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• Adding watermark bitmap over video in android : 4.3's MediaMuxer or ffmpeg

  24 novembre 2018, par Alin

  Here is my scenario :

  • Download an avi movie from the web
  • Open a bitmap resource
  • Overlay this bitmap at the bottom of the movie on all frames in the background
  • Save the video on extarnal storage
  • The video length is 15 seconds usually

  Is this possible to achieve using MediaMuxer ? Any info on the matter is gladly received

  I’ve been looking to http://bigflake.com/mediacodec/#DecodeEditEncodeTest (Thanks @fadden) and it says there :

  "Decoding the frame and copying it into a ByteBuffer with
  glReadPixels() takes about 8ms on the Nexus 5, easily fast enough to
  keep pace with 30fps input, but the additional steps required to save
  it to disk as a PNG are expensive (about half a second)"

  So having almost 1 sec/frame is not acceptable. From what I am thinking one way would be to save each frame as PNG, open it, add the bitmap overlay on it and then save it. However this would take an enormous time to accomplish.

  I wonder if there is a way to do things like this :

  1. Open video file from external storage
  2. Start decoding it
  3. Each decoded frame will be altered with the bitmap overlay in memory
  4. The frame is sent to an encoder.

  On iOS I saw that there a way to take the original audio + original video + an image and add them in a container and then just encode the whole thing...

  Should I switch to ffmpeg ? How stable and compatible is ffmpeg ? Am I risking compatibility issues with android 4.0+ devices ? Is there a way to use ffmpeg to acomplish this ? I am new to this domain and still doing research.

  ---

  Years later edit :
  Years have passed since the question and ffmpeg isn’t really easy to add to a commercial software in terms of license. How did this evolved ? Newer versions of android are more capable on this with the default sdk ?

  ---

  Some more time later edit

  I got some negative votes for posting info as an answer so I’ll edit the original question. Here is a great library which, from my testing does apply watermark to video and does it with progress callback making it a lot easier to show progress to the user and also uses the default android sdks. https://github.com/MasayukiSuda/Mp4Composer-android

  This library generate an Mp4 movie using Android MediaCodec API and apply filter, scale, and rotate Mp4.

  Sample code, could look like :

  new mp4Composer(sourcePath, destinationPath)
  
          .filter(new GlWatermarkFilter(watermarkBitmap)
  
          .listener(){
  
                @Override 
  
                private void onProgress(double value){}
  
  
  
                @Override 
  
                private void onCompleted(double value){
  
                    runOnUiThread( () ->{
  
                       showSneakbar
  
                    }
  
                }
  
  
  
                @Override 
  
                private void onCancelled(double value){}
  
  
  
                @Override 
  
                private void onFailed(Exception e){}
  
  
  
          }).start();

  Testing on emulator, seems to work fine on android 8+ while on older generates a black video file.However, when testing on real device seems to work.

• Convert .heic to .jpg using ffmpeg ?

  19 novembre 2018, par Ketan Chauhan

  Using MP4Box :

  MP4Box -info IMG_5915.HEIC

  I get :

  prof colour profile not supported

  prof colour profile not supported

  Root Meta type : "pict" - 52 resource item(s)

  Primary Item - ID 49

  Item #1 - ID 1 - Name :
  .

  .

  .

  Item #49 - ID 49 - Name :

  Item #50 - ID 50 - Name : Item #51 - ID 51 - Name :

  File has no movie (moov) - static data container

  Then if I extract all of these :

  for i in seq 51 ; do MP4Box -dump-item $i:path=item$i.hevc
  IMG_5915.HEIC ; done

  Then if i continue, and convert these tiles to jpeg with ffmpeg it convert one tile to jpeg i.e it creates 51 HEVC tiles.

  ffmpeg -i item1.hevc -frames:v 1 -vsync vfr -q:v 1 -an image1.jpg

  How can I combine these tiles into a single jpg file ?

• PHP exec() function command finished but last function not execute

  12 juin 2018, par Noeeka

  The PHP file should execute FFmpeg command after this command finished it should take data into the database. However, I found that the exec($command--FFmpeg) has been completed and it run pretty well but the data is not in the database.

  I have set php.ini ignore_user_abort = On

  It could run the PHP process in the background

  my could is as follows

  set_time_limit(0);
  
  $tumbfileName = time();
  
  $filepath = dirname(dirname(dirname(__FILE__))) . "/files/video/";
  
  $cmd = 'ffmpeg -i ' . dirname(dirname(dirname(__FILE__))).$content . ' -c:v libx264 -strict -2 ' . $filepath . "post_" . $tumbfileName . '.mp4';
  
  exec($cmd, $output, $error);
  
  
  
  $cmdImg="ffmpeg -y -ss 2 -i ".dirname(dirname(dirname(__FILE__))).$content." -vframes 1 -f image2 -s 400*300 ".$filepath . "notice_thumb_" . $tumbfileName . '.jpg';
  
  //$cmdImg = "ffmpeg -i " . dirname(dirname(dirname(__FILE__))).$content . " -f image2 -ss 10 -s 400*300 -vframes 10 " . $filepath . "notice_thumb_" . $tumbfileName . '.jpg';
  
  exec($cmdImg, $outputImg, $errorImg);
  
  $data = array(
  
          'content' => "/files/video/"."post_" . $tumbfileName . '.mp4',
  
          'author' => 'management',
  
          'deadline' => $deadline,
  
          'type' => $type,
  
          'datetime' => time(),
  
          'thumb' => "/files/video/"."notice_thumb_" . $tumbfileName . '.jpg'
  
  );                                                          
  
  $flag = $this->db->insert('notice_info', $data);