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by towolf
Fri May 17, 2013 5:04 am
Forum: Camera board
Topic: Low Light/-ex verylong
Replies: 7
Views: 2174

Re: Low Light/-ex verylong

I found that night actually reduced fps to 5 in the video stream and definitely boosted exposure.

verylong however crashes the freezes the camera here and I have to power cycle the device before I can use it again.
by towolf
Fri May 17, 2013 4:10 am
Forum: Camera board
Topic: Getting Streaming working to a PC
Replies: 35
Views: 10873

Re: Getting Streaming working to a PC

Use apt-get? I’m not sure how much the one-liners have to be adapted if you want to use gstreamer 0.10 on Raspbian. Probably not a lot. Arch has 1.0. The used elements are in gstreamer0.10-plugins-good and gstreamer0.10-plugins-bad and the gst-launch utility is in gstreamer0.10-tools. This installs ...
by towolf
Fri May 17, 2013 12:08 am
Forum: Camera board
Topic: Getting Streaming working to a PC
Replies: 35
Views: 10873

Re: Getting Streaming working to a PC

I’ve set up RTP streaming from Arch Linux to Ubuntu Linux using Gstreamer. raspirecv #!/bin/sh gst-launch-1.0 -e -v udpsrc port=5001 ! application/x-rtp, payload=96 ! rtpjitterbuffer ! rtph264depay ! avdec_h264 ! fpsdisplaysink sync=false text-overlay=false raspisend #!/bin/sh gst-launch-1.0 -e -v f...
by towolf
Wed May 15, 2013 8:21 pm
Forum: Camera board
Topic: My Camera arrived today... what now?
Replies: 108
Views: 28421

Re: My Camera arrived today... what now?

The raspicam progams do, but motion can't use stdin as its camera input - gstreamer might be able to? Ahh, I didn't know that about Motion. Good to know. I can confirm that you can pipe stdout into a gstreamer pipeline using a pipeline starting with: ./capture -c 100000 -o | gst-launch-1.0 -v -e fi...
by towolf
Wed May 15, 2013 1:39 pm
Forum: Camera board
Topic: My Camera arrived today... what now?
Replies: 108
Views: 28421

Re: My Camera arrived today... what now?

But that's the point! You need precise timing to be able to sync with external or separate sound, among other things that also need precise timestamps. If sound were muxed at the time of capture it wouldn't be so necessary, but without it, it is crucial for AV synch. My point was that since the cam...
by towolf
Tue May 14, 2013 4:16 pm
Forum: Camera board
Topic: My Camera arrived today... what now?
Replies: 108
Views: 28421

Re: My Camera arrived today... what now?

As soon as the raw h264 bitstream leaves your binary you lost all timing information attached to the frames. This really properly needs a real streaming solution, not just netcatting a bitstream across the network via a fifo. That's at best a poor-mans streaming solution. Either this has to get pac...
by towolf
Tue May 14, 2013 1:04 pm
Forum: Camera board
Topic: My Camera arrived today... what now?
Replies: 108
Views: 28421

Re: My Camera arrived today... what now?

After reading the documentation for setting up a network stream, and then going to set up mplayer on Windows (which was not really good from first empressions and experimentation) I thought you could use something else to stream the video to VLC in windows. I know this is only possible if you can a...
by towolf
Mon May 13, 2013 2:33 pm
Forum: Camera board
Topic: My Camera arrived today... what now?
Replies: 108
Views: 28421

Re: My Camera arrived today... what now?

Anyone else able to order?
by towolf
Mon May 13, 2013 2:32 pm
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 443
Views: 276028

Re: Foundation Camera Board information

jbeale wrote:...oh, "vbitrate=800"
People should seriously stop using mencoder. It’s properly unmaintained. Go ffmpeg.
by towolf
Mon May 13, 2013 2:18 pm
Forum: Camera board
Topic: My Camera arrived today... what now?
Replies: 108
Views: 28421

Re: My Camera arrived today... what now?

