hi,
Thanks for your reply, please can you send me a sample code of
Bitmap.compress(..) that can help me. where here is my code to compress it to
jpeg
public void onPreviewFrame(byte[] data, Camera camera) {
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();
it gives me 768x428 size of images. i want the QVGA size that is quarter the
size of normal VGA image, and it doesn't metter how the quality is. Please tell
me Bitmap.compress(..) is a something
different technique ? or suggest me another best technique for implementation.
and on server side i want to create a video with these images.
Thanks
> Subject: Re: [android-developers] How to compress images in onPreviewframe??
> From: har...@gmail.com
> Date: Thu, 12 Jan 2012 16:33:20 +0200
> To: android-developers@googlegroups.com
>
> Hi,
>
> If you want to have 2-3KB image size it has to be very small by dimension and
> compressed using very low quality. You can try different values on
> Bitmap.compress(..) but I doubt you will ever achieve good enough quality
> with such a small filesize requirement.
>
> --
> H
>
> On Jan 12, 2012, at 3:56 PM, muhammad.ume...@hotmail.com wrote:
>
> > hi,
> > I am trying stream video from android to network and receiving it
> > on a server that I had written in java.
> > I am capturing YUV data on onPreviewFrame method on Camera convert
> > with yuv in jpeg and sending it to the server where I convert this
> > data to image and displaying it.
> >
> > verything works fine but the size of the image is too large in KB to
> > send on network that are 20-30 kb, I want to reduce the size(KB)
> > approximately 2-3 kb. please tell me how can i reduce the size? Is it
> > possible?
> >
> > Thanks and regards
> >
> > umer
> >
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