我想通过在两个图像之间应用过渡动画来从图像列表制作动画视频.我在SO上发现了很多类似的问题,
Android Screen capturing or make video from images
Android- How to make video using set of images from sd card?
所有类似的SO问题建议使用动画,但我们如何将动画图像存储到视频文件？是否有任何Android库支持此工具制作图像视频？
任何帮助表示赞赏…… !!!
提前致谢
解决方法
Android不支持AWT的BufferedBitmap和AWTUtil,也就是Java SE.目前,SequenceEncoder的解决方案已集成到jcodec的Android版本中.您可以从包org.jcodec.api.SequenceEncoder中使用它.
以下是使用jcodec从一系列位图生成MP4文件的解决方案：
try {
File file = this.GetSDPathToFile("","output.mp4");
SequenceEncoder encoder = new SequenceEncoder(file);
// only 5 frames in total
for (int i = 1; i <= 5; i++) {
// getting bitmap from drawable path
int bitmapResId = this.getResources().getIdentifier("image" + i,"drawable",this.getPackageName());
Bitmap bitmap = this.getBitmapFromResources(this.getResources(),bitmapResId);
encoder.encodeNativeFrame(this.fromBitmap(bitmap));
}
encoder.finish();
} catch (IOException e) {
e.printStackTrace();
}
// get full SD path
File GetSDPathToFile(String filePatho,String fileName) {
File extBaseDir = Environment.getExternalStorageDirectory();
if (filePatho == null || filePatho.length() == 0 || filePatho.charAt(0) != '/')
filePatho = "/" + filePatho;
makeDirectory(filePatho);
File file = new File(extBaseDir.getAbsoluteFile() + filePatho);
return new File(file.getAbsolutePath() + "/" + fileName);// file;
}
// convert from Bitmap to Picture (jcodec native structure)
public Picture fromBitmap(Bitmap src) {
Picture dst = Picture.create((int)src.getWidth(),(int)src.getHeight(),ColorSpace.RGB);
fromBitmap(src,dst);
return dst;
}
public void fromBitmap(Bitmap src,Picture dst) {
int[] dstData = dst.getPlaneData(0);
int[] packed = new int[src.getWidth() * src.getHeight()];
src.getPixels(packed,src.getWidth(),src.getHeight());
for (int i = 0,srcOff = 0,dstOff = 0; i < src.getHeight(); i++) {
for (int j = 0; j < src.getWidth(); j++,srcOff++,dstOff += 3) {
int rgb = packed[srcOff];
dstData[dstOff] = (rgb >> 16) & 0xff;
dstData[dstOff + 1] = (rgb >> 8) & 0xff;
dstData[dstOff + 2] = rgb & 0xff;
}
}
}
如果您需要更改fps,可以自定义SequenceEncoder.
