Question

有谁能告诉我如何在Android中组合图像并生成mp4文件并将视频文件存储在sdCard中？提前致谢

Answer 1

请检查以下代码

制作一个文件 FfmpegController.java

public class FfmpegController {

    private static Context mContext;
    private static Utility mUtility;
    private static String mFfmpegBinaryPath;

    public FfmpegController(Context context) {

        mContext = context;

        mUtility = new Utility(context);

        initFfmpeg();
    }

    private void initFfmpeg()
    {
        /*
        Save the ffmpeg binary to app internal storage, so we can use it by executing java runtime command.
         */

        mFfmpegBinaryPath = mContext.getApplicationContext().getFilesDir().getAbsolutePath() + "/ffmpeg";

        if (Utility.isFileExsisted(mFfmpegBinaryPath))
            return;

        InputStream inputStream = mContext.getResources().openRawResource(R.raw.ffmpeg);

        mUtility.saveFileToAppInternalStorage(inputStream, "ffmpeg");

        Utility.excuteCommand(CommandHelper.commandChangeFilePermissionForExecuting(mFfmpegBinaryPath));
    }

    public void convertImageToVideo(String inputImgPath)
    {
        /*
        Delete previous video.
         */

        Log.e("Image Parth", "inputImgPath - "+inputImgPath);

        if (Utility.isFileExsisted(pathOuputVideo()))
            Utility.deleteFileAtPath(pathOuputVideo());

        /*
        Save the command into a shell script.
         */

        saveShellCommandImg2VideoToAppDir(inputImgPath);

        Utility.excuteCommand("sh" + " " + pathShellScriptImg2Video());
    }

    public String pathOuputVideo()
    {
        return mUtility.getPathOfAppInternalStorage() + "/out.mp4";
    }

    private String pathShellScriptImg2Video()
    {
        return mUtility.getPathOfAppInternalStorage() + "/img2video.sh";
    }

    private void saveShellCommandImg2VideoToAppDir(String inputImgPath)
    {
        String command = CommandHelper.commandConvertImgToVideo(mFfmpegBinaryPath, inputImgPath, pathOuputVideo());

        InputStream is = new ByteArrayInputStream(command.getBytes());

        mUtility.saveFileToAppInternalStorage(is, "img2video.sh");
    }
}

制作另一个Java文件 Utility.java

public class Utility {

    private final static String TAG = Utility.class.getName();
    private static Context mContext;

    public Utility(Context context) {
        mContext = context;
    }

    public static String excuteCommand(String command)
    {
        try {
            Log.d(TAG, "execute command : " + command);

            Process process = Runtime.getRuntime().exec(command);

            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(process.getInputStream()));
            int read;
            char[] buffer = new char[4096];
            StringBuffer output = new StringBuffer();
            while ((read = reader.read(buffer)) > 0) {
                output.append(buffer, 0, read);
            }
            reader.close();

            process.waitFor();

            Log.d(TAG, "command result: " + output.toString());

            return output.toString();

        } catch (IOException e) {

            Log.e(TAG, e.getMessage(), e);

        } catch (InterruptedException e) {

            Log.e(TAG, e.getMessage(), e);
        }

        return "";
    }

    public String getPathOfAppInternalStorage()
    {
        return mContext.getApplicationContext().getFilesDir().getAbsolutePath();
    }

    public void saveFileToAppInternalStorage(InputStream inputStream, String fileName)
    {
        File file = new File(getPathOfAppInternalStorage() + "/" + fileName);
        if (file.exists())
        {
            Log.d(TAG, "SaveRawToAppDir Delete Exsisted File");
            file.delete();
        }

        FileOutputStream outputStream;
        try {
            outputStream = mContext.openFileOutput(fileName, Context.MODE_PRIVATE);
            byte[] buffer = new byte[1024];
            int length;
            while ((length = inputStream.read(buffer)) > 0)
            {
                outputStream.write(buffer, 0, length);
            }
            outputStream.close();
            inputStream.close();
        } catch (Exception e) {
            Log.e(TAG, e.getMessage(), e);
        }
    }

    public static boolean isFileExsisted(String filePath)
    {
        File file = new File(filePath);
        return file.exists();
    }

    public static void deleteFileAtPath(String filePath)
    {
        File file = new File(filePath);
        file.delete();
    }
}

制作另一个文件 CommandHelper.java

public class CommandHelper {
    public static String commandConvertImgToVideo(String ffmpegBinaryPath, String inputImgPath, String outputVideoPath) {
        Log.e("ffmpegBinaryPath", "ffmpegBinaryPath - "+ffmpegBinaryPath);
        Log.e("inputImgPath", "inputImgPath - "+inputImgPath);
        Log.e("outputVideoPath", "outputVideoPath - "+outputVideoPath);

        return ffmpegBinaryPath + " -r 1/1 -i " + inputImgPath + " -c:v libx264 -crf 23 -pix_fmt yuv420p -s 640x480 " + outputVideoPath;
    }

    public static String commandChangeFilePermissionForExecuting(String filePath) {
        return "chmod 777 " + filePath;
    }
}

如果您想执行代码并将图像制作成视频，请使用以下代码。

AsyncTask asyncTask = new AsyncTask() {

         ProgressDialog mProgressDialog;

         @Override
         protected void onPreExecute() {
            /* mProgressDialog = new ProgressDialog(activity.this);

             mProgressDialog.setMessage("Converting...");

             mProgressDialog.setCancelable(false);

             mProgressDialog.show();*/

             Log.e("Video Process Start", "======================== Video Process Start ======================================");
         }

         @Override
         protected Object doInBackground(Object... params) {

            saveInputImgToAppInternalStorage();
/*           for(int i = 1; i<11 ; i++){
             mFfmpegController.convertImageToVideo(mUtility.getPathOfAppInternalStorage() + "/" + "Img"+i+".jpg");
             }
*/

            mFfmpegController.convertImageToVideo(mUtility.getPathOfAppInternalStorage() + "/" + "img%05d.jpg");
             return null;
         }

         @Override
         protected void onPostExecute(Object o) {
            // mProgressDialog.dismiss();
             Log.e("Video Process Complete", "======================== Video Process Complete ======================================");

             Log.e("Video Path", "Path - "+mFfmpegController.pathOuputVideo());

             Toast.makeText(activity.this, "Video Process Complete", Toast.LENGTH_LONG).show();
             stopSelfResult(lateststartid);
             Common.ScreenshotCounter = 0;
             Common.ScreenshotTimerCounter = 0;
             /*try {
                copyFile(new FileInputStream(mFfmpegController.pathOuputVideo()), new FileOutputStream(Common.strPathForVideos));
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }*/

         }
     };

请注意：

捕获的图像必须采用以下格式：