WebP: Reading from ImageInputStream with unknown length does not decode (produces black image)

I tried to convert webP file to JPG with TwelveMonkeys imageIO 8.2 version. My output jpg image turn black.

String targetFileName = path + "../out/" +  fileName;
targetFileName = targetFileName.substring(0, targetFileName.lastIndexOf(".")) + ".jpg";
File outputFile = new File(targetFileName);
		    	
InputStream is = new FileInputStream(inputFile);
ImageInputStream iis = ImageIO.createImageInputStream(is);
BufferedImage originalImage = ImageIO.read(iis)

BufferedImage newImage = new BufferedImage(Math.round(newSize[0]), Math.round(newSize[1]), BufferedImage.TYPE_INT_RGB);
					
Image scaleImage = originalImage.getScaledInstance( Math.round(newSize[0]-diffAdd),  Math.round(newSize[1]),Image.SCALE_DEFAULT);
					
Graphics g = newImage.getGraphics();
g.setColor(Color.WHITE);
g.fillRect(0, 0, Math.round(orgWidth + 2 * diffAdd), Math.round(newSize[1])); //Adds white bar on right and left.
g.drawImage(scaleImage, Math.round(diffAdd), 0, null);

g.dispose();
					
OutputStream os = new FileOutputStream(outputFile);
ImageOutputStream ios = ImageIO.createImageOutputStream(os);
				        
ImageIO.write(newImage, "jpg", ios); 

I added following jars common-image-3.8.2.jar common-io-3.8.2.jar common-lang-3.8.2.jar imageio-core-3.8.2.jar imageio-jpeg-3.8.2.jar imageio-metadata-3.8.2.jar imageio-tiff-3.8.2.jar imageio-webp-3.8.2.jar

[haraldk]

Odd…

I can reproduce the black image issue using:

File inputFile = new File(args[0]);
InputStream is = new FileInputStream(inputFile);
ImageInputStream iis = ImageIO.createImageInputStream(is);
BufferedImage originalImage = ImageIO.read(iis);

However, using:

File inputFile = new File(args[0]);
BufferedImage originalImage = ImageIO.read(inputFile);

Or:

File inputFile = new File(args[0]);
ImageInputStream iis = ImageIO.createImageInputStream(inputFile);
BufferedImage originalImage = ImageIO.read(iis);

…reads the image as it should. 🤔

You can use one of these forms as a workaround for now, but of course, all three versions should work exactly the same… I’ll investigate.

[haraldk]

Okay,

I’ll try to look into it over the holidays.