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• Add image overlay for each millisecond the video using ffmpeg and php

  21 octobre 2016, par Domenike

  I need to add an image and different position for each millisecond the video frame, using php and ffmpeg.
  For example :
  In the first second I add an image in the X position, the next second another image in the position X.
  If you use the command directly on the terminal, the conversion is successful. But in PHP I have difficulties.
  In php, use the following command :

  <?php
  
  shell_exec('C:\\ffmpeg\\bin\\ffmpeg.exe -i C:\\ffmpeg\\bin\\vid.mp4 -i C:\\ffmpeg\\bin\\1.png -filter_complex "[0:v][1:v] overlay=100:25:enable=\'between(t,1,1.5)\'"  C:\\ffmpeg\\bin\\output1.mp4');
  
  sleep(20);
  
  echo "1";
  
  shell_exec('C:\\ffmpeg\\bin\\ffmpeg.exe -i C:\\ffmpeg\\bin\\output1.mp4 -i C:\\ffmpeg\\bin\\2.png -filter_complex "[0:v][1:v] overlay=10:25:enable=\'between(t,1.5,2)\'"  C:\\ffmpeg\\bin\\output2.mp4');
  
  sleep(50);
  
  echo "2";
  
  shell_exec('C:\\ffmpeg\\bin\\ffmpeg.exe -i C:\\ffmpeg\\bin\\output2.mp4 -i C:\\ffmpeg\\bin\\3.png -filter_complex "[0:v][1:v] overlay=250:25:enable=\'between(t,2,2.5)\'"  C:\\ffmpeg\\bin\\output1.mp4');
  
  sleep(20);
  
  echo "3";
  
  shell_exec('C:\\ffmpeg\\bin\\ffmpeg.exe -i C:\\ffmpeg\\bin\\output1.mp4 -i C:\\ffmpeg\\bin\\4.png -filter_complex "[0:v][1:v] overlay=300:25:enable=\'between(t,3,3.5)\'"  C:\\ffmpeg\\bin\\output2.mp4');
  
  sleep(20);
  
  echo "4";
  
  shell_exec('C:\\ffmpeg\\bin\\ffmpeg.exe -i C:\\ffmpeg\\bin\\output2.mp4 -i C:\\ffmpeg\\bin\\5.png -filter_complex "[0:v][1:v] overlay=350:25:enable=\'between(t,4,4.5)\'"  C:\\ffmpeg\\bin\\output1.mp4');
  
  sleep(70000);
  
  shell_exec('C:\\ffmpeg\\bin\\ffmpeg.exe -i C:\\ffmpeg\\bin\\output1.mp4 -i C:\\ffmpeg\\bin\\1.png -filter_complex "[0:v][1:v] overlay=400:25:enable=\'between(t,5,5.5)\'"  C:\\ffmpeg\\bin\\output2.mp4');

  I used the sleep function (PHP), but it did not work.
  Please, as I have not much experience with ffmpeg and php, you can help me.

  Thank you very much.

• Audio tracks while merging multiple videos using FFMPEG in Android ?

  23 avril 2016, par Leonti

  I have problem in video processing in Android.

  To merging multiple videos, I’m now using ffmpeg c++ library and JavaCV.

  Here is my code :

  protected Void doInBackground(String... params) {
  
      String firstVideo = params[0];
  
      String secondVideo = params[1];
  
      String outPutVideo = params[2];
  
  
  
      try {
  
          FrameGrabber grabber1 = new FFmpegFrameGrabber(firstVideo);
  
          grabber1.start();
  
          FrameGrabber grabber2 = new FFmpegFrameGrabber(secondVideo);
  
          grabber2.start();
  
          FrameRecorder recorder2 = new FFmpegFrameRecorder(outPutVideo, grabber2.getImageWidth(),
  
                  grabber2.getImageHeight(), grabber1.getAudioChannels());
  
  
  
          recorder2.setVideoCodec(grabber2.getVideoCodec());
  
          recorder2.setFrameRate(grabber2.getFrameRate());
  
          recorder2.setSampleFormat(grabber2.getSampleFormat());
  
          recorder2.setSampleRate(grabber2.getSampleRate());
  
          recorder2.setAudioChannels(2);
  
          recorder2.start();
  
          Frame frame;
  
          int j = 0;
  
  
  
          while ((frame = grabber1.grabFrame()) != null) {
  
              j++;
  
              recorder2.record(frame);
  
          }
  
          while ((frame = grabber2.grabFrame()) != null) {
  
              recorder2.record(frame);
  
          }
  
          recorder2.stop();
  
          grabber2.stop();
  
          grabber1.stop();
  
      } catch (Exception e) {
  
          e.printStackTrace();
  
          success = false;
  
      }
  
      return null;
  
  } 

  First video has no sound, and second video has audio tack.

  Audio of second video starts from start of result video.

  I tried and had search many hours, but cannot find solution. Please give me advise if you have experience !!!

• FFMPEG stream video to Youtube Live

  13 juin 2022, par BlessedHIT

  I have a mov file and I'm using ffmpeg to stream it to youtube live using the following command,

  


  ffmpeg -re -i "episode.mov" -pix_fmt yuvj420p -x264-params keyint=48:min-keyint=48:scenecut=-1 -b:v 4500k -b:a 128k -ar 44100 -acodec aac -vcodec libx264 -preset medium -crf 28 -threads 4 -f flv "rtmp://a.rtmp.youtube.com/live2/YOUTUBE.LIVESTREAM.KEY"


  


  But im getting the following message on youtube,

  


  YouTube is not receiving enough video to maintain smooth streaming. As such, viewers will experience buffering


  


  My ffmpeg output showed my bitrate being between 800 - 1000 mbps, way lower than what i have specified in my ffmpeg command.

  


  I am using a not so powerful virtual machine, and so i thought this might be why i am not getting the desired bitrate.

  


  To overcome my hardware limitations, I then decided to encode the file for streaming using this command :

  


  ffmpeg -i episode.mov -c:v libx264 -preset medium -b:v 4500k -maxrate 4500k -bufsize 6000k -vf "scale=1280:-1,format=yuv420p" -g 50 -c:a aac -b:a 128k -ac 2 -ar 44100 episode.flv


  


  Then I stream copy the file using :

  


  ffmpeg -re -i episode.flv -c copy -f flv "rtmp://a.rtmp.youtube.com/live2/YOUTUBE.LIVESTREAM.KEY"


  


  And that seems to give me a stream that youtube is happy with.

  


  My question is, is there a way I can rewrite my ffmpeg command to livestream with the desired bitrate without needing to first encode my mov to another file or is adding more memory the only way forward here ?