5. From raspberrypi2 to USB webcam - 1) Video streaming - KAIST Mobile Software Project

The condition of Streamer selection
- Availability of control resolution, fps, display quality for adapting to raspberrypi2 specification
- Delay of maximum 5 second
- Whether the option to save the image file to be used for OPENCV is possible.
The result of Streamer
Gstreamer
Install Streamer
Set up Raspberry Pi

Install gstreamer
Update your Raspbian before install gstreamer packages.
```
sudo apt-get upgrade
sudo apt-get update
```
Install gstreamer packages.
```
sudo apt-get install gstreamer-tools gstreamer0.10-plugins-bad gstreamer0.10-plugins-good v4l-utils
```
Create gstreamer start script
I like tcsh shell.
```
sudo apt-get install tcsh
```
Create the script gst-server.sh to start gstreamer streaming server.
```
#!/bin/tcsh

set myip=192.168.XXX.XXX
set port=5000
set width=320
set height=240

gst-launch\
  v4l2src !\
  ffmpegcolorspace !\
  video/x-raw-yuv,width=${width},height=${height},framerate=$fraction$30/1 !\
  jpegenc !\
  tcpserversink host=${myip} port=${port} sync=false
```
Add an executable permission to the script.
```
chmod u+x gst-server.sh
```
Connect a webcam

I used PS3 Eye as a webcam. You can use other webcams.

Start gstreamer
Run the script.
```
./gst-server.sh
```
Set up Android phone
I created an Android application simplemjpegview_gst based on SimpleMjpegStreamer. You can download the source codes.

You can download apk file here.
https://docs.google.com/file/d/0B1V8jj4Adbrpdzl4VGVjcW1GT28/edit?usp=sharing
Test Streaming
4.1 Test Environment
Hardware : Raspberrypi2, USB 2.1A Power, Legitec C310 720p Webcam, Sharing gateway to make internal network
Software : gstreamer Server/Client

4.2 Test Result

Execution of Raspberrypi gstreamer server --> Excution of Android gstreamer client
The result
- Checked tolerable delay in the internal network
- External power for USB webcam is necessary for supporting power safely.
To do
- Intall OpenCV written by executable python on Raspberrypi
- gstreamer & OPENCV cooperation (Testing OPENCV example supported by gstreamer using capture functionality, Testing considered turbulence)
- Analysis of Android gstreamer client source code for porting
- Simple and right camera which doesn't need external power supply is necessary(PICAM)

현재 버전	2015-12-16 15:47:03
선택 버전

5. From raspberrypi2 to USB webcam - 1) Video streaming

Set up Raspberry Pi

Install gstreamer

Create gstreamer start script

Connect a webcam

Start gstreamer

Set up Android phone

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