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• How to convert audio files from mp4 to mp3 using applescript ?

  15 décembre 2017, par MBUST

  Can someone please help me understand how to convert audio files from mp4 to mp3 using AppleScript ?

  I have tried scripting VLC or Sound Studio but the commands don’t seem to come close to doing that. I downloaded and installed ffmpeg but I don’t know the syntax to use.

  I tried something like this with ffmpeg :

   tell application "Finder"
  
  set CurrentPath to container of (path to me) as alias
  
  set OriginalFile to CurrentPath & "ASProcessing:SoundToProcess.mp4" as string
  
  set NewFile to CurrentPath & "ASProcessing:NewFile.mp3" as string
  
  
  
  end tell
  
  
  
  
  
   set outputFile to POSIX path of OriginalFile
  
   set inputFile to POSIX path of NewFile
  
   do shell script ffmpeg something, something

  But clearly I’m missing most of the script syntax. Eventually, I would do a repeat loop to go through a set of files.

  Sorry that I can’t be more specific. I’m pretty lost with this. What I do know is that I do not want to use Automator. I need something like AppleScript.

  Thanks.

  mbust

• how can I use the openCV FFMPEG video I/O rather than the DirectShow one in Windows ?

  2 mai 2012, par octi

  So I'm trying to write a video using the openCV videoWriter as such :

  writer=cv.CreateVideoWriter(path+"test_output.avi",-1,fps,(W,H),1)

  So instead of supplying the FOURCC I supplied -1 in order to see what codecs I have available.
  Result was Microsoft RLE, Microsoft Video 1, Intel YUV, and Uncompressed.

  The reason is that when configuring openCV using CMAKE for Visual Studio 10 x64, this is what I have in the video i/o :
  Video I/O : DirectShow

  Is there a way to switch this to FFMPEG ? I know the ffmpeg dll is present in \3dparty\ffmpeg.
  I looked for Cmake FFMPEG flags but found none whatsoever. The weird thing is in the CmakeLists.txt in the opencv root under the video section :

  if(UNIX AND NOT APPLE)
  
  <ffmpeg stuff="stuff">
  
  elseif(WIN32)
  
      status("  Video I/O:"        HAVE_VIDEOINPUT     THEN DirectShow ELSE NO)
  
  endif()
  
  </ffmpeg>

  So it seems to me that opencv automatically switched to DirectShow and gives no choice of using FFMpeg.
  Or rather can one upgrade Driectshow to support other formats such as Divx or h264 ?
  Any ideas ?

• is that possible to serv hls and dash mpeg both at a time

  12 février 2020, par Rahul M

  actually i’m a kind a newbie to the Nginx RTMP server. I had setup my nginx.conf file to accept both hls and dash-mpeg. but the now problem is at a once I can able to serve either of the hls or dash-mpeg. so now my question is that possible to serve both hls and dash-mpeg at the same time for two different videos ? I’m streaming video from OBS Studio.
  here are my MPEG and hls code in nginx.conf file

  rtmp {
  
  server {
  
      listen 1935; # Listen on standard RTMP port
  
      chunk_size 4000;
  
  
  
      application show {
  
          live on;
  
          # Turn on HLS
  
          hls on;
  
          hls_path /nginx/hls/;
  
          hls_fragment 3;
  
          hls_playlist_length 60;
  
          deny play all;
  
      }
  
      application dash {
  
              live on;
  
              dash on;
  
              dash_path /nginx/dash;
  
  
  
      }
  
  }

  }

  thank you advance.