I use livepkgr to show liveevents to my viewers. Now I'd like to show to them how many people now watch the live event.
Please advise me.
Many Thanks.
Number of connected users available in FMS. Supposing you can customize your player, then it is possible to call FMS for connected users each 10 seconds and show number in player.
Related
I'm trying to set up my LabView VI + my USB 6001 I/O box to be able to read multiple independent voltages at once, while also outputting a single constant voltage.
I've successfully gotten my USB box to output the voltage I want while reading back a single voltage, but so far I've been unable to read back more than one voltage (and if I do, the two voltages seem to be co-dependent on one another in some way).
Here's a screenshot of my VI:
Everything to the right of the screenshot window should be unimportant to the question.
If anyone is curious, this is to drive multiple LVDT's and read back their respective voltages.
Thank you all for your help!
Look at your DAQ's manual, especially the pages I noted below.
http://www.ni.com/pdf/manuals/374259a.pdf
Page 11
All the AI channels get multiplexed, and the low-side reference can be switched (RSE vs. differential). So the two channels you're sampling require both of those to switch. It might be a settling issue where the ADC is taking a sample before the input value is stable.
To verify this, try using using the same low side (differential or RSE) on both channels. Also try slowing down your sample rate (but your 1 kHz should already be slow enough...).
Page 14
Check this to make sure you have everything connected and grounded correctly.
Page 18
Check this for more details about switching between 2 sources quickly.
Perhaps you could try it using the Daqmx express VIs:
http://www.ni.com/tutorial/2744/en/
I'm working on some home automation programs and one of the things I want to be able to do is detect when my 4th generation Apple TV has woken from sleep. This will generally only ever happen when someone pressed a button on its Siri remote to wake it up.
I have a PC (connected to the same TV as the Apple TV) that has a Pulse-Eight USB-CEC adapter, so naturally the first thing I tried was using CEC to determine when the Apple TV is awake. Unfortunately it's not reliable, since monitoring the Apple TV's power status to see when it wakes up produces false positives. (I should note that I do not have "Control TVs and Receivers" enabled on the Apple TV, and can't turn it on for the particular project I'm working on because I need the Apple TV to not change the TV's input.)
I'm trying to think of some other way to do this. I'm open to any possibilities, including things like:
Making use of private APIs on the Apple TV
Running an 'always on' program in the background of the Apple TV that sends a signal when the Apple TV wakes up, if that's even possible. (I suspect that it isn't.)
Monitoring the bluetooth communication between the Siri Remote and the Apple TV, if that's possible
Somehow filtering HDMI-CEC commands so that I can turn on 'Control TVs and Receivers', allow the Apple TV's CEC commands for turning on and off the TV, and exclude commands for changing the TV's input.
Any other method, no matter how hacky or ridiculous, as long as it works!
Does anyone have any suggestions? I'm running out of things to try!
I tried to post below on apple discussion / support communities but was told i don't have the right to post this content. Maybe someone in this group can succeed in doing it:
Apple TV 4 CEC integration is great when it works, but it doesn't work all the time and not with all the various equipment out there, you can do a search across forums and you will see lots of unhappy users. I would like to use a raspberry PI to detect when my AppleTV goes to sleep and wakes up and programmatically turn my tv on or off using its RS232C or custom CEC commands.
I used a bonjour services explorer and compared every single result between sleep and on states and there are no differences whatsoever. I would have expected Apple to welcome such automation projects and make this information readily available with a variable such as status: sleep or status: on.
Is there a way I could tell the two states apart via the network connection?
If not, could one build a TvOS app which runs on the background and makes this information available to clients somehow?
I finally found a method that seems to work consistently. This method is incredibly hacky and not at all the sort of way I'd prefer to do this, but it's the only one I've found so far that works consistently.
I have taken an old USB webcam and affixed it to the front of my Apple TV so that its lens is directly in front of the Apply TV's front facing light. Whenever the Apple TV is asleep, I simply check for the light turning on by taking images from the camera and analyzing their average luminosity. Since the lens is right next to the light, when it turns on it'll create a huge blown out white circle in the image that's incredibly easy to detect.
