Thanks for your reply.First,is it good way to create a video(Mjpeg) from jpeg
images? Secondly, In my code i compress camera onpreviewframe byte array to
jpeg format and its perfect but when i send this compressed byte array to
server through TCP socket and server save it in a file, but not in correct
format.
/////// Here is my client side code
public void onPreviewFrame(byte[] data, Camera camera) { // <11>
Camera.Parameters parameters = camera.getParameters();
int format = parameters.getPreviewFormat();
//YUV formats require more conversion
if (format == ImageFormat.NV21 /*|| format == ImageFormat.YUY2 ||
format == ImageFormat.NV16*/)
{
int w = parameters.getPreviewSize().width;
int h = parameters.getPreviewSize().height;
// Get the YuV image
YuvImage yuv_image = new YuvImage(data, format, w, h, null);
// Convert YuV to Jpeg
Rect rect = new Rect(0, 0, w, h);
ByteArrayOutputStream output_stream = new
ByteArrayOutputStream();
yuv_image.compressToJpeg(rect, 100, output_stream);
byte[] byt=output_stream.toByteArray();
FileOutputStream outStream = null;
try {
/////// this work perfect for sd card
//outStream = new FileOutputStream(String.format(
// "/sdcard/%d.jpg", System.currentTimeMillis()));
//outStream.write(byt);
//outStream.close();
// this method write byte array to socket
sendBytes(byt, 0, byt.length);
Log.d(TAG, "onPreviewFrame - wrote bytes: "
+ data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Preview.this.invalidate();
// Convert from Jpeg to Bitmap
//bmap =
BitmapFactory.decodeByteArray(output_stream.toByteArray(), 0,
output_stream.size());
}
////////// sending byte array to server
public void sendBytes(byte[] myByteArray, int start, int len) throws
IOException {
if (len < 0)
throw new IllegalArgumentException("Negative length not allowed");
if (start < 0 || start >= myByteArray.length)
throw new IndexOutOfBoundsException("Out of bounds: " + start);
// Other checks if needed.
// May be better to save the streams in the support class;
// just like the socket variable.
DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
//BufferedOutputStream imagebos = new BufferedOutputStream(dos);
dos.writeInt(len);
if (len > 0) {
/// this will write to socket
imagebos.write(myByteArray, start, len);
}
}
////// here is server side code /////////
while(dataInputStream.readInt() > 0 )
{
//// reading from client
////read from client in byte array
int len = dataInputStream.readInt();
byte[] data = new byte[2800000]; ////
how to specify the length in run time
if (len > 0)
{
dataInputStream.readFully(data);
//dataInputStream.read(data);
System.out.println("message: " + data);
}
//// write this data array on a file
FileOutputStream fos = new FileOutputStream("image.jpg", true);
ObjectOutputStream out = new ObjectOutputStream(fos);
out.write(data);
out.flush();
out.close();
fos.close();
}
the server side code is correct or not but the file is not in correct formate,
please tell me if i am doing wrong. Also tell me is it correct method to
combine the images file to create a video?
Please correct me if i m doing wrong
Thanks
umer
> Date: Sun, 27 Nov 2011 18:46:03 -0800
> From: l...@bendlin.us
> To: android-developers@googlegroups.com
> Subject: RE: [android-developers] Please help me!!! how to create video file
> on server side by send onPreviewFrames byte array
>
> It might be overly ambitious to send uncompressed frames to the server. You
> can compress them to Jpeg in memory and send these to the server via whatever
> method. On the server concatenate the files to a MJpeg stream.
>
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