Recently, my computer has been acting rather strange. All audio is muted and any time I try to watch a Youtube video the player ends up crashing. I can't seem to find anyone who has had a similar problem but I think I may have found some kind of clue: While trying to run a project I made in C++/python for the Panda3d engine I kept on getting these errors:
AL lib: DoReset: Failed to initialize audio client:0x8889000f
:audio(error): alcCreateContext(_device,NULL): Invalid Device
:audio(error): OpenALAudioManager: No open device or context
I have no idea what this means as I am not very knowledgeable of computers.
it is hard to say a lot without more details, but it appears as though the computer is not detecting your audio device. Try right clicking on the computer icon in metro, and selecting manage. Go to the device manager and see if there are any devices that have a yellow exclamation point. if they do, install drivers from the vendor. If not try updating your audio drivers, and restarting.
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I've recently run into an annoying issue, my windows10 sound is not working at all. I've tried to reinstall the drivers, manually start sound services, but none of the above fixed the issue. What is really strange about it is that the PC seems to detect that the drivers are installed properly, the speaker icon has no x mark, instead it displays the volume bar, but nothing comes out of the speakers. tried the speakers on another computer and can tell its not the speakers that are faulty.
Any helpwould be much appreciated. Thank.
I reinstalled the audio drivers, manualy restarted the audio service, checked motherboard bios, nothing works
I am building a Bluetooth audio receiver as an embedded system with the CHIP sbc (single board computer) from getchip.com. Pretty similar to Raspberry Pi, runs Debian Jessie, too.
I am using the onboard 3.5mm jack as an audio output. I configured PulseAudio to receive the Bluetooth audio and redirect it to the ALSA sound driver.
Everything works flawlessly except for static noise on the output.
Directly after boot there is a medium loud sum in the few hundred Hz region.
It´s always in the background, even if I play something via bluetooth or locally via CLI.
The interesting part is that it disappears after exactly 10min and 10sec after powerup, so I think exactly 10min after the startup of PulseAudio or ALSA.
I couldn´t find a reason for it.
I tried the tsched=0 fix in /etc/pulse/system.pa
I unloaded the module suspend-on-idle in /etc/pulse/system.pa
And by the way, I´m running PulseAudio in system-mode, as I´m using it as an embedded system and not a multi-user configuration. I hope I get help from you anyway ;-)
Maybe you have an idea where this noise could come from?
It has to be some sort of software configuration issue, otherwise it wouldn´t disappear after exactly 10mins.
I´ll add the PulseAudio and ALSA configuration files later this day.
Thanks in advance!
Fortunately I solved the problem on my own:
The C.H.I.P. from NextThing has a 3.5mm TRRS jack, which does not only output stereo audio but component video as well.
Now if you plug in a standard 3.5mm jack, the ground pin does does interfere with the component video connector.
Thats why there was this humming noise on the audio output. And thats why it disappeared exactly after 10mins, because the screen idle time is 10min, I think.
So I have to admit, that it was indeed not a programming question as it was a connection issue. Thanks anyway for the quick answer!
Can you tell me a simple way or link to software that I can use to block flash from uploading images from my computer in chat sites to other users???
I have disconnected and removed my built in webcam but it still streams images, possible
because I have the HP Pavillion connected to a PLASMA Monitor which confuses me because it does not have a camera on it!!!
I have research possibility's of stopping this but found no answer, I will really appreciate it if you would be so kind to explain a way to stop or block this from occurring?
Flash will usually throw a 'allow/deny' box up at you if it wants to to access any other hardware like your webcam.
So just don't 'allow' it.
You can check if you have a webcam via your device manager.
Assuming you're using Windows 7:
Press start,
Type "device manager"
Press enter and search through seeing if you can find your webcam. If there is one it should be under 'sound video and game controllers'
If you do find it. Right click on it and 'disable' it.
Good Luck.
This has been a plaguing issue for the Raspberry Pi install of Raspbian (Debian Wheezy) since it was first built. Talking directly to the Raspberry Pi foundation and the Raspbian team has given me no luck.