As long as the Apple TV is asleep, the light turning on seems to indicate 100% of the time that it has woken up. I have yet to find a single incident of either a false positive or false negative.
Since pressing buttons on the Siri remote causes this light to blink, this also means that I can detect buttons being pressed by looking for changes in the light while the Apple TV is awake. It's not 100% accurate, since some button presses are faster than the frame rate of my crappy old USB webcam, but it works well enough.
I would vastly prefer to find a better method of doing this, like making a request over the LAN to the Apple TV where the response clearly indicates it being awake or asleep, but so far it doesn't look like that's possible.
Here I am, six and a half years later, and I've finally found a better way to get the power state of my Apple TV.
I can simply use pyatv, which has a function named power_state that returns the Apple TV's current power state.
I have multiple webcams hooked up to my raspberry pi and they are compatible and work. I want the raspberry to take a picture every 5 seconds (with every camera), save it to /var/www/picture.jpeg (picture2.jpeg and picture3.jpeg) and repeat overwriting the old images. Im not quite sure how to achieve this and need help!
Thanks!
You may use guvcview or motion, I forgot with which argument you need to run, but just lauch it with --help and you will get all the information. Actually, I've never tried with more than onw camera, but I think that it is possible to do it. You may have to search. But for the delay, there is no problem with those to programs.
I am trying to write an application(I'm a gui first timer) for my son, he has autism. There is a video player in the top half and a text entry area in the bottom. When letters are typed sounds are produced to mimic the words in the video.
There have been other posts on this site in regard to playing sounds on key presses, using gstreamer as a system call. I have also tried libcanberra but both seem to have significant delays between sounds. I can write the app in python or C but will likely do at least some of it in C.
I also want to mention that the video portion is being played by gstreamer. I tried to create two instances of gstreamer, to avoid expensive system calls but the audio instance seemed to kill the app when called.
If anyone has any tips on creating faster responding sounds I would really appreciate it.
You can upload a raw audio sample directly to PulseAudio so there will be no decoding and (perhaps save) extra switches by using the following function from Canberra:
http://developer.gnome.org/libcanberra/unstable/libcanberra-canberra.html#ca-context-cache
The next ca_context_play() will use it.
However, the biggest problem you'll encounter with this scenario (with simultaneous video playback) is that the audio device might be configured with large latency with PulseAudio (up to 1/2s or more for normal playback). It may be reasonable to file a bug to libcanberra to support a LOW_LATENCY flag, as it currently doesn't attempt to minimize delay for sound events afaik. That would be great to have.
GStreamer pulsesink could probably get low latency too (it has some properties for that), but I am afraid it won't be as lightweight as libcanberra, and you won't be able to cache a sample for instance. Ideally, GStreamer could also learn to cache samples, or pre-fill PulseAudio...
Apologies if this question has been asked before. After lots of searching, I could not find the answer anywhere.
I was just reading about something called a Record Management System for J2ME. This can be used so a MIDlet can store data reasonably permanently, even after it has been closed or the phone has been turned off. However, what I don't know is where these records actually get stored. Consequently, I find some things about records confusing.
To give an example, let's say I have a game of some sort on my phone. This game is a J2ME MIDlet and it stores my highest score in a record, so that way each time I play the game, it'll display what my highest score was. If I were then to copy the jar file for this game from my phone to another phone, would the record storing the high score also get copied to the other phone, or would no record exist yet on the other phone?
Also, another question about records while I'm at it. If I uninstall a MIDlet that stores records from my phone, do the records get deleted automatically?
Thanks!
when you are sending your application to one mobile to other then only application will be
send not its Records
Records are connected with its midlet so if you are installing that application on other phone
you will get blank record store
if you are uninstalling your midlet from mobile it will automatically remove all the record store in it.
so next time when you start application you will found none of your previous record.