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• H264 HW accelerated decoding in Android using stagefright library

  21 février 2014, par user3215358

  I`m trying to decode h264 video using HW with Stagefright library.

  i have used an example in here. Im getting decoded data in MedaBuffer. For rendering MediaBuffer->data() i tried AwesomeLocalRenderer in AwesomePlayer.cpp.

  but picture in screen are distorted

  Here is The Link of original and crashed picture.

  And also tried this in example`

  sp<metadata> metaData = mVideoBuffer->meta_data();
  
  int64_t timeUs = 0;
  
  metaData->findInt64(kKeyTime, &amp;timeUs);
  
  native_window_set_buffers_timestamp(mNativeWindow.get(), timeUs * 1000);
  
  err = mNativeWindow->queueBuffer(mNativeWindow.get(), 
  
  mVideoBuffer->graphicBuffer().get(), -1);`
  
  </metadata>

  But my native code crashes. I can`t get real picture its or corrupted or it black screen.

  Please, I need Your help, What i'm doing wrong ?

  Thanks in Advance.

• AsyncTask publishProgress() does not update progress ffmpeg android

  7 février 2014, par jay

  I am using ffmpeg commands for processing media files.In doInBackground() method i have started the process and every time i get the duration , time values and grabbing progress using time and duration and send progress to publishProgress(progress).When i tested on google nexus(android 4.4 kitkat) it is updating progress dialog correctly but this won't happen in below android 4.4 devices.It is updating with an eye blink of time after completion of the process.
  Here is my code :

  protected String doInBackground(String... params)  {
  
              // TODO Auto-generated method stub  
  
              try {
  
                  proc = mProcess.start();
  
              } catch (IOException e) {
  
                  // TODO Auto-generated catch block
  
                  e.printStackTrace();
  
              }
  
              processDuration(proc.getErrorStream());
  
  
  
              // Wait for process to exit
  
              int exitCode = 1; // Assume error
  
              try {
  
                  exitCode = proc.waitFor();
  
              } catch (InterruptedException e) {
  
                  Log.e(TAG, "Process interrupted!", e);
  
              }
  
              onExit(exitCode);           
  
              return null;            
  
          }
  
  
  
          private void onExit(int exitCode) {
  
              // TODO Auto-generated method stub
  
              Log.i("exit code >>>>>>>>..", ""+exitCode);
  
          }
  
  
  
          private void processDuration(InputStream errorStream) {
  
              // TODO Auto-generated method stub
  
              Scanner sc = new Scanner(errorStream);          
  
              // Find duration
  
              Pattern durPattern = Pattern.compile("(?<=Duration: )[^,]*");
  
              String dur = sc.findWithinHorizon(durPattern, 0);
  
              if (dur==null) throw new RuntimeException("Could not parse    duration.");          
  
              String[] hms = dur.split(":");
  
              try{
  
                  totalSecs= Integer.parseInt(hms[0]) * 3600 + Integer.parseInt(hms[1]) *  60 + Double.parseDouble(hms[2]);
  
                  Log.i(" progress>>>>>>>>>>>>>",""+totalSecs);
  
              }catch(NumberFormatException e){
  
  
  
              }
  
              Pattern timePattern = Pattern.compile("(?<=time=)[\\d:.]*");
  
              String match= sc.findWithinHorizon(timePattern, 0);             
  
              while (null != (match = sc.findWithinHorizon(timePattern, 0))) {
  
                  hms = match.split(":"); 
  
                  try{
  
                      processedSecs= Integer.parseInt(hms[0]) * 3600 + Integer.parseInt(hms[1]) *  60 + Double.parseDouble(hms[2]);
  
                  }catch(NumberFormatException e){
  
  
  
                  }
  
                  progress = processedSecs / totalSecs;   
  
                  final int finalProgress=(int)(progress*100);
  
                  try {
  
  
  
                      publishProgress(""+finalProgress);
  
  
  
                      Thread.sleep(1000);
  
                  } catch (InterruptedException e) {
  
                      // TODO Auto-generated catch block
  
                      e.printStackTrace();
  
                  }
  
  
  
              }
  
              publishProgress(""+100);
  
          }
  
  
  
          protected void onPostExecute(String  result) {
  
              super.onPostExecute(result);                
  
              mProgressDialog.dismiss();
  
  
  
          }
  
  
  
          protected void onPreExecute() {
  
              super.onPreExecute();
  
              showDialog(DIALOG_DOWNLOAD_PROGRESS);               
  
          }
  
  
  
          protected void onProgressUpdate(String... progress) {
  
              mProgressDialog.setProgress(Integer.parseInt(progress[0])); 
  
              super.onProgressUpdate(progress);
  
          }
  
  
  
          public Dialog showDialog(int id) {
  
          // TODO Auto-generated method stub
  
          switch (id) {
  
          case DIALOG_DOWNLOAD_PROGRESS:
  
              mProgressDialog = new ProgressDialog(context);
  
              mProgressDialog.setMessage(loading process..");
  
              mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
  
              mProgressDialog.setCancelable(false);
  
              mProgressDialog.setMax(100);
  
              mProgressDialog.setCanceledOnTouchOutside(false);
  
              mProgressDialog.show();
  
              return mProgressDialog;
  
          default:
  
              return null;
  
          }
  
      }
  
      }

  Thanks for Your Help..
  Please help me out this problem..........

• Add watermark to a video using ffmpeg in python

  27 février 2021, par AlphaWolf

  I want to add watermark for my video, with ffmpeg i found command :

  



  ffmpeg -i input.mp4 -i watermark.png -filter_complex "overlay=1500:1000" output.mp4


  



  But it run in cli, not in python code(i cannot found). So have anyway to embbeded it to python code(not call in subprocess) ?
edit : i found pyffmpeg but no guide to use it too.