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• Editing and restreaming rtmp stream in python

  31 mai 2020, par REgorion

  There is an nginx rtmp lan server that is being streamed from OBS. There is a Python script that determines whether there is nsfw content on the screen based on a screenshot. The result is calculated in real time and sent over tcp. The task of another script is to Get the result over tcp - it can do this. Receive a stream from an rtmp lan server and overlay the video stream a second before nsfw content appears. In theory, I need to receive the stream and send it with a delay of a second, and if the signal comes over tcp, then overlay the video.

  



  I don't understand how I can implement this buffer, write stream to it, process it, and publish it. The overlay can be applied via opencv, but the issue of implementing the buffer and posting it remains open. I looked in the direction of ffmpeg, but I don't understand how to organize streaming.

  



  What libraries can help me solve this problem ? Is there any related literature ?

  



  Sorry for my english

  


• Get data from native process on Android

  22 octobre 2013, par Gonzalo Solera

  I´m converting a video with my app, and I got it using the FFmpeg library. I´m using a static compiled version of FFmpeg and I run my command like this :

          //Conversion video
  
          try {
  
              Process p = Runtime.getRuntime().exec("data/data/package/cache/ffmpeg -i "   path   " -g "   String.valueOf(keyFrames)   " -s 720x480 -vcodec libx264 -an -y /sdcard/lowResolution.mp4");
  
              p.waitFor();
  
          } catch (IOException e) {
  
              // TODO Auto-generated catch block
  
              e.printStackTrace();
  
          } catch (InterruptedException e) {
  
              // TODO Auto-generated catch block
  
              e.printStackTrace();
  
          }
  
          Log.d(TAG, "Video convertido"); 

  It works well but it takes me too much time, so I would like to put a progress bar, so I should need to read output events of the process (the same output I can see when I execute the command in terminal) in order to know how long will it take or something like that.

  Sorry for my english and thanks for help !!

• Is there a way to encode multiple audio and sub streams managed by language

  17 juillet 2020, par ScarVite

  so, i have a folder full of .mkv's, i have a one liner which can convert them all to mp4's
these new files now have multiple audio and subtitle streams, one eng, one ger one jap and for subtitles the same, is there an way with which i can easily specify use f.e. German audio and burn eng subtitles.
My One Liner :

  


  for /R %f IN (*.mkv) DO ffmpeg -i "%f" -c copy "%~nf.mp4"


  


  How would i have to modify this one Liner for it to work.
I found out that with -vf subtitles=foo.ass i can hardcode subtitles, but how do i select one audio and or subtitle stream from included with the file ?
and how would i select f.e. a audio atream but none subtitle stream

  


  I found out, that with

  


  -map 0:V -map 0:a:m:language:ger -map 0:s


  


  I can get a file with which only has the german audio files, but now i need the same for the subtitles, to only include the english ones