Logitech C920 Full Hd
Yoshi Heffernan
I just purchased a Logitech C920 webcam to use with an external monitor for my Windows 11 laptop. The video works great, but the microphone isn't working. Zoom detects the webcam microphone and will use it as its audio source, but the result is silent. This is true both using the Test Microphone function in Settings as well as in a meeting. The webcam microphone works fine with the Windows Sound Recorder app, so it's not a hardware issue. Any suggestions for how to make it work in Zoom?
I've seen a lot of issues with Windows 11 audio. Check out this Community post to see if that helps... if they don't work for you, please search here for "Windows 11 sound audio" or variations and see if you can find something specific to your setup.
Another thing I'd check is the "Allow applications to take exclusive control of this device"... mine is checked, and everything works fine, but if you have anything in the background that might be grabbing the mic, unchecking this might help:
i used to have a c920 and now have a logitech brio. both worked fine with win 11 and zoom. please check the microphone volume setting. i have mine set to automatically adjust microphone volume. please see attached screenshot.
Looks fine to me. Next would be get the logs, the command to run would be journalctl -u webcamd, to look and see if there is an issue displaying that resolution.
2304x1536 sounds off to me, are you sure this is a resolution that the camera supports? You could try 1920x1080, a more common one to check it is picking up the settings, then move on from there?
I want to max out the resolution. I like to edit in a little movement in Premiere Pro, so the larger the image the more options I have for applying some movement in post.
Here is the article I read that talked about the c920 and it's sensor size. -how-to-increase-image-quality-when-taking-images-through-image-acquisition-toolbox-beyond-available
No guarantees that the driver is able to read that size I would say. If you run v4l2-ctl --list-formats-ext you will get every resolution that the camera supports listed. If it's not there, it won't work. Might be worth verifying with the logs and testing at lower resolutions that you are configuring it correctly.
I am trying to get Logitech C920 webcam to work in a Citrix VDI deployment. I was not able to get the HDX webcam redirection to work. I was able to set the USB redirection to globally deny and then allow my webcam and a few other devices to function as needed. When trying to use video in MS Teams or other UCC platform, the video starts well and then starts to scramble and jump without stopping. If I unplug the camera and plug back in, it will start normal again, but quickly revert to the jumping. Has anyone see this and are there any recommended steps? I am trying to make this work for Teams/Webex/GTM/etc. I am running 11.05.133 of Igel OS on UD6LX devices.
I have followed all of these and are still having the issue The HDX webcam redirection is not working with my cameras. I am having to fall back on native USB redirection to have the Citrix session see the cameras.
I realize that this may or may not show as optimized. I know that it used to be that only the 32-bit version was able to be optimized with linux clients for Citrix. I am not sure if this is the case still or not, but regardless of being optimized, I just attempting to get the video to work if possible.
I just went through the new IGEL guide and followed all of the steps and my camera disappeared once again. I then removed the policy for webcam redirection and it came back. I just performed a test call and the image seems more stable, but I will need to test more to see if the images continues to bounce and go crazy. I saw where there were some more settings in registry added and some different items for codec that I missed originally.
I will give these a look! Thanks! I am running then 2103 baked into 11.05.133. My Citrix environment is running 1912 CU2. Yes, all settings have been cleared and the UMS setting is there and enabled. As noted earlier if I move a running session from the Igel client that is not working to a Windows or Mac, the optimization takes effect and starts working. The session is optimized and using the same c920 camera.
My guess is that there are no drivers installed for the Logitech c920 on my pi, but I'm not sure. How would I download drivers or what should I do to be able to use my webcam? The c920 is on the list of approved webcams, I have nothing else being powered by my pi so I should have enough power output to take a simple picture.
I spent a number of hours recently with my C920 and a Raspberry Pi 3 recently to make a babyCam that I could stream within my home network. I may be able to shed some light but also provide documentation and experience to other users.
The C920's H.264 encoder is good but its rate seems only works at 3 Mb/s average bit rate no matter what the resolution. However, I tend to use 720p, that is 1280x720 because a 16:9 aspect ratio makes sense for the application.
