Recherche avancée

Sur d’autres sites (7494)

• 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

• 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);
}


  


• Vertical video play does not sync with multiple stacked video

  5 novembre 2018, par Sabha

  I dont know if I have wrote the subject well and if that can be understood. Nevertheless, here is an explanation

  I have 7 videos of different dimensions where the width is same (1080). I wish to place them one below the other to get a full hd vertical video (1080x1920). I tried the -filter_complex vstack filter in ffmpeg and got all the videos aligned one below the other and I am getting a perfect 1080x1920 full hd vertical video but they dont sync with each other. Once the videos are in sync, I need to put an audio too which should also sync with the in-sync video that will be made.

  There is so much of complexity. Please advice how do I make them sync. Is there any software that can allow me to put 7 videos one below the other in a timeline ? (if not 7, atleast 3-4 videos). Please advice where and how to start.

  Is there any option in Adobe Premier or any other software ?

  Thanks

  EDIT : I am doing a very long procedure to combine all 7 videos vertically

  first i use

  ffmpeg -i video1.mp4 -i video2.mp4 -preset veryslow -filter_complex vstack video12.mp4

  and then

  ffmpeg -i video12.mp4 -i video3.mp4 -preset veryslow -filter_complex vstack video123.mp4

  so on and so forth

  Is there a better way to do it all in one command ?