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• Use mmpeg to encode AUDIO+IMAGE into a VIDEO for YouTube

  12 juin 2014, par pablosz

  I need to generate a video containing a single image throughout the duration of the audio comming from an audio file. This video should be compatible with the parameters supported by YouTube.

  I’m using ffmpeg.

  I was trying various configurations explained right here and in other forums but not all have worked well.

  I’m currently using these settings :

  ffmpeg -i a.mp3 -loop 1 -i a.jpg -vcodec libx264 -preset slow -crf 20 -threads 0 -acodec copy -shortest a.mkv

  Where a.mp3 containing audio, a.jpg contains the image and a.mkv is the name of the resulting video.

  Using these parameters a.mkv works well on YouTube and can be played with Media Player Classic ; but KMPlayer only recognizes the audio, showing a blank image as background.

  My questions are two :
  1 - There is something wrong that causes KMPlayer to fail ?
  2 - Is there any configuration that can deliver the video faster, of course losing some compression ?

  Muchas gracias !

• ffmpeg multiple overlays at different times

  14 octobre 2017, par TheOctagon

  I have written a bash script which cycles through various RTMP live streams and switches every thirty seconds.
  I have a PNG sequence which plays at the start of the video (blindRev-%d.png). A blind is pulled up, revealing the stream.

  28 seconds later, I would like it to come back down to cover the stream so that when the next stream is loaded, it retracts to reveal the next stream in sequence once again (blind-%d.png). I’ve tried using itsoffset to accomplish this. No audio is required.

  However, only the first PNG sequence is played, the second never seems to happen.

  The command I am using is :

  ffmpeg -i rtmp://localhost/live/$stream -i blind/blindRev-%d.png -itsoffset 28 -i blind/blind-%d.png -filter_complex overlay -an -f flv rtmp://localhost/live/All

  What am I doing incorrectly ?
  Many thanks.

• videoView seekTo not working after video edited using ffmpeg library - android

  22 juin 2015, par Salmaan

  I am using videoView to play video. And on a button click I want video to seekTo some specific position.
  This is the code i am using

  mVideoPlayer.seekTo(specificMills);  

  This is working perfectly fine when I am using this for video made by default camera application.
  But when I edit the video using FFMPEG and then use the same code. It dont works :(

  I played the same video in default video player but it reacts same.
  Video starts from the beginning, as if it have a single starting frame. Wherever you seekTo it starts over.

  This is FFMPEG command I am using

         String[] ffmpegCommandImages = {
  
                      "path/to/ffmpeg",
  
                      "-i", videoPath,
  
                      "-b:v", "1000k",
  
                      "-vf", "scale=-2:576",
  
                      "-vcodec", "libx264",  
  
                      "-c:a", "aac", 
  
                      "-strict", "-2",
  
                      "-b:a", "128k",
  
                      "-threads", "5", 
  
                      "-preset", "ultrafast",
  
                      to };