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• Get bitmap / thumbnail from a streaming video with format like .mp4, .3gp in Android ?

  12 janvier 2016, par Androzr

  I am working on ListView which on item click redirecting to a video link.
  I explain my problem :

  I have three types of videos :

  • Youtube
  • Dailymotion
  • Other formats from streaming video like this one : Video Link

  I am trying to get thumbnail to get it in my ImageView from my item of my ListView. I encoutered a problem, I get Youtube thumbnail, Dailymotion thumbnail but I couldn’t get thumbnail for other formats.

  I tried to use MediaMetaDataRetriever class but nothing happens.

  Here is the line where I tried to get my bitmap :

  We are in my VideoAdapter class in the getView method. holder is my ViewHolder class and thumbVideo is my ImageView.

  Here is differents lines I tried :

  holder.thumbVideo.setImageBitmap(createVideoThumbnail(m_Context, Uri.parse(m_Video.getM_Preview())));

  m_Video is my Video class and the method getM_Preview() is getting the link of video thumbnail.

  Here is my createVideoThumbnail(Context context, Uri uri) method :

      public Bitmap createVideoThumbnail(Context context, Uri uri) {
  
      Bitmap bitmap = null;
  
      MediaMetadataRetriever retriever = new MediaMetadataRetriever();
  
      try { 
  
          retriever.setDataSource(context, uri);
  
          bitmap = retriever.getFrameAtTime(-1);
  
      } catch (RuntimeException ex) {
  
      } finally { 
  
          try { 
  
              retriever.release();
  
          } catch (RuntimeException ex) {
  
          } 
  
      } 
  
      return bitmap;
  
  }

  I am looking an answer for 4 days. If anybody know how I can do, it’ll be helpful

• Revision 33048 : Un flv n’a pas forcément de vidéo associée ... on écrit les metadatas ...

  18 novembre 2009, par kent1@… — Log

  Un flv n’a pas forcément de vidéo associée ... on écrit les metadatas avant pour être sûr

• Started Programming Young

  6 septembre 2011, par Multimedia Mike — Programming

  I have some of the strangest memories of my struggles to jump into computer programming.

  Back To BASIC
  I remember doing some Logo programming on Apple II computers at school in 5th grade (1987 timeframe). But that was mostly driving turtle graphics. Then I remember doing some TRS-80 BASIC in 7th grade, circa 1989. Emboldened by what very little I had learned in perhaps the week or 2 we took in a science class to do this, I tried a little GW-BASIC on my family’s “IBM-PC compatible” computer (they were still called that back then). I still remember what my first program consisted of. Even back then I was interested in manipulating graphics and color on a computer screen. Thus :

  10 color 1
  20 print "This is color 1"
  30 color 2
  40 print "This is color 2"
  ...
  

  And so on through 15 colors. Hey, it did the job– it demonstrated the 15 different colors you could set in text mode.

  What’s FOR For ?
  That 7th grade computer unit in science class wasn’t very thick on computer science details. I recall working with a lab partner to transcribe code listings into a computer (and also saving my work to a storage cassette). We also developed form processing programs that would print instructions to input text followed by an “INPUT I$” statement to obtain the user’s output.

  I remember there was some situation where we needed a brief delay between input and printing. The teacher told us to use a construct of the form :

  10 FOR I = 1 TO 20000
  20 NEXT I
  

  We had to calibrate the number based on our empirical assessment of how long it lasted but I recall that the number couldn’t be much higher than about 32000, for reasons that would become clearer much later.

  Imagine my confusion when I would read and try to comprehend BASIC program code I would find in magazines. I would of course see that FOR..NEXT construct all over the place but obviously not in the context of introducing deliberate execution delays. Indeed, my understanding of one of the fundamental building blocks of computer programming — iteration — was completely skewed because of this early lesson.

  Refactoring
  Somewhere along the line, I figured out that the FOR..NEXT could be used to do the same thing a bunch of times, possibly with different values. A few years after I had written that color program, I found it again and realized that I could write it as :

  10 for I = 1 to 15
  20 color I
  30 print I
  40 next I
  

  It still took me a few more years to sort out the meaning of WHILE..WEND, though.