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How to crop video with ffmpeg library in Android?

由 旧时模样 提交于 2019-12-06 15:31:13

My own implementation:

private void cropVideo(String originalVideoPath, String croppedVideoPath, int xCoordinate,
                       int yCoordinate, int imageWidth, int imageHeight, int croppedAngle) {
    String command;
    ffmpegCommand = new StringBuilder();
    ffmpegCommand.append("-y");
    ffmpegCommand.append(" ");
    ffmpegCommand.append("-i");
    ffmpegCommand.append(" ");
    ffmpegCommand = getFFmpegCommand(ffmpegCommand, imageWidth, imageHeight,
            xCoordinate, yCoordinate, originalVideoPath, croppedVideoPath, croppedAngle);
    command = ffmpegCommand.toString();

    Log.i(TAG, command);
    String[] cmd = command.split(" ");

    new CropVideoTask().execute(cmd);

}

private StringBuilder getFFmpegCommand(StringBuilder ffmpegCommand, int imageWidth,
                                           int imageHeight, int xCoordinate, int yCoordinate,
                                           String originalVideoPath, String croppedVideoPath, int angle) {
        int x = 0;
        int y = 0;
        int w = 0;
        int h = 0;
        String rotate = "";
        switch (angle) {
            case 0:
                x = xCoordinate;
                y = yCoordinate;
                w = imageWidth;
                h = imageHeight;
                break;
            case 90:
                x = yCoordinate;
                y = mFileWidth - imageWidth - xCoordinate;
                w = imageHeight;
                h = imageWidth;
                rotate = ",transpose=1";
                break;
            case 180:
                x = mFileHeight - imageWidth - xCoordinate;
                y = mFileWidth - imageHeight - yCoordinate;
                w = imageWidth;
                h = imageHeight;
                rotate = ",vflip";
                break;
            case -90:
                x = mFileHeight - imageHeight - yCoordinate;
                y = xCoordinate;
                w = imageHeight;
                h = imageWidth;
                rotate = ",transpose=2";
                break;
        }

        ffmpegCommand.append(originalVideoPath);
        ffmpegCommand.append(" ");
        ffmpegCommand.append("-vf");
        ffmpegCommand.append(" ");
        ffmpegCommand.append("crop=");
        ffmpegCommand.append(w);
        ffmpegCommand.append(":");
        ffmpegCommand.append(h);
        ffmpegCommand.append(":");
        ffmpegCommand.append(x);
        ffmpegCommand.append(":");
        ffmpegCommand.append(y);
        ffmpegCommand.append(rotate);
        ffmpegCommand.append(" ");
        ffmpegCommand.append(croppedVideoPath);

        return ffmpegCommand;
    }

private class CropVideoTask extends AsyncTask<String[], Void, Void> {
        protected Void doInBackground(String[]... cmd) {
            try {
                ffmpeg = FFmpeg.getInstance(getContext());
                ffmpeg.execute(cmd[0], new ExecuteBinaryResponseHandler() {

                    @Override
                    public void onStart() {
                    }

                    @Override
                    public void onProgress(String message) {
                    }

                    @Override
                    public void onFailure(String message) {

                    }

                    @Override
                    public void onSuccess(String message) {
                      // Do something with the cropped video                   
                    }

                    @Override
                    public void onFinish() {

                    }
                });
            } catch (FFmpegCommandAlreadyRunningException e) {
                Log.i(TAG, "doInBackground: Exception + Device is not supported");
            }
            return null;
        }
    }
标签
android
ffmpeg
camera
android-camera
android-ffmpeg
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