Whenever I try to record a video with my webcam (I haven't tried, but I suppose that it won't work also for programs like Skype) I can correctly capture the video, but they are silent, the audio is not recorded. There should be some setting that need to be properly configured, but for now I haven't found it.
I'm using Kubuntu 12.04 with KDE 4.11.1; I'm using an Acer Travellmate 5720G and the webcam is integrated in my laptop's lid. I don't use the webcam very often so I can't say it for sure, but I think that it worked before the upgrade to the latest version of KDE.
Here are some screens taken from the System Settings:
As you can see in Audio Playback the sound card is correctly recognized, same thing for the webcam in the Video Recording section; but in the Audio Recording, nothing seems to be properly set up.
I've tried to capture the video both with Kamoso and VLC, and the problem persists, so I can exclude that it is related to one of these specific programs.
I've discovered that I had not selected the proper options:
The Analogic Stereo Output entry ws selected, so obviously the device was not set to be used also as an input. By selecting Analogic Stereo Duplex now I correctly get this:
Now I'm able to record audio along with video from the webcam, the problem is that the quality is very lousy. I have the following options available:
Line-in, surprisingly enough, is for external devices plugged in the line in jack, so obviously it's not what I'm looking for. The other two options are Microphone and Internal Microphone. If I use the former, all I can get is a continuous, regular and plain sound of static, it doesn't seem to record any sound from the surrounding environment at all. Even if I try to talk, I can't notice the slightest variation in that output noise. If I use the latter (Internal Microphone) the situation is better: I don't have any background static, and if I talk my voice is recorded, but the output sound quality is very lousy: it sounds scratched, something like a buzzing or a croaking. How can I improve it?
Please note that in both cases, adjusting the Input Volume Levels doesn't change the quality of the output.