1. Video upload and streaming
Record video
Android camera
Looxcie
Upload video
http put
Thread
Video streaming
Streaming server
Video formatting
Playing a video stream

2. Record video Recording with phone’s camera is in another lecture
Looxcie
records video and holds it in the camera.
Looxcie app pulls the video from camera to phone

3. ftp package New app – VideoStreamer ftp package
Add user permission: Internet
ftp package
Download apache commons.net package from
Get binary
Decompress
Add package
Right on the src directory of the newly made app
Select build path -> configure build path
Click add external jar.
Browse to commons-net-2.2.jar
Select “Order and Export” tab
Click commons-net-2.2.jar

4. Using ftp Make new class, FTPHelper Add member function, uploadFile
FTPClient ftpClient = new FTPClient();
ftpClient.connect( " " );
ftpClient.login( "ftpuser", "ftpuser" );
System.out.println("Connected to ");
System.out.print(ftpClient.getReplyString());
BufferedInputStream buffIn = null;
buffIn = new BufferedInputStream(new FileInputStream("/mnt/sdcard/my_mov.mp4"));
result = ftpClient.storeFile("my_vov.mp4", buffIn);
if (result) {
Log.e("DebugInfo","ftp trasnfer returned true");
} else {
Log.e("DebugInfo","ftp trasnfer returned false"); }

5. In VideoStreamer class
At the end of onCreate, add
FTP ftp = new FTP();
ftp.uploadFile();
Run
If the file is very large, this will fail because the UI thread cannot take too long
You must use theads

6. threads asyncTask - easy threads In VideoStreamer class, add new class
private class UploadFileTask extends AsyncTask {}
Let eclipse add unimplemented methods
Move from onCreate to doInBackground
FTP ftp = new FTP();
ftp.uploadFile();
In onCreate, add
new UploadFileTask().execute();
Run.

7. Video Server Popular video servers Darwin Wowza Apple version
Open source version
Supports many formats including quicktime
I couldn’t get it working on windows
Wowza
Not open source
Free (for a small number of users/downloaders)

8. Try it Take video with phone
Pull file from phone (in /mnt/sdcard/DCIM/Camera/*.3gp)
Put file in
C:\Program Files (x86)\Wowza Media Systems\Wowza Media Server 2.2.3\content
Open VLC
Select menu: media -> network stream
enter rtsp:// :1935/vod/mp4:Vid3.mp4
Where Vid3.mp4 is the name
Does not work

9. Streaming Video Format
It is not always possible to stream a video captured by any video camera
Wowza Media Server and Flash only support H.264 (AVC1, MPEG4 Part 10), AAC (MP4A, AAC, AAC+, HE-AAC) and MP3 in an MP4 file.
The format can be checked
Gspot:
Shows the format details

10. transcoding
MS Expression can also make video files that can be streamed. But this requires manual effort, whereas ffmpeg can be run from command line or a script
Ffmpeg can be used to transcode
read a video file compressed in one set of codecs and recompress in another set
Transcoding is very slow
Works better if the source is low bit-rate. On phone video, select low rate
Using ffmpeg is tricky
The following perl code transcode.pl
#!/usr/bin/perl
d:\\uploadedContent\\ffmpeg\\bin\\ffmpeg.exe -i $ARGV[0] -strict experimental -acodec aac -ab 32k -vcodec libx264 -fpre libx264-medium.ffpreset -b 512k $ARGV[0].mp4
Call via>> perl transode.pl filename.3gp
These parameters can be adjusted
Try it:
Take video with camera
Pull from phone, move to directory where ffmpeg is located (might need to copy FFPreset files to this directory)
Run perl code
Wait
Move file to directory
View with vlc

11. Video streaming on android
Change the VideoStreaming Activity so that it
implements SurfaceHolder.Callback
Add member variables
private SurfaceView mPreview;
private SurfaceHolder holder;
private MediaPlayer mMediaPlayer;
Add surface view to layout. Call it SurfaceView
At the end of onCreate,
mPreview = (SurfaceView) findViewById(R.id.SurfaceView);
holder = mPreview.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
Add button, StartVideo
Add callback
Button startButton = (Button)findViewById(R.id.StartVideo);
startButton.setOnClickListener(new View.OnClickListener() {});
In onClick, add
playVideo();
Make public void playVideo() {
if (mMediaPlayer != null) {
mMediaPlayer.release();
mMediaPlayer = null; }
mMediaPlayer = new MediaPlayer();
//mMediaPlayer.setDataSource("/mnt/sdcard/DCIM/Camera/VID_ _ gp"); // some file
mMediaPlayer.setDataSource("rtsp:// :1935/vod/mp4:Vid3.mp4"); // some stream
//mMediaPlayer.setDataSource("rtsp:// :1935/vod/mp4:sample.mp4");
mMediaPlayer.setDisplay(holder);
mMediaPlayer.prepare();
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mMediaPlayer.start();
Run
It takes a long time. But should run

12. improvements Lots of things can be improved with callbacks
Put progress bar to give the user feedback as video is starting
In layout, add ProgressBar
Add member variable
ProgressBar progressBar;
In onCreate,
progressBar = (ProgressBar)findViewById(R.id.ProgressBar01);
progressBar.setVisibility(View.INVISIBLE);
In playVideo
At the beginning, add progressBar.setVisibility(View.VISIBLE);
After mMediaPlayer = new MediaPlayer();, add
mMediaPlayer.setOnPreparedListener(new OnPreparedListener() {});
In onPrepared, add
mMediaPlayer.start();
Change mMediaPlayer.prepare(); to
mMediaPlayer.prepareAsync();
Remove mMediaPlayer.start();
Now run, and progress bar shows that something is happening
But if an error occurs, the progress bar never stops
Need to add more callbacks
setOnErrorListener(android.media.MediaPlayer.OnErrorListener) to catch errors
setOnCompletionListener(OnCompletionListener)., when it finished, to clean up screen or something
setOnBufferingUpdateListener to track the buffer, this gives a percent