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• Mirror flip video taken from front camera in Android

  5 août 2016, par DAVIDBALAS1

  I have a camera application which is able to capture images and record videos. However, when capturing images or recording videos from the device front facing camera the result is flipped, like you are looking at the mirror. I want to flip it again so it will look normal. I managed to do this with images by flipping the Bitmap using Matrix :

     public Bitmap flip(Bitmap bitmap) {
  
          int w = bitmap.getWidth();
  
          int h = bitmap.getHeight();
  
          Matrix matrix = new Matrix();
  
          float[] mirrorY = {-1, 0, 0, 0, 1, 0, 0, 0, 1};
  
          Matrix matrixMirrorY = new Matrix();
  
          matrixMirrorY.setValues(mirrorY);
  
          matrix.postConcat(matrixMirrorY);
  
          matrix.postRotate(90);
  
          return Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);
  
      }

  I can’t figure out how to flip videos taken by MediaRecorder, I know I can run a ffmpeg command :

  -i /pathtooriginalfile/originalfile.mp4 -vf hflip -c:a copy /pathtosave/flippedfile.mp4

  but I don’t know how to run a ffmpeg command from code and I can’t find a different way. There are a lot of topics discussing this issue but I couldn’t find a solution to work. Notice : It is possible, Snapchat got this to work somehow.

  Thanks.

  P.S Sorry for my English

• Is it possible to stream netflix in either an embedded version of chromium or using ffmpeg ?

  24 février 2015, par OzBarry

  I’m looking into building an all-in-one media streaming application for my raspberry pi2, since there are currently very few options, and it’s scalable to other systems. The biggest hurdle I’ve found in requirements gathering is being able to stream netflix.

  There have been very few attempts at getting chromium to stream netflix, and even fewer on armv7h systems, so I’m trying to look at alternatives.

  My first thought is using a combination of curl and ffmpeg, and I think this would somehow work, however this doesn’t solve the issue with the DRM.

  Another option would be to stream from another computer into my application. This solves the DRM issue, but encumbers my software setup, burdens users to have at least one computer that can also stream netflix, and will suffer from lag (netflix -> computer a -> computer b). The last point can be sorted out with buffering, but that may not be ideal, since it adds stress to the raspberry pi machine.

  As a side note, I am using SDL2 for rendering, so I would be fine with a binary library that decodes the frames and audio, and sends it directly to a SDL renderer ad audio stream without allowing me to modify/copy it.

  Does anything like these options exist ? I really just want to get a legit stream from netflix if possible, while not interferring with the DRM.

• Symfony FFMPEG configuration problems

  8 juillet 2014, par harisK92

  Hi I downloaded and installed pulse00/symfony-ffmpeg bundle I installed it with
  success and load it in kernel but I have strugle with configurating it.

  Config.yml

  dubture_f_fmpeg:
  
      ffmpeg_binary:  C:\FFMPEG\bin\ffmpeg.exe
  
      ffprobe_binary: C:\FFMPEG\bin\ffprobe.exe

  I wrote this test code in my controller

  $ffmpeg=$this->get("dubture_ffmpeg.ffmpeg");
  
  $video=$ffmpeg->open('SomeVideo.mp4')
  
                ->getFormat();

  And I get this error

  2/2    Unable to probe SomeVideo.mp4
  
  1/2    ExecutionFailureException: ffprobe failed to execute command "C:\FFMPEG\bin\ffprobe.exe" "SomeVideo.mp4" "-show_streams" "-print_format" "json"

  Questions :

  1. What did I do wrong ?
  2. Do I need to edit my php.ini ?
  3. Are there any other alternatives for symfony2 ?