根据你说的步骤给出示例代码

以下是一个使用Java实现GIF转视频的示例代码，使用了GifDecoder和Xuggler库：

import com.xuggle.mediatool.IMediaWriter;
import com.xuggle.mediatool.ToolFactory;
import com.xuggle.xuggler.ICodec;
import com.xuggle.xuggler.IContainerFormat;
import com.xuggle.xuggler.IStreamCoder;
import com.xuggle.xuggler.IVideoPicture;
import com.xuggle.xuggler.IVideoPictureFormat;
import com.xuggle.xuggler.video.ConverterFactory;
import com.xuggle.xuggler.video.IConverter;
import com.gif4j.*;

public class GifToVideoConverter {

    public static void main(String[] args) {
        String gifFilePath = "path/to/your/gif/file.gif";
        String videoFilePath = "path/to/save/output/video.mp4";

        // Read the GIF file using GifDecoder
        GifImage gifImage = GifDecoder.decode(new java.io.File(gifFilePath));

        // Create a media writer to write the video file
        IMediaWriter mediaWriter = ToolFactory.makeWriter(videoFilePath);

        // Set up the video stream
        IContainerFormat containerFormat = IContainerFormat.make();
        containerFormat.setOutputFormat("mp4", null, "video/mp4");
        IStreamCoder videoCoder = IStreamCoder.make(IStreamCoder.Direction.ENCODING);
        ICodec codec = ICodec.findEncodingCodec(ICodec.ID.CODEC_ID_H264);
        videoCoder.setCodec(codec);
        videoCoder.setBitRate(200000);
        videoCoder.setPixelType(IVideoPictureFormat.Type.YUV420P);
        videoCoder.setHeight(gifImage.getHeight());
        videoCoder.setWidth(gifImage.getWidth());
        mediaWriter.addVideoStream(0, 0, codec.getID(),
                gifImage.getWidth(), gifImage.getHeight());

        mediaWriter.open(containerFormat, null);

        // Convert and write each frame of the GIF to the video file
        IConverter converter = ConverterFactory.createConverter("gif", videoCoder.getPixelType());
        for (int i = 0; i < gifImage.getNumberOfFrames(); i++) {
            BufferedImage frame = gifImage.getFrame(i);
            IVideoPicture picture = converter.toPicture(frame, (i * gifImage.getDelay()));
            mediaWriter.encodeVideo(0, picture);
        }

        // Close the media writer
        mediaWriter.close();
    }
}

请注意，这只是一个简单的示例代码，并未包含异常处理、参数验证等。你需要根据自己的实际需求进行修改和完善。同时，确保你已经添加了GifDecoder和Xuggler库的依赖。

希望这可以帮助到你！如果你还有其他问题，请随时提问。