diff --git a/README.md b/README.md
index ceddd76..b557bdb 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,9 @@
 ## 应用开发
 
 [LCD应用编程](./apps)
+
+[Gstreamer使用](./gst.md)
+
 ## Uboot中驱动开发
 
 [GPIO驱动](./uboot)
diff --git a/debug/camera/README.md b/debug/camera/README.md
index f2a75ba..14f561e 100644
--- a/debug/camera/README.md
+++ b/debug/camera/README.md
@@ -221,7 +221,7 @@ IQ文件会全部拷贝到etc/iqfiles目录下
 
 	/etc/init.d/S50set_pipeline start
 
-### Test mipi camera on Buildroot
+### Test mipi camera(on Buildroot system)
 
 Test mipi camera using gstreamer(camera_rkisp.sh)
 
@@ -266,7 +266,7 @@ Dump picture to file(using 7yuv to view the file)
 		--set-fmt-video=width=2112,height=1568,pixelformat=SBGGR10 \
 		--stream-mmap=3 --stream-to=/tmp/mp.raw.out --stream-count=1 --stream-poll
 
-### USB摄像头使用(linux系统)
+### USB摄像头使用(linux distro系统)
 
 [参考代码](./test_camera-uvc.sh)
 
@@ -286,4 +286,4 @@ Dump picture to file(using 7yuv to view the file)
 
 指定输出格式和大小
 
-	su linaro -c 'gst-launch-1.0 v4l2src device=/dev/video8 ! "image/jpeg,width=640,height=480,framerate=30/1" ! mppvideodec ! rkximagesink sync=false'
+	su linaro -c 'gst-launch-1.0 v4l2src device=/dev/video0 ! "image/jpeg,width=640,height=480,framerate=30/1" ! mppvideodec ! rkximagesink sync=false'
diff --git a/gst.md b/gst.md
new file mode 100644
index 0000000..088fac2
--- /dev/null
+++ b/gst.md
@@ -0,0 +1,26 @@
+# Gstreamer使用
+
+## 视频播放
+
+使用gstreamer播放本地视频
+
+	export DISPLAY=:0.0
+	gst-launch-1.0 uridecodebin uri=file:///usr/local/test.mp4 ! rkximagesink
+
+如果是root用户执行则要切换到普通用户
+
+	su linaro -c "gst-launch-1.0 uridecodebin uri=file:///usr/local/test.mp4 ! rkximagesink"
+
+## 编解码测试
+
+编解码测试[参考代码](./test_enc.sh)
+
+	export DISPLAY=:0.0
+	su linaro -c "gst-launch-1.0 videotestsrc num-buffers=512 ! video/x-raw,format=NV12,width=1920,height= 1080,framerate=30/1 ! queue ! mpph264enc ! queue ! h264parse ! mpegtsmux ! filesink location=/home/linaro/2k.ts"
+	su linaro -c "gst-launch-1.0 uridecodebin uri=file:///home/linaro/2k.ts ! rkximagesink"
+
+
+JPEG解码测试
+
+	export DISPLAY=:0.0
+	su linaro -c 'gst-launch-1.0 -v videotestsrc ! "video/x-raw,width=1920,height=1080" ! queue ! jpegenc ! queue ! jpegparse ! queue ! mppvideodec ! rkximagesink'
diff --git a/test_enc.sh b/test_enc.sh
new file mode 100755
index 0000000..9ade1f3
--- /dev/null
+++ b/test_enc.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+export DISPLAY=:0.0
+#export GST_DEBUG=*:5
+#export GST_DEBUG_FILE=/tmp/2.txt
+
+echo "message: output to /home/linaro/2k.ts!"
+
+su linaro -c "gst-launch-1.0 videotestsrc num-buffers=512 ! video/x-raw,format=NV12,width=1920,height= 1080,framerate=30/1 \
+    ! queue ! mpph264enc ! queue ! h264parse ! mpegtsmux ! filesink location=/home/linaro/2k.ts"
+
+echo "message: playing encoded video!"
+
+su linaro -c "gst-launch-1.0 uridecodebin uri=file:///home/linaro/2k.ts  ! rkximagesink"