The issue itself is that the DAC doesn't initialize until it starts playing a song. It then will turn itself off when done, causing another pop. When using this for a pure music player it is infuriating to say the least, especially when the pop is loud.
I have heard this on VLC, MOCP and MPD. This has been covered in the Pi forums, but no answers are found: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=38&t=8783
I turn to you at Stack Overflow to see if there is a way to solve this issue. My idea is to initialize it at start-up so the pop only happens when it boots up, though I don't know how to control the ALSA to do that.
Hopefully a solution can be found.
Thanks!
I've experienced the same crackling and popping noises on the Raspberry Pi's analog output when using mpd. The problem is also discussed here: https://github.com/raspberrypi/linux/issues/128
Your idea of configuring the audio hardware to be initialized only once at boot time is exactly what I did to solve the problem. It's possible to do this using the PulseAudio sound system, which works as a proxy between the audio hardware and programs that want to output sound. For example, audio players like mpd can be configured to use PulseAudio as audio backend.
PulseAudio has a configuration option (module-suspend-on-idle) that configures audio hardware sleep. Disabling audio hardware sleep fixed all crackling and popping noises for me.
I've outlined the necessary steps in closer detail on my blog: http://dbader.org/blog/crackle-free-audio-on-the-raspberry-pi-with-mpd-and-pulseaudio
I have the same problem and resolution is to use either USB audio or HDMI audio output (however converting hdmi audio to analog audio is not easy, converter >40$). It is caused by broadcom firmware. They were saying on rpi forum that it is on the list, but no one knows when it will be really fixed ...
Update: I have tried Creative Play! USB audio, it is the same, however the "click" is not that loud. So it is not 100% solution, we have to wait for the fix.
By using the Aureon Dual USB sound card I got zero popping from my raspi. Before I had popping at every song.
I have read that using the Aureon is impossible without limiting the usb ports to version 1.1, but this was not the case for me. It worked out of the box. One slight problem remains, I cannot insert the sound card when the raspi is on, it will reboot. But that's not a problem for me, I never remove the sound card.
My raspi runs raspbian wheezy and plays music via mpd and an nfs share.
I recently downloaded a barcode reading application for my phone, an LG KU990i (AKA the Viewty) However, there's a problem that renders the application nearly useless: the Viewty has 2 cameras -- the main one, and a secondary camera located on the face of the unit -- and it is the secondary camera that is unfortunately set as the phone's default video capture device. As you can't point the secondary at anything and see what it's pointing at at the same time, it makes it a bit difficult to snap a barcode!
According to the JSR-135 spec, it is possible to specify a video capture device other than the default... if you know the device name. This does not appear to be documented anywhere on LG's Web site, nor does the JSR-135 spec describe any way of enumerating the devices on a phone... or is there? Failing that, are there any naming conventions for video devices commonly in use that LG might be using?
I've logged a ticket with LG, but as it's an old device, I don't imagine them breaking their backs in getting back to me... I should also point out that this is purely for my own curiosity so no-one here should feel obliged to break their backs either!
As far as I know there is no way to get list of all available catpure:// urls.
All urls I know:
capture://image,
capture://video
capture://devcam0
capture://devcam1
Source:
http://www.forum.nokia.com/info/sw.nokia.com/id/bc00e4ce-7df3-4527-962c-d39843a808d0/MIDP_Mobile_Media_API_Support_In_Nokia_Devices_v1_0_en.pdf.html
LG responded to my support ticket. Apparently, it's not possible to access the primary camera on the Viewty from Java, making it pretty much useless for barcode scanning. Answer reproduced here for search engines.
You support ticket has been answered. Please visit the LG Mobile Developer Network and login to check the answer at [My Page > My Tickets].
KU990i default video capture device is the secondary camera
Answer :
Hi,
KU990i have to Two camera module
differently.
Main camera using Joran chipset and
sub(front camera) using Qualcomm
chipset.
Joran chip doesn’t supported JSR135.
Therefore, we couldn’t supported to
the JSR135 using for main camera.
(it is H/W limitation)
It was inform to operator already and
we remember operator was confirm it.
So that, we only supported sub camera
for JSR135.
BR,