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• Input raw audio 512 floating-point values into FFMPEG ?

  29 septembre 2021, par NTPHCM

  In ActionScript 3, I use SoundMixer.computeSpectrum() to takes a snapshot of the current sound wave playing on the stage and places it into the specified ByteArray object.

  


  I want to write the ByteArray into FFMPEG (by std -i pipe:0), but the ByteArray object created is fixed to 512 floating-point values and FFMPEG seem doesn't support that value. The sound in the output is corrupted.

  


  Here's a part of my code in AS3 :

  


  stage.addEventListener(Event.ENTER_FRAME, update);
function update(e:Event):void{
    var soundBA:ByteArray = new ByteArray();
    SoundMixer.computeSpectrum(soundBA, false, 0);
    process.standardInput.writeBytes(soundBA);
}


  


• ffmpeg : StreamNotFound error

  27 janvier 2017, par KMG

  I’m using Adobe Media server and push streams to this server using FMLE.

  My stream name : appvideo

  When I tried to pull the video from the server using ffmpeg/ffplay, I’m not getting "stream not found error". Whereas rtmpdump can stream the video.

  After I see the logs, all the ffmpeg request logs have a stream name with extension .flv like [appvideo.flv]. But rtmpdump not append this extension [ like appvideo].

  FFMpeg/ffplay log in Media server :

  play    stream  2017-01-27  02:26:17    GMT appvideo    10.11.12.202    32715   11  17  _defaultRoot_   _defaultVHost_  live    _definst_   0   404 183.82.250.50   rtmp    -   rtmp://10.11.12.202:443/live    rtmp://10.11.12.202:443/live    -   --  4702122229742256497 3135    3631    normal  appvideo    -   -   rtmp://10.11.12.202:443/live/appvideo.flv   rtmp://10.11.12.202:443/live/appvideo.flv   -   flv 0   0.000000    0   -   0   0   -   -   -   -   1   -   --  -   -   -   -   -   -   -1  -1.000000   -

  Not sure why request append .flv extension at last like this : rtmp ://10.11.12.202:443/live/appvideo.flv

• Customizing HomeKit (using HomeBridge plug-in or building custom app ?)

  5 mai 2019, par Fréderic Cox

  I am running HomeBridge on a RBPi3 and displaying my home accessories through an iPad hub running the Home app.

  I really like it but I’m missing some things like a big clock (The iPad is hanging on my kitchen wall with screen-on display most of the day), a summary of my Google Calendar and some other nice widgets. It is not possible to add those widgets to the Home app (typically so with Apple software .. :-)) but I’m looking for a solution to achieve this.

  I have two options (at least that’s what I think) :

  1) Build my own iPad using the HomeKit API where I can then customize the app appearance and add the widgets the way I want.

  2) Using HomeBridge FFMpeg camera plugin and creating a video stream containing a big clock and some calendar item titles.

  Option 1 is the most work but also provides the flexibility. Option 2 is easier but limited in functionality. Option 2 might also be a performance overkill to have a video stream ? The video stream would provide me with the advantage that the camera widget in HomeKit is pretty big and clearly visible from distance (the clock at least).

  What do you think is the best option and how would option 2 be achieved ? How can I set up a video stream from for example a SWF file created in Adobe Animate ? Or how to achieve this dynamic info inside a video stream ?

  Any tips are most welcome ! Thanks