On testing the camera's audio, I recorded and listened to the WAV file I recorded to the Pi's local storage. Unfortunately with this recipe, you'll need to Ctrl-C after 10 seconds. Cleanup the extra record files. So I can record good sound from the camera with this command to a wav file but I can't make arecord stop at 10 seconds:
Logitech provides a Camera Settings app (for Mac OS in our case) that you can install to modify the way the camera sees things. (Download from > logitech.com/support/C930c ) Download it and install it on the computer, then connect your camera and fix its settings.
I have a working VI which grabs images. Everything works except that when I went to do manual exposure I can set the "exposure mode" attribute to manual and then change the the exposure values to something in the allowed range it sometimes changes it back. That is I'll set it, and when I take the image about half of the time it is with the exposure I set and half the time it has changed it to correctly expose the image and I can read back the new value. The camera still says it is in manual exposure mode though.
I've also been able to replicate this in the measurement and automation explorer. That is, I set exposure to manual mode and then drag the slider to some random exposure value, but the camera will change it back while staying in manual mode. It really doesn't make sense and I thought I'd check if anyone has experience with this.
Offhand, it sounds like the Logitech camera is not "taking" the "Manual Exposure" setting. It could be something you are doing (which we can't evaluate because, as so often happens in the Forums, you failed to post your code, so even if we had the identical camera, we wouldn't be able to see if we could duplicate your finding), or it could be the camera (in which case you need to contact Logitech).
For anybody coming across this post, the issue was that for this particular camera "IMAQdx Start Acquisition" will helpfully try to autoexpose and autofocus the camera before you acquire the image. The camera does this even when in manual exposure mode. This was fighting with me trying to change exposure myself. I was able to fix it by breaking out the IMAQdx Grab VI into it's components and dropping my exposure setting code in between.
Actually, using q4vl2 on linux, I'm getting the exposure take immediate effect on the camera stream as I use its exposure time slider. With what I'm pretty sure is a logitech C920 from comparing the looks of it to online images. And it clearly sticks at the exposure level that I set it in real time. So it's likely not a limitation of the hardware IMHO. Unless they had multiple firmware versions for this model.
I have the logitech C920 webcam. Whenever I open cheese the webcam works fine. However whenever I exit cheese the webcam won't stop running. Afterwards I can't run any apps with the webcam because it's being used. How do I fix the bug or at the very least how do I turn off the webcam when I'm done using it?
UPDATE: So I decided to run top and noticed that cheese was still running. I killed the PID and that shut off the webcam. So now my question is how do I properly exit cheese? I'm using the i3 window manager and used ctrl - Q, but I don't believe that's completely exiting cheese. Is there another way to exit the program?
Sorry, cannot reproduce. I use Cinnamon and used Ctrl-Q and I could successfully relaunch it. My built-in camera also uses the "uvcvideo" kernel module and I see the usage count successfully drops to 0 as I close Cheese.
When I bought my first 2 C920 I had to install specific logitech drivers in order to have a real 30 frames per sec, which wasn't a problem last year : with the "lws280.exe" from logitech (old logitech capture software) I could install drivers from 22/10/2012 and obtain a fluid signal. It still works with both webcams I've bought last year, but when I connect my new C920 :
- for an unknown reason I can't install these 2012 drivers : the logitech 2012 installer tells me that an "incompatible webcam is detected"... I can't find why (I've been trying an other C920 that I bought last month : same problem, I resent it thinking the webcam had a problem but with this new trial it seems the webcam isn't the problem).
The only solution I found is to install the last version of the logitech "capture" software, in which I can visualize a fluid 720p image. It generates a "logi capture" virtual input that I see in Isadora. But as soon as I click on "start live capture", Isa crashes... I've just been sending a isa crash report that occured when I clicked on "start live capture"...
- But if I close "logitech capture" software and choose directly "HD Pro webcam C920" as an input in 1280x720px I experience the same problems I described earlier : no fluid image, looks like the framerate is 12fps, while the soft indicates 30fps. If I put it in 640x480px the image becomes fluid (same in Isa when I choose directly "HD pro webcam C920" as input).
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