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• Swift framework project with internal C module - Undefined symbols for architecture arm64

  29 mars 2020, par Phạm Phi Phúc

  I’m creating Swift framework project using FFmpeg module internally.

  Steps are :

  1. Download source of FFmpeg from official website.
  2. Build it by build script here : https://github.com/kewlbear/FFmpeg-iOS-build-script
  3. Copy built file to project
  4. Create file module.modulemap, it’s content is :

  module FFmpeg [system][extern_c] {
  
  
  
      header "include/libavcodec/avcodec.h"
  
      header "include/libavdevice/avdevice.h"
  
      header "include/libavfilter/avfilter.h"
  
      header "include/libavformat/avformat.h"
  
      header "include/libavutil/avutil.h"
  
      header "include/libswresample/swresample.h"
  
      header "include/libswscale/swscale.h"
  
  
  
      export *
  
  }

  Project tree is :

  

  5. Set Import paths for both project settings and target settings to
     $(SRCROOT)/MediaToolkit/Libraries/FFmpeg/**
  6. My source code is :

  import Foundation
  
  import FFmpeg
  
  
  
  public class MediaToolkit {
  
      public init(){}
  
  
  
      public func hello() {
  
          print("AVFMT_NOFILE: \(AVFMT_NOFILE)")
  
          avformat_network_init()
  
      }
  
  }

  When I build it, I received error

  Undefined symbols for architecture arm64:
  
    "_avformat_network_init", referenced from:
  
        MediaToolkit.MediaToolkit.hello(Swift.String) -> () in MediaToolkit.o
  
  ld: symbol(s) not found for architecture arm64
  
  clang: error: linker command failed with exit code 1 (use -v to see invocation)

  If I remove line avformat_network_init(), it will print AVFMT_NOFILE: 1

• ERROR in ./node_modules/fluent-ffmpeg/index.js Module not found : Error : Can't resolve './lib-cov/fluent-ffmpeg'

  3 octobre 2023, par yasgur99

  When I do yarn add fluent-ffmpeg i get this issue :

  



  WARNING in ./node_modules/electron-debug/index.js 96:45-58
Critical dependency: the request of a dependency is an expression
 @ dll renderer

WARNING in ./node_modules/electron-debug/index.js 97:61-74
Critical dependency: the request of a dependency is an expression
 @ dll renderer

WARNING in ./node_modules/fluent-ffmpeg/lib/options/misc.js 27:21-40
Critical dependency: the request of a dependency is an expression
 @ ./node_modules/fluent-ffmpeg/lib/fluent-ffmpeg.js
 @ ./node_modules/fluent-ffmpeg/index.js
 @ dll renderer

ERROR in ./node_modules/fluent-ffmpeg/index.js
Module not found: Error: Can't resolve './lib-cov/fluent-ffmpeg' in '/Users/yasgur99/Documents/desktopapp/node_modules/fluent-ffmpeg'
 @ ./node_modules/fluent-ffmpeg/index.js 1:48-82
 @ dll renderer


  



  They said they fixed it in this GitIssue : here

  



  Anyone have any advice ?

  



  Some notes : Im using babel, I'm building an electron application

  


• Waiting between FFMPEG scripts when creating .hdr/.chk and .mpd files on NGINX server using RTMP module

  17 avril 2020, par Mathew Knight

  Wonder if anyone might be able to suggest a solution to and issue i'm having.

  



  I'm running some FFMPEG scripts inside a RTMP server block on an NGINX server running on Ubuntu 18.04.

  



  Basically i'm ingesting the RTMP stream to the server then using FFMPEG to Demux into separate audio and video header and chunk files, then in separate scripts i'm creating two separate manifests for both the audio and video.

  



  The player i have (a development ambisonic, 360 video player) is having problems reading the stream correctly and i believe this is due to the FFMPEG process for the manifests not waiting 2 seconds before running.

  



  Is there a way to program a wait in between the scripts to facilitate this ?

