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• FFmpeg : Adding multiple overlays to the video with the fade in/out effect. Command works but the images ( overlays ) doesn't show in the video

  12 décembre 2019, par ArmKh

  I’m trying to add multiple overlays to the video and fade in/out them separately. So, the command works without any issue but in the video, I can’t see the overlay images

  Here is the command with which I’m trying to do it

  ffmpeg -y -i video.mp4 -loop 1 -i text1.png -loop 1 -i text2.png -loop 1 -i text3.png -loop 1 -i text4.png -loop 1 -i text5.png -filter_complex "
  
  [1]fade=st=0:d=4:alpha=1,fade=out:st=2:d=1:alpha=1,trim=0:3,setpts=PTS+5/TB[ovr1];
  
  [2]fade=st=0:d=4:alpha=1,fade=out:st=2:d=1:alpha=1,trim=0:3,setpts=PTS+10/TB[ovr2];
  
  [3]fade=st=0:d=4:alpha=1,fade=out:st=2:d=1:alpha=1,trim=0:3,setpts=PTS+15/TB[ovr3];
  
  [4]fade=st=0:d=4:alpha=1,fade=out:st=2:d=1:alpha=1,trim=0:3,setpts=PTS+20/TB[ovr4];
  
  [5]fade=st=0:d=4:alpha=1,fade=out:st=2:d=1:alpha=1,trim=0:3,setpts=PTS+25/TB[ovr5];
  
  [0:v][ovr1]overlay=0:0:enable='between(t,0,5)'[base1];
  
  [base1][ovr2]overlay=0:(main_h-overlay_h)/2:enable='between(t,5,10)'[base2];
  
  [base2][ovr3]overlay=0:(main_h-overlay_h)/2:enable='between(t,10,15)'[base3];
  
  [base3][ovr4]overlay=0:(main_h-overlay_h)/2:enable='between(t,15,20)'[base4];
  
  [base4][ovr5]overlay=0:(main_h-overlay_h)/2:enable='between(t,20,25)'[out]" -map "[out]" -c:v libx264 -c:a copy -flags +global_header -shortest with_overlays.mp4

  Can you please help me to find what am I doing wrong ?

• Not able to show RTSP stream with Angular

  15 mai 2020, par Q.Rey

  i'm working on a web application with angular where i need to show an rtsp stream inside my window.
I'm using JSMpeg player related to this topic : Not able to Show live camera RTSP streaming with Angular.

  



  For my websocket i used the node websocket library and i runned it like this in my cmd : node websocket-relay.js supersecret 8081 8082

  



  It detect each connection i make on it.

  



  Then for the conversion part i used FFMPEG where I convert a h264 format to mpegts (mpegvideo1 gave me an error)
I run it like this :

  



  ffmpeg -i "rtsp://myurl/media.smp" -vcodec h264 -f mpegts -max_muxing_queue_size 9999 -b 800k -r 30 http://localhost:8081/supersecret/640/480/

  



  For the angular part I have this :

  



  @ViewChild('streaming', {static: true}) streamingcanvas: ElementRef; 

constructor( ... ) { }

ngOnInit() {
    ....
    let player = new JSMpeg.Player('ws://localhost:8081/supersecret', {
        canvas: this.streamingcanvas, autoplay: true, audio: false, loop: true
      })
}



  



  Result in my window : 


  



  What did i missed to make it works and get a real video stream ?

  



  Thanks for help

  



  EDIT : My first ffmpeg command was wrong, only the audio was sent, now i got this :

  



  ffmpeg -i "rtsp://myurl/media.smp" -vcodec h264 -f mpegts -codec:v mpeg1video -s 640x360 -b: 700k -r 25 -bf 0 -codec:a mp2 -ar 44100 -ac 1 -b:a 64k -max_muxing_queue_size 9999 http://localhost:8081/supersecret/640/360/


  



  It still doesnt work but the canvas is not black anymore

  


• avcodec/h264_ps : Show VUI and SPS overread messages just once per frame thread

  16 janvier 2020, par Michael Niedermayer

  avcodec/h264_ps : Show VUI and SPS overread messages just once per frame thread
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/h264_ps.c
  • [DH] libavcodec/h264_ps.h