[] Images transcoding ?

General discussion about Universal Media Server (no support or requests)
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[] Images transcoding ?

Post by Sami32 » Mon Jun 06, 2016 1:49 pm


Sanselan, TwelveMonkeys, Metadata-extractor or FFMpeg can do the job, but i'm not skilled to know which one will use less CPU and less memory for that purpose.

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ffmpeg -i input.png -pix_fmt yuvj420p output.jpg
will do the job.

Or this sample of code taken on the Web :

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import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

public class Tiff2JpgTest {

public static void main(String args[])
        BufferedImage image = ImageIO.read(new File("test.tiff"));
        image = convert(image, BufferedImage.TYPE_INT_RGB);
        ImageIO.write(image, "jpg", new File("test.jpg"));
    catch(Exception e)

public static BufferedImage convert(BufferedImage src, int bufImgType) {
    BufferedImage img= new BufferedImage(src.getWidth(), src.getHeight(), bufImgType);
    Graphics2D g2d= img.createGraphics();
    g2d.drawImage(src, 0, 0, null);
    return img;
But, if anyone was interested, some more metadatas will need to be extracted to get a more precise, correct renderer's configuration ( CMYK and Progressive attribute write in the supported formats ).
DLNAMediaInfo.java could need some getImageInfo adds like :

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Just some ideas that i got when i was reading some posts on this forum :roll:

EDIT : On his way..., thank very much to @Valib :D
https://github.com/UniversalMediaServer ... r/pull/911
https://github.com/UniversalMediaServer ... issues/886

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