Approaches are described for providing input to a portable computing device, such as a mobile phone. A user's hand can be detected based on data (e.g., one or more images) obtained by at least one sensor of the device, such as camera, and the images can be analyzed to locate the hand of the user. As part of the location computation, the device can determine a motion being performed by the hand of the user, and the device can determine a gesture corresponding to the motion. In the situation where the device is controlling a media player capable of playing media content, the gesture can be interpreted by the device to cause the device to, e.g., pause a media track or perform another function with respect to the media content being presented via the device.