  



  furthermore, is there a way to make the manifest scripts only run once then quit ?

  



  heres my current NGINX .conf

  



  user root;
#user www-data;
worker_processes 1;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;
events {
    worker_connections 768;
    # multi_accept on;
}
http {
    ##
    # Basic Settings
    ##
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    # server_tokens off;
    # server_names_hash_bucket_size 64;
    # server_name_in_redirect off;
    include /etc/nginx/mime.types;
    default_type application/octet-stream;
    ##
    # SSL Settings
    ##
    #ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
    #ssl_prefer_server_ciphers on;
    ##
    # Logging Settings
    ##
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;
    ##
    # Gzip Settings
    ##
    ##
    # Virtual Host Configs
    ##
    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}
rtmp {
        server {
            listen 1935;
            chunk_size 4096;

            application live {
            live on;
            record off;
            interleave off;
            wait_key on;
            meta on;
            wait_video off;
            idle_streams off;
            sync 300ms;
            session_relay on;
            #allow publish 127.0.0.1;
            #allow publish 192.168.2.0/24;
            allow publish all;
            #deny publish all;
            allow play all;    
        #RX stream to FFMPEG, demux audio and video, write .hdr files, start chunking DASH segments .chk
         exec_push sudo ffmpeg -y -re -i 'rtmp://localhost:1935/live/stream' -map 0:1 -pix_fmt yuv420p -maxrate 750k -bufsize 3000k -c:v libvpx-vp9 -s 1920x1080 -keyint_min 60 -g 60 -speed 6 -tile-columns 4 -frame-parallel 1 -threads 8 -static-thresh 0 -max-intra-rate 300 -deadline realtime -lag-in-frames 0 -error-resilient 1 -b:v 6000k -f webm_chunk -header "/var/www/html/dash/video_360.hdr" -chunk_start_index 1 "/var/www/html/dash/video_360_%d.chk" -map 0:2 -c:a libopus -mapping_family 255 -b:a 1024k -vn -f webm_chunk -audio_chunk_duration 2000 -header "/var/www/html/dash/audio_171.hdr" -chunk_start_index 1 "/var/www/html/dash/audio_171_%d.chk" 2>>/var/log/nginx/ffmpegChunk.log;

        #Create video manifest
        exec_push sudo ffmpeg -probesize 500M -analyzeduration 100M -f webm_dash_manifest -live 1 -i "/var/www/html/dash/video_360.hdr" -map 0 -c copy -f webm_dash_manifest -live 1 -adaptation_sets "id=0,streams=0" -chunk_start_index 1 -chunk_duration_ms 2000 -minimum_update_period 7200 "/var/www/html/dash/video.mpd" 2>>/var/log/nginx/ffmpegManifestVideo.log;
        #Create audio manifest
        exec_push sudo ffmpeg -probesize 500M -analyzeduration 100M -f webm_dash_manifest -live 1 -i "/var/www/html/dash/audio_171.hdr" -map 0 -c libopus -mapping_family 255 -f webm_dash_manifest -live 1 -adaptation_sets "id=1,streams=0" -chunk_start_index 1 -chunk_duration_ms 2000 -minimum_update_period 7200 "/var/www/html/dash/audio_16ch.mpd" 2>>/var/log/nginx/ffmpegManifestAudio.log;

        ##
        # Record the incoming stream
        ##
        # Record audio and video together
        record all;
        record_path /home/mathewknight/Desktop/StreamRecord/Master;
        record_notify on;
        # Record audio seperately
        recorder audio {
            record audio;
            record_path /home/mathewknight/Desktop/StreamRecord/Audio;
            record_suffix -%d-%b-%y-%T.audio.flv;
            record_notify on;
            }
        # Record video seperately
        recorder video{
            record video;
            record_path /home/mathewknight/Desktop/StreamRecord/Video;
            record_suffix -%d-%b-%y-%T.video.flv;
            record_notify on;
            }

            }


        }

}