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• Video won't play with Android's native MediaPlayer, however it plays with Dropbox's video player

  12 novembre 2014, par Nachi

  I’m having trouble playing a certain .3gp file (from a Dropbox link) with Android’s MediaPlayer. However the file magically plays without problems from the Dropbox Android app.

  I’m trying to play it using this :

  Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
  
  intent.setData(Uri.parse("https://www.dropbox.com/s/zpiqwmxka6llavt/SketchyFile.3gp"));
  
  startActivity(intent);

  and my manifest contains

  which gives a "Can’t play this video" error.

  

  Logcat shows :

  I/NuCachedSource2(89): new range: offset= 2245017
  
  I/ChromiumHTTPDataSource(89): connect to https://dl.dropbox.com/0/view/a1crokuhpprsaeo/SketchyFile.3gp @2245017
  
  I/NuCachedSource2(89): ERROR_END_OF_STREAM
  
  E/MediaPlayer(3629): error (1, -2147483648)
  
  E/MediaPlayer(3629): Error (1,-2147483648)
  
  D/VideoView(3629): Error: 1,-2147483648

  If I try to play it from the Dropbox Android app, Dropbox’s video player has no problem playing it.

  

  According to ffmpeg’s ffprobe tool I could verify that the media type is not something exotic to Android.

  Is Dropbox performing some weird transcoding voodoo and is there a way I can make this work in a similar way ?

  EDIT : Here’s some more insight into DropBox’s encoding voodoo.

• Android and Ffmpeg. Play video (audio and video syncing WITHOUT USING SDL)

  21 janvier 2014, par user1885632

  I have build ffmpeg library and made simple project where I decode video stream and show it on SurfaceView. Now I need to play sound stream of my video file. And the biggest problem for me is synchronization. I saw tutorials but all of them show how to do this using SDL. But for this I need to install SDL, build it (and there are some trouble for me, because of my project structure). So I don't want to use SDL. Are there any ways how to play a videofile with sound synchronously without using SDL ?

• android and ffmped. decode and play audio and video

  21 janvier 2014, par user1885632

  I have compiled ffmpeg for android. Now I am able to decode vide frames with the help of ffmeg and then show them on a surfaceview in android using ndk. I have read a lot of tutorials and all of them explain how to play decoded streams with the help of Sdl. I have a lot of problems while compiling SDL so I want to ask can we play decoded audio stream without sdl, may be we should return decoded audio packages back to Java and then play them with the help of audiotrack class ? Can you give me some advices ? Thank you.