysteresis would be enough for now. Suppose that is a constant.
by towolf
Thu Sep 26, 2013 3:11 pm
Forum: Camera board
Topic: raspistill - exposure
Replies: 86
Views: 33300

Re: raspistill - exposure

jamesh wrote: Are you sure? Are you talking about the ability to individually set custom gains for G and B (i.e. proper custom white balance)? I've never seen that except on DSLRs.
First hit on Google for Canon IXUS pdf manual

Image

IXUS are 60-200 EUR P&S cameras
by towolf
Thu Sep 26, 2013 11:06 am
Forum: Camera board
Topic: Can raspivid record a series of short files continuously?
Replies: 4
Views: 1942

Re: Can raspivid record a series of short files continuously

As a stop-gap workaround you can pipe continuous video into ffmpeg to let it segment and package the stream gaplessly.

http://www.raspberrypi.org/phpBB3/viewt ... 99#p368099
by towolf
Wed Sep 25, 2013 9:29 pm
Forum: Camera board
Topic: Pi-Noir - 'Night' vision camera (IR filter removed)
Replies: 57
Views: 33782

Re: Pi-Noir - Night vision camera

It is not a night vision camera if only the filter is left out. The low light sensitivity is too bad for that.

If you need to add an infra-red light source to light the scene to make anything visible at night that is something entirely different.
by towolf
Wed Sep 25, 2013 9:26 pm
Forum: Camera board
Topic: raspistill - exposure
Replies: 86
Views: 33300

Re: raspistill - exposure

Not at present, and unlikely to be done as there is such a limited 'market' for it. After all, how many people actually use the 'custom wb' setting on their camera - if it even exists on the lower end as it seem to be only on DSLRs as far as I have seen. That’s not true. 100 EUR P&S all have this, ...
by towolf
Wed Sep 25, 2013 4:25 pm
Forum: Camera board
Topic: raspistill - exposure
Replies: 86
Views: 33300

Re: raspistill - exposure

All fixed-preset-WB does is to set a white point in Kelvin of black body radiance. If "sunny" is D65 or 6500K, and "cloudy" is D55 or 5500K, and "tungsten" is 3000K, the question is merely, is it possible to set a white point via numeric input to all points of the scale. White point changes graduall...
by towolf
Sun Sep 22, 2013 10:41 pm
Forum: Camera board
Topic: Camera module on Arch Linux?
Replies: 12
Views: 17988

Re: Camera module on Arch Linux?

If you remove the references in the first post to .elf and .dat files and add this line, does it work then?

Code: Select all

start_x=1
by towolf
Sat Sep 21, 2013 12:39 pm
Forum: Camera board
Topic: Camera module on Arch Linux?
Replies: 12
Views: 17988

Re: Camera module on Arch Linux?

And you do not need Xorg if you do not want it.
by towolf
Sat Sep 21, 2013 12:39 pm
Forum: Camera board
Topic: Camera module on Arch Linux?
Replies: 12
Views: 17988

Re: Camera module on Arch Linux?

I did this, and borked my installation (it just hangs at the raspberry pi image). I'm guessing I was either supposed to install X first, or that I was supposed to comment out the other gpu_mem lines in config.txt... Any possible explanations would be helpful. Meanwhile I'm going to mount my SD card...
by towolf
Sat Sep 21, 2013 12:09 pm
Forum: Camera board
Topic: USB cameras (webcams) on Raspberry Pi
Replies: 73
Views: 37906

Re: Consider a USB camera as an alternative

Webcams, I believe, use variable frame rate, since they are not bothered about maintaining a fixed rate, which we are. So in darker conditions the rate is lowered to help exposure times. This is how -ex night used to work. It ranged between 4fps in low light and 30fps in fully lit conditions. And t...
by towolf
Thu Sep 19, 2013 10:22 pm
Forum: Camera board
Topic: Camera Module NGINX
Replies: 66
Views: 13792

Re: Camera Module NGINX

I’ve found out what the problem with my tutorial was. I’ve missed a file that magically was present on my system when I wrote the guide, but isn’t on a clean arch linux arm pi system:

http://ftp.tuebingen.mpg.de/pub/kyb/tow ... ermissions
by towolf
Wed Sep 11, 2013 11:37 am
Forum: Camera board
Topic: Example pictures and "low-light" question
Replies: 5
Views: 6519

Re: Example pictures and "low-light" question

Low light sensitivity is quite bad. There used to be a method to adaptively use lower frame rates and hence longer exposure times in darkness but that got broken at some point. Here’s an example: https://vimeo.com/66772178 Though I agree that low light sensitivity likely isn't great, I think the sa...
by towolf
Mon Sep 09, 2013 8:19 pm
Forum: Camera board
Topic: Example pictures and "low-light" question
Replies: 5
Views: 6519

Re: Example pictures and "low-light" question

Low light sensitivity is quite bad. There used to be a method to adaptively use lower frame rates and hence longer exposure times in darkness but that got broken at some point.

Here’s an example: https://vimeo.com/66772178
by towolf
Sat Aug 31, 2013 6:00 pm
Forum: Camera board
Topic: output stream from raspivid seems weird and uncontrollable
Replies: 1
Views: 2324

Re: output stream from raspivid seems weird and uncontrollab

Compile real ffmpeg, not the stupid fork.
by towolf
Wed Aug 28, 2013 4:43 pm
Forum: Camera board
Topic: Camera Module NGINX
Replies: 66
Views: 13792

Re: Camera Module NGINX

No root please. And please familiarize yourself with UNIX basics.

You need to chown or chgrp the destination directory.

If your web server runs as www-data then chgrp or chown to www-data. And test as "sudo -u www-data -s".

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