diff --git a/device/file/file.go b/device/file/file.go
index d068ace6..0ec2d928 100644
--- a/device/file/file.go
+++ b/device/file/file.go
@@ -22,6 +22,7 @@ LICENSE
   in gpl.txt.  If not, see http://www.gnu.org/licenses.
 */
 
+// Package file provides an implementation of AVDevice for files.
 package file
 
 import (
diff --git a/device/geovision/config/config-cli/main.go b/device/geovision/config/config-cli/main.go
index 9956d264..72cab4d7 100644
--- a/device/geovision/config/config-cli/main.go
+++ b/device/geovision/config/config-cli/main.go
@@ -22,6 +22,7 @@ LICENSE
   in gpl.txt.  If not, see http://www.gnu.org/licenses.
 */
 
+// config-cli is a command-line program for configuring the GeoVision camera.
 package main
 
 import (
diff --git a/device/geovision/geovision.go b/device/geovision/geovision.go
index decf1e80..35b554fd 100644
--- a/device/geovision/geovision.go
+++ b/device/geovision/geovision.go
@@ -23,6 +23,8 @@ LICENSE
   in gpl.txt.  If not, see http://www.gnu.org/licenses.
 */
 
+// Package geovision provides an implementation of the AVDevice interface
+// for the GeoVision IP camera.
 package geovision
 
 import (
diff --git a/device/raspivid/raspivid.go b/device/raspivid/raspivid.go
index d47fc346..d6311825 100644
--- a/device/raspivid/raspivid.go
+++ b/device/raspivid/raspivid.go
@@ -22,6 +22,7 @@ LICENSE
   in gpl.txt.  If not, see http://www.gnu.org/licenses.
 */
 
+// Package raspivid provides an implementation of AVDevice for the raspberry pi camera.
 package raspivid
 
 import (
diff --git a/device/webcam/webcam.go b/device/webcam/webcam.go
index bb41b7cf..22472702 100644
--- a/device/webcam/webcam.go
+++ b/device/webcam/webcam.go
@@ -22,6 +22,7 @@ LICENSE
   in gpl.txt.  If not, see http://www.gnu.org/licenses.
 */
 
+// Package webcam provides an implementation of AVDevice for webcams.
 package webcam
 
 import (