Raspberry Pi Forums

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Did you get the HTML output working?

Wondering if there is difference between:

print "Content-type: text/html\n\n"

and

Code: Select all

print "Content-type: text/html"
print

https://docs.python.org/2/library/cgi.html

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You might want to look at the Python sub-forum and search for "omxplayer dbuscontrol" - there are lot of people controlling omxplayer from python scripts... Also it should be possible to get the result code of the call to start the player (usually on Linux it should be zero for success), so you coul...

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Of course it has to be Python you heretics - this is the holy Python subforum

To me it looks like the wording of the original question suggests the OP already has some Python code to turn on the pin ...but I may be wrong or course.

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Sorry, not quite sure what you mean with that and the earlier comment on already using PyOpenGL... Did you install PyOpenGL onto a Raspberry Pi? Did it work? Did you try the tutorial? Did it produce any output? The intro http://pyopengl.sourceforge.net/context/tutorials/shader_intro.html says it "It...

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Looks like PyAudio does not have functions for controlling the volume. Could possibly use the amixer command-line tool and subprocess call

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If you already know how the create and serve the webpage and want to use Python for the GPIO control, best to find out how to call a python script through CGI on your webserver.

Or you could implement the whole thing in Python https://docs.python.org/2/library/simplehttpserver.html

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Well, as I said I am not that familiar with omxplayer so not sure if it is possible, but it seems to me that you open the two player to two different display layers (using the layer parameter) - maybe there is a way to change this, so that you could start them both and just switch the active one on ...

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And in fact the subprocess module is meant to be used to replace the os.system.

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Using echo for debugging is a brilliant idea when calling os.system (or similar) - especially if the command involves environment variables it would be the only way to get the actual command string - for example: os.system("echo somecommand $HOME/somesubdir/somefile") Quite often the python print is...

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My problem is the lack of information about OpenGLES with Python, I need some guides to teach me this, I have already used PyOpenGL but only with deprecated functions. Are you saying this http://pyopengl.sourceforge.net/context/tutorials/index.html is not any good? I have been thinking of learning ...

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This http://picamera.readthedocs.org/en/rele ... o-a-stream ?

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Maybe this http://picamera.readthedocs.org/en/rele ... ork-stream or this http://picamera.readthedocs.org/en/rele ... o-a-stream helps?

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I am afraid Ken did miss the point of the Popen and subprocess.call calls being completely separate: start player 1 (Popen) command player 1 to play (subprocess.call) wait command player 1 to stop (subprocess.call) start player 2 (Popen) command player 2 to play (subprocess.call) wait command player...

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Does that code work (give close enough proper measurements)?

If so, you should look at creating a function out of it, return the measurement instead of just printing it and call the function from a loop in a main program ( https://docs.python.org/2/tutorial/cont ... -functions )...

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As far as I understand the SPI dev module tries to open a file - most likely with parameters (0,0) the file would be /dev/spidev0.0 - and the error looks like there is no such file. Can you see the SPI device? Running in a console: ls -al /dev/spi* Did you do all the steps from http://www.raspberryp...

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Not quite sure if you want to read feeds from others or create your own feed outwards? Both are definitely possible - there are tweet.bot dinosaurs and what not just a google search away http://www.raspberrypi.org/boris-the-twitter-dino-bot/

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Maybe take a look at PyGame http://www.pygame.org/docs/ref/movie.html

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jeffboyce wrote:That should be noted somewhere in a good reference for others to find.

Might be worth logging a documentation issue here https://github.com/waveform80/picamera/issues

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I wonder if it is this Tcl/Tk (which apparently IDLE uses as the UI toolkit) issue with internationalisation still there http://equi4.com/pub/am/starkit/2005-Ja ... 02279.html - a bit more recent find http://bugs.python.org/issue3493

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Difference between Python 3.2 and 3.4 should not be so big the instructions would not work using 3.2 too. In fact http://www.raspberrypi.org/forums/viewt ... 48#p229682

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I wonder if some of this work has caused your issue: https://github.com/raspberrypi/linux/issues/679 Something has definitely changed as I ran into issues with my Linux framebuffer code using KDSETMODE and FBIOPUT_VSCREENINFO http://www.raspberrypi.org/forums/viewtopic.php?f=67&t=19073&p=678878#p678...

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I assume you want to update the screen so often that it is going to cause high CPU usage which ever way you implement it.

If you want to avoid X, you might want to look at the hw accelerated stuff like one of the 'hello world' examples in Raspbian at /opt/vc/src/hello_pi/hello_font

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Maybe the people following the GAMBAS thread under 'Programming/Other languages' http://www.raspberrypi.org/forums/viewt ... =34&t=6182 could help?

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This sounds like something to do with using OpenMAX - there is a separate sub-forum http://www.raspberrypi.org/forums/viewforum.php?f=70 where you may find better educated audience.

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After booting, "fbset -depth 8" (or a similar command) must be run, otherwise fbtestXIII displays a blank screen. Finally managed to find the cause for the blanking after boot: the changes in the framebuffer driver seem to require the calls to KDSETMODE to be inside the FBIOPUT_VSCREENINFO calls......

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