
amcap requires setting a few options before starting video capture. first, set the frame rate by selecting menu item capture -] set frame rate...

for best quality video capture, use a capture rate (frames per second) that is slow enough so that there are no dropped frames.
if you are capturing audio, then use menu item capture -] capture audio to turn on the checkmark for audio capture.

set the master stream for audio/video synchronization by using the control dialog brought up by capture -] master stream to select whether audio, video, or none is the master stream for synchronization.

you can optionally set a time limit on this capture through the capture -] set time limit... dialog.
once the proper configuration is confirmed, click capture -] start capture menu item, then click ok on the confirmation dialog to start your capture. if you did not set a time limit, use the menu item capture -] stop capture or press the esc button to end your capture.