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• Sync Multiple Video sources based on audio

  14 octobre 2016, par linuxer

  I have 6 videos from 6 separate cameras that I need to sync up. They don’t all start at the same time, and so I am thinking the best route would be based on audio. Is there a way to do this with ffmpeg, or is there a library for C# that I can use ?

  The result needs to be that the 6 videos are synced based on audio, and then trimmed so they are all the same length and audio matches up.

  I am really hoping there are some tools to simplify this, but in my searching I haven’t seen anything.

• My (FFMPEG issue ) RTMP server(freebsd) wont let me hear video when I play a huge file over the server itself :/

  19 avril 2021, par Engi Gang

  Hey my name is Alisha from Norway im trying to get my RTMP server working the thing is that it works just fine but I just cant stream over it with ffmpeg I can stream to it on OBS and it works fine, but I am trying to a website where people could watch old public domain movies from the 1950 some of the films are actually pretty big lol.... anyways I detailed bellow more

  


  rm -rf /mnt/hls/loool && ffmpeg -re -i "$file" -c:v libx264 -c:a aac -b:v 300k -b:a 95k -f flv -flvflags no_duration_filesize rtmp ://lambright.xyz:1935/live/loool

  


  any work around I literally cant play the audio :( I can only hear (my source file is an MKV and 3gb )

  


  Note I had a smaller mp4 file and it did played the audio, the video isnt even playable in chrome but on VLC it is, but only a small file worked fine... its fine when I stream from my pc, but whats the point I am trying to set up my vintage 1950 serverbox :') trying to build a nice website where users could watch neat and decent old movies that are public domain if you wonder :/

  


  Another note when I am trying to play it on my iphone safari browser it does actually play parts but audio is super corrupted like you hear the audio sometimes :((

  


  rtmp {
    server {
        listen 1935; # Listen on standard RTMP port
        chunk_size 4000;

        application live {
            allow play all;
            live on;
            record off;
            hls on;
            hls_nested on;
            hls_path /mnt/hls/;
            hls_fragment 2s;
        }
        
    }
}


  


• lavu/opt : fix range check logic in set_format()

  16 décembre 2013, par Stefano Sabatini

  lavu/opt : fix range check logic in set_format()
  In particular, allow to reject undefined values. Previously the code
  
  was only accepting values in the range -1 .. NB_FORMATS-1.
  

  • [DH] libavutil/opt.c