标签:ffmpeg bitmap javacv android
我正在尝试使用javacv AndroidFrameConverter将大小为1280×720的帧转换为位图,并且转换需要很长时间.这是转换的示例代码.
FrameGrabber grabber = new FFmpegFrameGrabber(videoUrl);
frame = grabber.grab();
AndroidFrameConverter converter = new AndroidFrameConverter();
Bitmap originalBitmap = converter.convert(frame);
还有其他比这更快的解决方案吗?
解决方法:
您可以使用此代码并根据需要更改过滤器.
public class FilterAsync extends AsyncTask {
private FFmpegFrameGrabber VIDEO_GRABBER;
private FFmpegFrameRecorder videoRecorder;
private File file = new File(Environment.getExternalStorageDirectory() + "/Download/Abc.mp4");
private Context mContext;
private FFmpegFrameFilter filter;
private boolean isTrue = false;
private ArrayList<String> videoPaths;
private File myDirectory;
public FilterAsync(Context context) {
mContext = context;
VIDEO_GRABBER = new FFmpegFrameGrabber(file);
myDirectory = new File(Environment.getExternalStorageDirectory() + "/Folder/");
if (!myDirectory.exists()) {
myDirectory.mkdirs();
}
videoPaths = new ArrayList<>();
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Object doInBackground(Object[] params) {
Frame tempVideoFrame;
try {
VIDEO_GRABBER.start();
initVideoRecorder(myDirectory + "/video" + System.currentTimeMillis() + ".mp4");
filter.start();
while (VIDEO_GRABBER.grab() != null) {
tempVideoFrame = VIDEO_GRABBER.grabImage();
if (tempVideoFrame != null) {
filter.push(tempVideoFrame);
tempVideoFrame = filter.pull();
videoRecorder.record(tempVideoFrame);
}
}
videoRecorder.stop();
filter.stop();
videoRecorder.release();
VIDEO_GRABBER.stop();
VIDEO_GRABBER.release();
} catch (FrameGrabber.Exception e) {
e.printStackTrace();
} catch (FrameRecorder.Exception e) {
e.printStackTrace();
} catch (FrameFilter.Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
}
private void initVideoRecorder(String path) {
try {
filter = new FFmpegFrameFilter("transpose=clock ,crop=w=640:h=480:x=0:y=0", VIDEO_GRABBER.getImageWidth(), VIDEO_GRABBER.getImageHeight());
videoRecorder = FFmpegFrameRecorder.createDefault(path, VIDEO_GRABBER.getImageWidth(), VIDEO_GRABBER.getImageHeight());
videoRecorder.setAudioChannels(VIDEO_GRABBER.getAudioChannels());
videoRecorder.start();
} catch (FrameRecorder.Exception e) {
e.printStackTrace();
}
}
}
标签:ffmpeg,bitmap,javacv,android 来源: https://codeday.me/bug/20191118/2028857.html
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。