If you are sure that what you are sending from the device is fine, then I'd
imagine that whatever server side system you are using to save the files
isn't doing it the correct way. What do you mean by correct format? Does it
get saved only partially? Or is it just a mixed up bunch of data?
Thanks
On Mon, Nov 28, 2011 at 12:44 PM, Muhammad UMER <muhammad.ume...@hotmail.com
> wrote:
> 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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