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I am having problems downloading a binary file (video) in my app from the internet. In Quicktime, If I download it directly it works fine but through my app somehow it get's messed up (even though they look exactly the same in a text editor). Here is a example: URL u = new URL("http://www.path.to/a.mp4?video"); HttpURLConnection c = (HttpURLConnection) u.openConnection(); c.setRequestMethod("GET"); c.setDoOutput(true); c.connect(); FileOutputStream f = new FileOutputStream(new File(root,"Video.mp4")); InputStream in = c.getInputStream(); byte[] buffer = new byte[1024]; int len1 = 0; while ( (len1 = in.read(buffer)) > 0 ) { f.write(buffer); } f.close();