You can also use the C920 as security cam thanks to the motion-detection mode, which can come in handy if you want to keep an eye on your desk. The software features a number of backgrounds and avatars to add a bit of fun to your videoconferencing. If you use this at a desk, you'll likely need to use it only once, but users on the go might find themselves relying on these framing options more often. The app allows users to zoom in and out with the camera, as well as pan left and right. The company touts support for Mac OS X, Chrome OS and Android, but those operating systems don't offer this program. The C920 is compatible with Logitech's Webcam Software for Windows. However, the C930e had superior noise cancellation, while the C310 didn't do much to dampen background noise. Though I recorded my chat in an open-office setting, there wasn't a ton of ambient noise from nearby co-workers. Recorded with the C920's built-in microphones, the audio in my sample video was loud and clear, but a little flat. A cheaper, 720p camera, the Logitech HD Webcam C310, was grainy in comparison and wasn't as sharp in low light. A photo I took with the 930e made my light red shirt look more like a cherry red. 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: arecord -d 10 -t wav -D plughw:CARD=C920,DEV=0 -f cd -max-file-time 10 recordcam.Logitech's business version of this camera, the $98 C930e, offers almost identical performance but has a 90-degree field of view and colors that are more vibrant but less accurate. Unfortunately with this recipe, you'll need to Ctrl-C after 10 seconds. On testing the camera's audio, I recorded and listened to the WAV file I recorded to the Pi's local storage. Now, I found the name "plughw:CARD=C920,DEV=0" which arecord described as "Hardware device with all software conversions" To test audio you can try to use alsa's arecord. The audio was more difficult than the video. the playback URL in VLC is "rtsp://' -v.I can decode the video on VLC on Mac (v2.2.4).OK, to use the Video4Linux2 driver to find the camera's video device do this: v4l2-ctl -list-devices I may be able to shed some light but also provide documentation and experience to other users. I spent a number of hours recently with my C920 and a Raspberry Pi 3 recently to make a bab圜am that I could stream within my home network.
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