jcodec github

图片转视频，文档有个例子,如下

File output = new File("test.mp4");
SequenceEncoder enc = SequenceEncoder.createWithFps(NIOUtils.writableChannel(output), new Rational(1, 1));
String[] files = {"frame0.png", "frame1.png", "frame2.png"};
for (String file : files) {
   enc.encodeNativeFrame(AWTUtil.decodePNG(new File(file), ColorSpace.RGB));
}
enc.finish();

但是如果直接使用上面的代码，可能会遇到问题

java.lang.IllegalArgumentException: Component 1 height should be a multiple of 2 for colorspace: YUV420J

图片高不是2的倍数，就会报这个错误，可以通过图片缩放来解决这个问题。

File output = new File(System.getProperty("user.dir") + File.separator + uniqueId + System.currentTimeMillis() + ".mp4");

SequenceEncoder enc = SequenceEncoder.createSequenceEncoder(output,1);

for (int i=0; i< objectNames.size();i++) {
    String g = objectNames.get(i);
    InputStream input = inputstreamFrom(g);
    BufferedImage image = null;
    try {
        image = ImageIO.read(input);
       
        // 宽和高必须为2的倍数
        // java.lang.IllegalArgumentException: Component 1 height should be a multiple of 2 for colorspace: YUV420J
        int destWidth = image.getWidth();
        int destHeight = image.getHeight();
        boolean shouldScale = false;
        if (image.getWidth() % 2 != 0) {
                destWidth++;
                shouldScale = true;
        }
        if (image.getHeight() % 2 != 0) {
                destHeight++;
                shouldScale = true;
        }

                if (shouldScale) {
                        BufferedImage destImage = new BufferedImage(destWidth,destHeight,BufferedImage.TYPE_INT_RGB);
                        destImage.getGraphics().drawImage(image,0,0,destWidth,destHeight,null);
                        image = destImage;
                }
       
        enc.encodeNativeFrame(AWTUtil.fromBufferedImageRGB(image));
    } catch (Exception e) {
        LoggerFormat.error(e);
    } finally {
        input.close()                
    }
}
enc.finish();
this.saveFileToMinio(bucketName,uniqueId + "/" + uniqueId + ".mp4","video/mp4",new FileInputStream(output));
output.delete();