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• FFMPEG - Overlay multipe videos over video at specified interval of time

  17 août 2020, par ND1010_

  I want to overlay multiple videos over a single video at specified interval of time.

  



  have tried with different solution but it will not work as i aspect

  



  i am use below command to overlay video over video

  



  String[] cmdWorking3 = new String[]{"-i",yourRealPath,"-i",gifVideoFile1,"-i",gifVideoFile2,"-i",gifVideoFile3,
                "-filter_complex",
                "[0][1]overlay=100:100:enable='between(t,0,2)'[v1];" +
                        "[v1][2]overlay=130:130:enable='between(t,0,2)'[v2];" +
                        "[v2][3]overlay=150:150:enable='between(t,5,6)'[v3];",
                "-map","[v3]","-map" ,"0:a",
                "-preset", "ultrafast", filePath};


  



  by using above command first two video completely works fine but last one will not enable

  



  Edit :

  



  //Working perfect

  



   String[] cmdWorking11 = new String[]
                {"-i",
                        yourRealPath,
                        "-i",
                        gifVideoFile1,
                        "-i",
                        gifVideoFile2,
                        "-i",
                        gifVideoFile3,
                        "-i",
                        gifVideoFile4,

                        "-filter_complex",

                        "[1]setpts=PTS+3/TB[1d];" +
                        "[2]setpts=PTS+7/TB[2d];" +
                        "[3]setpts=PTS+10/TB[3d];" +

                        "[0][1]overlay=100:100:enable='between(t,0,2)'[v1];" +
                        "[v1][1d]overlay=130:130:enable='between(t,3,6)'[v2];" +
                        "[v2][2d]overlay=130:130:enable='between(t,7,9)'[v3];" +
                        "[v3][3d]overlay=150:150:enable='between(t,10,13)'[v4];" +

                        "[1]asetpts=PTS+3/TB[1ad];" +
                        "[2]asetpts=PTS+7/TB[2ad];" +
                        "[3]asetpts=PTS+10/TB[3ad];" +
                        "[0:a][1ad][2ad][3ad]amix=4[a]",

                        "-map", "[v4]", "-map", "[a]", "-ac", "5",

                        "-preset",
                        "ultrafast",

                        filePath};


  



  Above command is perfectly works fine but audio from the overlapped video is gone,can you please help me to solve this issue.

  



  main Video time Duration is about 00:15 second and all overlay videos are about 3 second.

  



  it would be great to helping out to solve this issue,Thanks in advance.

  


• Streaming RTP with ffmpeg

  30 mars 2016, par Dmitry

  Im trying to stream audio via rtp over udp with ffmpeg (filename = "rtp://11.89.9.211:30000").
  Here is my code for server(which one is streaming, and I have deleted all checks from code for easy reading) :

      AVStream *stream = NULL;
  
      AVCodec *output_codec = NULL;
  
      int error;
  
      out_ifcx[i] = avformat_alloc_context();
  
      out_ifcx[i]->oformat = av_guess_format("rtp", NULL, NULL);
  
      avformat_alloc_output_context2(&out_ifcx[i], nullptr, "rtp", filename);
  
      avio_open(&(out_ifcx[i])->pb, filename, AVIO_FLAG_WRITE));
  
      av_strlcpy((out_ifcx[i])->filename, filename, sizeof((out_ifcx[i])->filename));
  
      output_codec = avcodec_find_encoder((in_ifcx[i])->streams[0]->codec->codec_id);
  
      stream = avformat_new_stream(out_ifcx[i], output_codec)
  
      out_iccx[i] = stream->codec;
  
      (out_iccx[i])->channels = OUTPUT_CHANNELS;
  
      (out_iccx[i])->channel_layout = av_get_default_channel_layout(OUTPUT_CHANNELS);
  
      (out_iccx[i])->sample_rate = in_iccx[i]->sample_rate;
  
      (out_iccx[i])->sample_fmt = AV_SAMPLE_FMT_S16;
  
      (out_iccx[i])->bit_rate = iccx[i]->bit_rate;
  
      if ((out_ifcx[i])->oformat->flags & AVFMT_GLOBALHEADER)
  
          (out_iccx[i])->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
      avcodec_open2(out_iccx[i], output_codec, NULL)

  PS : out_iccx[i], in_iccx[i] - vector; out_ifcx[i] in_ifcx[i] - vector
  Problem with it is : when i`m trying to reach another computer in the same network this code gives an error

  udp_resolve_host: nodename nor servname provided, or not known

  Also, when i`m streaming to the same computer but on other port (I use not local host IP(127.0.0.1), but of this computer : 11.88.8.20), everything works perfect.
  I dont know why and how to fix it. Can anyone help, please ?

• How to get playing audio file data in ffmpeg stream ?

  27 juin 2022, par Viktor Kushnir

  Dears experts of the wonderful ffmpeg utility ! Tell me please who knows this :
I want to make a 24/7 stream on YouTube of music from looped video and audio tracks.
I do it like this :

  


  ffmpeg -loglevel info -stream_loop -1 -y -re \
    -i video.mp4 \
    -f concat -safe 0 -i playlist.txt \
    -c:v libx264 -preset veryfast -b:v 3000k -maxrate 3000k -bufsize 6000k \
    -framerate 25 -video_size 1280x720 -vf "format=yuv420p" -g 50 -shortest -strict experimental \
    -c:a aac -b:a 128k -ar 44100 \
    -f flv rtmp://localhost/live/my-stream


  


  i.e. video.mp4 is spinning in a loop and from the playlist.txt file I play mp3 in turn.
With this everything is ok, everything works. But I also want to show the title of the playing track.
As for example on some YouTube radios :



  


  With cover is perfect !

  


  Any ideas how this can be implemented ?

  


  I know that it is possible to display text through drawtext. You can output text from a file, which you can separately update yourself. But how to get the data of the currently playing file ? ffmpeg does not give such information, only stream parameters : fps, framerate... Or is it still possible to get it ?

  


  Or are there better and easier ways ?

  


  Thanks in advance for your help !