Got this message half an hour ago: We are extremely pleased to announce that the Rasberry Pi Camera Board will be available to order from 14th of May, and we are telling you 24 hours before anyone else! To place your order, please visit www.farnell.com/pi on 14th of May. Can’t click order on de.farn...
by towolf
Tue Apr 02, 2013 1:46 pm
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 443
Views: 276028

Re: Foundation Camera Board information

Actually, the FPS isn't stored in H264, so you will need to add a container round it that specifies the frame rate - not managed to get that to work yet (using avconv, might be using the wrong playback). So when you play back the 2fps recoding it plays back at the default rate of the player (OMXPla...
by towolf
Sun Mar 31, 2013 6:28 pm
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 443
Views: 276028

Re: Foundation Camera Board information

Looks promising. Any chance of separating out input fps and output fps for video mode? (i.e., capture at 2fps but store 30 fps in the file). Also how does the exposure time interact with the fps? Is the video encoded as variable frame rate? If it spits out raw h264, how is the framerate dealt with w...
by towolf
Thu Mar 28, 2013 11:50 am
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 443
Views: 276028

Re: Foundation Camera Board information

JDWraspberryPi wrote:

Code: Select all

$ vcap video.mp4 &
$ kill `ps | grep "grep" --invert-match | grep "vcap.sh video.mp4" | head -n 1 | awk '{print $1}'`;
That a nice pipeline you have there.

Did you ever hear of `pkill`?

And anyway, you'd want to respond to SIGHUP to write out the file.
by towolf
Thu Mar 28, 2013 11:48 am
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 443
Views: 276028

Re: Foundation Camera Board information

The 2fps mode in video is pretty good for that as well and actually give better compression at low bit rates. That's what I mentioned earlier to you, right? A video codec exploits redundancies in between frames compared to just storing independent JPGs (i.e., equivalent to MJPG). So with a video co...
by towolf
Sun Feb 17, 2013 8:17 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 82113

Re: Camera Interface Specs

Ah, I think I’m in the wrong thread, sorry.

The advantage is that you’d get a ready made highly compressed movie that exploits the redundancies between frames.

At 15 MBit/s you could fit a whole year onto a 32GB SD card.

I reckon the encoder could discard frames (modulo 60)?
by towolf
Sun Feb 17, 2013 5:51 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 82113

Re: Camera Interface Specs

What does that mean? It only outputs files at 30 fps? Because the fps in the output is not much more than a number in a header. I’m wondering if I can do very slow timelapses, over a year for example.
by towolf
Sun Feb 17, 2013 5:42 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 82113

Re: Camera Interface Specs

Will it be possible to capture at, say, 1 frame per minute and pipe that directly to the H264 encoder?

That would be seriously cool. Or are the frame rates fixed like in webcams?
by towolf
Thu Feb 07, 2013 3:26 pm
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 443
Views: 276028

Re: Foundation Camera Board information

But it would be cool to have as much access to the internal knobs, calibration settings, and modes of operation as possible. Webcams are often frustrating because of the automatisms. For example they change the framerate depending on the auto-exposure. But then you cannot get precise timestamps of e...
by towolf
Mon Feb 04, 2013 9:07 pm
Forum: Deutsch
Topic: Zwei Raspberry Pi's durhc GPIO verbinden ?
Replies: 4
Views: 3054

Re: Zwei Raspberry Pi's durhc GPIO verbinden ?

Via UART kannst du serial-artige Kommunikation anstellen. Tx Rx überkreuz und GND mit GND verbinden.
by towolf
Sat Jan 26, 2013 5:39 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 82113

Re: Camera Interface Specs

> I wanted a head start on high frame rates as people have been asking for it.

Yes please, as high as possible, even if its at 320x240.
by towolf
Fri Jan 18, 2013 2:15 pm
Forum: Networking and servers
Topic: Sending mails with the Raspi
Replies: 15
Views: 16953

Re: Sending mails with the Raspi

To send myself email from under-the-bed server I use ssmtp. It’s the thinnest email sending solution I found on Debian. I use Gmail’s smtp for this. It basically directly passes the emails on to Gmail. config file: $ cat /etc/ssmtp/ssmtp.conf AuthUser=<username>@gmail.com AuthPass=<password> FromLin...

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