Recherche avancée

Sur d’autres sites (8059)

• FFMPEG audio not delaying properly

  1er avril 2022, par Spartan 117

  I am trying to mix two audio files together, with one audio being delayed. Here are the file details

  


  Audio 1 - https://pastebin.com/vkYsH88e, "startTime" : "03/23/2022 21:20:27", "endTime" : "03/24/2022 01:06:11"

  


  Audio 2 - https://pastebin.com/Gs4V96GQ, "startTime" : "03/24/2022 01:05:30", "endTime" : "03/24/2022 04:21:41"

  


  As you can see from the paste bin and the json property, Audio two starts about 3 hours and 45 minutes after Audio one, here is how i am trying to mix them

  


  ffmpeg -i RTb295d0534191e1acb22a45bb971a12e6.mka -i RT103bfe5f4b129860f69cd8e820f3a10b.mka -filter_complex "[1:a]adelay=13500s:all=1[apad]; [0:a][apad]amix=inputs=2:weights=1|1[aout]" -map [aout] combined_audio.mka


  


  Here is the output of that mixture - https://pastebin.com/KAsw0905

  


  Files have been uploaded here, if anyone wants to test - https://easyupload.io/m/xveng4

  


  The issue i'm having ? Based on the parameters provided, the 2nd audio file should start playing after 3 hours and 45 minutes. Instead, it plays after 5 hours and 45 minutes. I'm new to FFMPEG and have been having trouble figuring this out. Any ideas ?

  


• AS3 NetStream AppendBytes Seek issue

  18 novembre 2015, par AntBirch

  I’m having trouble with NetStream in AS3. The project I am working on allows users to browse a video (locally) and play it back. The issue I am having is that netStream.seek(0); from what I can tell it doesn’t do anything, although I get inside a NetStatusEvent function and NetStream.Seek.Notify is triggered. I’m using NativeProcess and the following function is this makes any difference.

  public function ProgressEventOutputHandler(e:ProgressEvent):void {
  
      videoByteArray = new ByteArray();
  
      nativeProcess.standardOutput.readBytes(videoByteArray, 0, nativeProcess.standardOutput.bytesAvailable);
  
      netStream.appendBytes(videoByteArray);
  
  }

  Am I missing something here ? I am pausing netStream before using netStream.seek(0);.

  EDIT :

  In an attempt to fix this issue I followed the instructions by VC.One I’ve done the following :

  • Moved videoByteArray = new ByteArray(); to my init function and also created tempVideoByteArray = new ByteArray(); in this function.

  • Update my ProgressEventOutputHandler function so that it no longer created a new ByteArray for videoByteArray and changed this line - nativeProcess.standardOutput.readBytes(videoByteArray, videoByteArray.length, nativeProcess.standardOutput.bytesAvailable);

  I have changed nothing else and now the video will not load. If I allow a new ByteArray to be created inside the ProgressEventOutputHandler function the video does load again.

• Apply sound effects on a video file

  31 mars 2013, par talhamalik22

  I am a little miss guided here and it seems i am totally lost. I am developing an android app and its core idea is to develop a video recorder and video player that applies some sound effects on the voice of the people or any sound that it records. Sound effect means that if i make a video of a person who is giving some speech then there should be no effect on video but his/her voice should appear like voice in talking tom cat app. I hope you understand the idea. Similar app is Helium Booth you can check it here. I am trying to use libraries like libSonic, libpd and tried to use XUGGLE too.
  Read somewhere that Xuggle is not really developed for mobile devices so left it. Now what i want is that it should apply this effect on voice on the run time i.e while recording the pitch of the sound should be alterd and saved immediately. And what i am getting with these libraries is that i can apply sound effect after video is recorded. So it means i need to rip the audio from the video and then apply the change in pitch and frequency and again concatenate this audio file with the old video file. And i have no idea how to do it.
  Please show me the right approach and tools if possible.

  Regards