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• Not best results for [screen capture] streaming with ffmpeg js

  13 mai 2021, par Nikola Lukic

  Platform : Windows 10
Ffmpeg version 4.4-full_build-www.gyan.dev

  


  This app works fine on macos.

  


  node websocket-relay.js supersecret 8081 8082

http-server --host=https://localhost --port 8080

ffmpeg -f  gdigrab  -i desktop -framerate 30 -video_size 640x480 -f mpegts -codec:v mpeg2video -s 640x480 -rtbufsize 100M -b:v 1000k -bf 0 http://localhost:8081/supersecret


  


  Logs :

  


  frame= 5515 fps= 20 q=31.0 size=    8302kB time=00:04:36.20 
frame= 5526 fps= 20 q=31.0 size=    8317kB time=00:04:36.77 
frame= 5537 fps= 20 q=31.0 size=    8331kB time=00:04:37.31 
frame= 5548 fps= 20 q=24.8 size=    8346kB time=00:04:37.87 
frame= 5558 fps= 20 q=31.0 size=    8352kB time=00:04:38.37 
frame= 5569 fps= 20 q=31.0 size=    8368kB time=00:04:38.91 
frame= 5579 fps= 20 q=31.0 size=    8382kB time=00:04:39.41 
frame= 5590 fps= 20 q=31.0 size=    8397kB time=00:04:39.97 
frame= 5600 fps= 20 q=31.0 size=    8411kB time=00:04:40.48 


  


  Finally in my browser i got something like that :

  


  

  


  Any suggestion !
I am new for ffmpeg topic...

  


• How to convert cctv footage to h265 for streaming and recording in nginx-rtmp module ?

  6 avril 2021, par Joram

  I am using the nginx-rtmp-module here to pull an rtsp stream from a camera on local network and convert it to rtmp. This rtmp stream is then converted to hls and made available for livestreaming. It is also being recorded in 5 min segments. (these things can all be seen in the nginx.conf below).

  


  I want to change the video codec to h265 to save storage space, since each 5 min video is ~230mb, and using opencv and python, I was able to get <100mb per 5 min video using h265, so I know there is a lot of space for storage saving.

  


  How can I change the codec of the stream to h265 ?

  


  I have tried installing libx265-dev and setting -vcodec libx265, however this tells me flv is an invalid container and I'm getting nowhere with finding a valid container for streaming + recording.

  


  My nginx.conf :

  


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

        application relay {
            
            live on;

            hls on;
            hls_path /tmp/hls;
            hls_fragment 15s;


            exec_static /usr/bin/ffmpeg -i rtsp://test:test@192.168.100.10:8554/fhd -vcodec copy -f flv rtmp://localhost:1935/relay/fhd; 

            # record block  
            record video;
            record_path /tmp/hls;
            record_unique on;
            record_interval 5m;
        }
    }
}


  


• avformat/wavenc : Fix leak and segfault on reallocation error

  22 février 2021, par Andreas Rheinhardt

  avformat/wavenc : Fix leak and segfault on reallocation error
  Up until now, the wav muxer used a reallocation of the form ptr =
  
  av_realloc(ptr, size) ; that leaks upon error. Furthermore, if a
  
  failed reallocation happened when writing the trailer, a segfault
  
  would occur due to avio_write(NULL, size) because the muxer only
  
  prints an error message upon allocation error, but does not return
  
  the error.
  Moreover setting the pointer to the buffer to NULL on error seems to
  
  be done on purpose in order to record that an error has occured so that
  
  outputting the peak values is no longer attempted. This behaviour has
  
  been retained by simply disabling whether peak data should be written
  
  if an error occurs.
  Finally, the reallocation is now done once per peak block and not once
  
  per peak block per channel ; it is also done with av_fast_realloc and not
  
  with a linear size increase.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/wavenc.c