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• openCV 2.4.10 lost cinepak radius codec

  28 octobre 2014, par user3652747

  I am working on a Windows 7 64 bit platform.

  Before :
  I was using OpenCV 2.4.6, compiled by myself with CodeBlocks and a MinGW compiler. When recording a video, I was able to select the Cinepak Radius Codec (CVID) and all my world was shinny. I don’t remember tweaking a lot the configuration of CMAKE when creating the CodeBlocks project to compile OpenCV.

  Now :
  I download the last stable version OpenCV 2.4.10 and I have to use this one. So I applied the same recipe : CMAKE, CodeBlocks project, compile. But then I cannot choose the Cinepak Radius Coded while creating a new video.

  Questions :
  Did the Codec disappears from OpenCV or did I miss one flag in the CMAKE configuration ?

  Of course I tried other config, but to me, I just had to activate WITH_FFMPEG and WITH_VFW flags. Do you have any tips on that ?

  Thanks !

• ffmpeg save mp3 file from available wss stream

  11 juillet 2021, par phoenixAZ

  In a hello world node.js app I am succeeding in getting a feed from twilio conference and sending to the google speech to text. Concurrently I want to control recording to mp3 of the available audio stream (programmatically call start and stop). The was is subscribed to audio stream but I don't know how to attach ffmpeg to the local stream. I have tried :

  


              // ffmpeg('rtsp://host:port/path/to/stream')
            //experimenting telling it to use the local stream
            //
            //ffmpeg(wss.addListener)  //invlaid input error
            //ffmpeg(wss.stream) //thsi hits the console error below
            ffmpeg(wss.stream)
            .noVideo()
            .audioChannels(1)
            .audioBitrate(128)
            .duration('1:00')
            .on('end', function () { console.log('saved mp3'); })
            .on('error', function (err) { console.log('error mp3'); })
            .save('/path/to/output.mp3');


  


  Any suggestions are welcomed. I am in a node.js project

  


• Multiprocessing | Multithreading ffmpeg in python

  13 octobre 2016, par lordcantide

  I am developing a python WSGI script to interface with an HDHomeRun Prime. In a perfect world it will pass URI values as commands to FFMPEG and display the resulting stream in a browser. I have the "show stuff in browser" and the "pass instructions to FFMPEG" parts working fine, but I do not have them working simultaneously.

  1) Given that this middleware is being used to transcode MPEG-2 to h.264, does it make more sense to use multiprocessing or multithread to start and stop the respective processes ?

  2) If the WSGI script is brokering the initiation of FFMPEG feeds (if the input feed isn’t already brokered) and connecting clients to the associated FFServer streams, does mean I’ll need to use some sort of pool to keep track of the middleware’s activities ?