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by gasguru
Wed Nov 27, 2013 5:31 pm
Forum: Camera board
Topic: Minimizing latency with streaming encoded h264?
Replies: 38
Views: 14885

Re: Minimizing latency with streaming encoded h264?

The camera runs on the GPU, and is controlled (at a distance) by the Arm side code (raspistill/vid). The ARM code is OSS, the GPU code is not. ..uhuh, long term you guys face competition from GPL GPU people, just tell the bossy ones to watch how e.g. the nouveau driver performance, _develops_ over ...
by gasguru
Wed Nov 27, 2013 4:12 pm
Forum: Mathematica
Topic: Mathematica license terms
Replies: 6
Views: 5783

Re: Mathematica license terms

My definition of basic research is research far away from commercial application, only for the sake of knowledge. ..like Wilhelm Conrad Röntgen's research on radiation, agreed. As example in Germany basic research like it is funded mainly through DFG, Max Planck or Helmholtz. (Example for US fundin...
by gasguru
Tue Nov 26, 2013 9:20 pm
Forum: Camera board
Topic: Minimizing latency with streaming encoded h264?
Replies: 38
Views: 14885

Re: Minimizing latency with streaming encoded h264?

..edit: I hit the "You may embed only 3 quotes within each other." ;o) ..is there a way to reset the camera without rebooting the rPi? ..yes or no? No. ..come on, I've got grey beard. ;o) Are you saying the camera runs in kernel space and with the camera modules compiled in statically, or somesuch?...
by gasguru
Tue Nov 26, 2013 7:37 pm
Forum: Mathematica
Topic: Mathematica license terms
Replies: 6
Views: 5783

Re: Mathematica license terms

Hi, Can someone clarify the license terms, especially what "license to use the Product solely for personal or educational purposes " means? Especially which use cases are allowed for example: a) Using it for university students in a computer pool for their studies. (This is probably allowed, right?...
by gasguru
Tue Nov 26, 2013 6:31 pm
Forum: Camera board
Topic: Minimizing latency with streaming encoded h264?
Replies: 38
Views: 14885

Re: Minimizing latency with streaming encoded h264?

..easy now, we may be barking up the wrong tree, I only get the camera stuck when I go beyond 1080p heights, and it's gst's h264 pipeline that does all the whining. ..is there a way to reset the camera without rebooting the rPi? ..yes or no? If you go above 1080p then you switch to a stills camera ...
by gasguru
Sun Nov 24, 2013 11:58 pm
Forum: Camera board
Topic: Minimizing latency with streaming encoded h264?
Replies: 38
Views: 14885

Re: Minimizing latency with streaming encoded h264?

I should emphasise the on a direct 100bT ethernet connection between a Pi and a desktop, I was seeing almost no latency at all anyway. Certainly only couple of frames worth. jamesh, I have read many of your very helpful posts regarding the camera setup, and do recall one describing your setup. I ha...
by gasguru
Sun Nov 24, 2013 11:45 pm
Forum: Camera board
Topic: Minimizing latency with streaming encoded h264?
Replies: 38
Views: 14885

Re: Minimizing latency with streaming encoded h264?

There is a known issue with -ex verylong where it will lock the GPU - try another setting. Also, setting an ex mode may will contravene the fps requirements on the video, interactions between the two are a bit undefined. I actually found the problem on Friday, so will be releasing a fix next week. ...
by gasguru
Sun Nov 24, 2013 6:02 am
Forum: Camera board
Topic: Minimizing latency with streaming encoded h264?
Replies: 38
Views: 14885

Re: Minimizing latency with streaming encoded h264?

..chk http://wiki.oz9aec.net/index.php/Gstreamer_cheat_sheet for ideas, I probably messed up something, I got more lag with udp, which makes absolutely zero sense to me.

..update: I messed up my response to CopterRichie here, appearantly I need to quote people to preserve threading.
by gasguru
Sun Nov 24, 2013 5:54 am
Forum: Camera board
Topic: Minimizing latency with streaming encoded h264?
Replies: 38
Views: 14885

Re: Minimizing latency with streaming encoded h264?

The HW limit is higher than the SW limit, except in some cases (which we dont hit here as the sensor is not high enough resolution). Any stutters won't be down to the camera ISP - that can handle 25Mbits/s H264 1080p30 encode no problem. I don't know about height limits when encoding. I guess you c...
by gasguru
Sat Nov 23, 2013 2:50 am
Forum: Camera board
Topic: Minimizing latency with streaming encoded h264?
Replies: 38
Views: 14885

Re: Minimizing latency with streaming encoded h264?

..one way: on your rPi: /opt/vc/bin/raspivid -n -g 180 -ex verylong -ev +0 -vs -rot 180 -t 0 -h 960 -w 1920 -fps 45 -b 1700000 -o - | gst-launch-0.10 -v fdsrc ! h264parse ! rtph264pay config-interval=1 pt=96 ! gdppay ! tcpserversink host=192.168.1.191 port=5000 ...or: /opt/vc/bin/raspivid -n -g 180 ...

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