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• FFMPEG : How to add transparency to watermark logo ? Getting error : "Filter scale2ref has an unconnected output"

  12 septembre 2023, par Danny

  Hey guys I am new to Ffmpeg, I want to resize a watermark logo according to the video size and add transparency to it. The code I have is not working as expected.

  


  This is the code

  


  ffmpeg -i $initialFilePath -i $assetLogoFilePath -y -filter_complex '[1][0]scale2ref=w=oh*mdar:h=ih*0.03[logo][video];[1]format=rgba,colorchannelmixer=aa=0.5[logo];[video][logo]overlay=W-w-5:H-h-5' -c:a copy $temporaryDirectoryPath/$finalVideoPath"


  


  I am getting this error Filter scale2ref has an unconnected output.

  


  Please do help. Thanks

  


• How to install ffmpeg and convert videos to mp4 in PHP ?

  21 octobre 2018, par loot verge

  I downloaded the latest version of ffmpeg.exe. How can I use it in order to convert videos to mp4 using PHP script and Do I need to install the ffmpeg.exe in order for me to use it if so, how can I install it properly ? I am using the latest version XAMPP. I have seen many sites with tutorial but none of the have the proper information to install and use ffmpeg. I hope you guys can help me. I tried to copy the ffmpeg.exe in the folder of my site and tried the code below I am getting an error

  if(exec("ffmpeg.exe")){
  
      echo "ok";
  
  }
  
  else {
  
      echo "error";
  
  }

• Adding Audio to an existing Video [on hold]

  12 mars 2019, par roma

  I am trying to add a new audio to an existing video in my Android app. i have used FFMPEG but it takes time.Even i tried with MP4 Parser but still didn’t work.

  FFMPEG command used is
  val cmd = arrayOf("-i", video !!.path, "-i", audio !!.path, "-c:v", "copy", "-c:a", "aac", "-strict", "experimental", "-map", "0:v:0", "-map", "1:a:0", "-shortest", outputLocation.path)

  For example if i have a 30 seconds video, to add a new audio FFMPEG takes 30 seconds.(Same as duration of video) but i still want it to be fast enough so that it completes this task of adding audio to video in just 4 or 5 seconds.

  If you see in TikTok App it take takes fraction of seconds to add a new audio to an existing video. Can you guys help me or atleast let me know which library or framework or API’s i should use in android to make this task faster enough.