我的麦克风工作正常（使用声音控制面板，当我说话时它会显示条，它可以与 Google Talk 等配合使用）。现在我想将它用于 xvidcap，它需要一个文件来读取音频输入。我试过 /dev/dsp 和 /dev/snd 作为猜测，但它们不起作用。我如何确定我的音频输入的去向？
我似乎无法摆脱这个错误：
~ » sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0 B/137 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
dpkg: error processing package libqt4-svg:i386 (--configure):
package libqt4-svg:i386 is not ready for configuration
cannot configure …