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• Streaming fails when I activate hls

  4 avril 2024, par yieniggu

  I'm currently testing a local server with nginx and the rtmp module in order to receive video streams. It's working just fine, but I want to add hls/dash in order to reproduce the streams on html. However, when I add this functionality to the config file the sources start complaining about the server and stop streaming.

  


  For example, if am streaming through OBS I got a message that is attempting to reconnect every 2 seconds with no success.

  


  If I use ffmpeg as :

  


  ffmpeg -re -i 'pescado.mp4' -c:v libx264 -preset slower -tune zerolatency -c:a aac -f flv rtmp://localhost/live/pescado


  


  The error I have is :

  


  av_interleaved_write_frame(): Broken pipeB time=00:00:00.00 bitrate=16592.0kbits/s speed=0.00225x    
[flv @ 0x5d3f03942cc0] Failed to update header with correct duration.
[flv @ 0x5d3f03942cc0] Failed to update header with correct filesize.
Error writing trailer of rtmp://localhost/live/pescado: Broken pipe


  


  This is my nginx config file :

  


  ser www-data;
worker_processes auto;
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;
        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 TLSv1.3; # 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
        ##

        gzip on;

        # gzip_vary on;
        # gzip_proxied any;
        # gzip_comp_level 6;
        # gzip_buffers 16 8k;
        # gzip_http_version 1.1;
        # gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

        ##
        # Virtual Host Configs
        ##

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
}


#mail {
#       # See sample authentication script at:
#       # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
#
#       # auth_http localhost/auth.php;
#       # pop3_capabilities "TOP" "USER";
#       # imap_capabilities "IMAP4rev1" "UIDPLUS";
#
#       server {
#               listen     localhost:110;
#               protocol   pop3;
#               proxy      on;
#       }
#
#       server {
#               listen     localhost:143;
#               protocol   imap;
#               proxy      on;
#       }
#}


rtmp {
        server {
                listen 1935;
                chunk_size 4096;

                allow publish 127.0.0.1;
                allow publish 10.33.6.235;
                deny publish all;

                application live {
                        live on;
                        record off;

                        hls on;
                        hls_path /var/www/html/stream/hls;
                        hls_fragment 3;
                        hls_playlist_length 60;
                        hls_cleanup off;

                        dash on;
                        dash_path /var/www/html/stream/dash;
                        dash_cleanup off;
                }
        }
}


  


  I've been following the tutorials from How To Set Up a Video Streaming Server using Nginx-RTMP on Ubuntu 22.04

  


• my ffmpeg livestream keeps crashing : How do I troubleshoot ?

  12 février 2024, par n79qk272x57w46w9

  I can't find the reason on why it is crashing, all I have is a list of mp3 files which are encoded to AAC on the fly.

  


  stream.sh

  


  #!/bin/bash

ffmpeg \
-stream_loop -1 -re \
-i video.mp4 \
-safe 0 \
-f concat \
-i playlist.txt \
-c:v libx264 -preset slower -b:v 3500k -maxrate 3500k -bufsize 7000k -pix_fmt yuv420p -g 50 -c:a aac -b:a 320k -ac 2 -ar 44100 -f flv \
rtmps://---------------/s/----key----:----key----


  


  This is what journalctl collected :

  


  Feb 12 18:07:57 main bash[3236855]: [47.9K blob data]
Feb 12 18:11:38 main bash[3236855]: [48.0K blob data]
Feb 12 18:15:19 main bash[3236855]: [48.0K blob data]
Feb 12 18:18:59 main bash[3236855]: [48.0K blob data]
Feb 12 18:22:41 main bash[3236855]: [48.0K blob data]
Feb 12 18:26:21 main bash[3236855]: [48.0K blob data]
Feb 12 18:30:02 main bash[3236855]: [48.0K blob data]
Feb 12 18:33:42 main bash[3236855]: [48.0K blob data]
Feb 12 18:37:23 main bash[3236855]: [48.0K blob data]
Feb 12 18:41:03 main bash[3236855]: [48.0K blob data]
Feb 12 18:44:44 main bash[3236855]: [48.0K blob data]
Feb 12 18:48:25 main bash[3236855]: [48.0K blob data]
Feb 12 18:50:07 main bash[3236855]: [22.3K blob data]
Feb 12 18:50:07 main bash[3236855]: av_interleaved_write_frame(): Input/output error
Feb 12 18:50:09 main bash[3236855]:     Last message repeated 1 times
Feb 12 18:50:09 main bash[3236855]: [flv @ 0x5642d6c08c00] Failed to update header with correct duration.
Feb 12 18:50:09 main bash[3236855]: [flv @ 0x5642d6c08c00] Failed to update header with correct filesize.
Feb 12 18:50:09 main bash[3236855]: Error writing trailer of rtmps://------------/s/key:key: Input/output error
Feb 12 18:50:09 main bash[3236855]: frame=1215777 fps= 30 q=14.0 Lsize=18376958kB time=11:16:04.14 bitrate=3711.3kbits/s dup=0 drop=1 speed=   1x
Feb 12 18:50:09 main bash[3236855]: video:16828839kB audio:1495386kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.287779%
Feb 12 18:50:09 main bash[3236855]: [tls @ 0x5642d6bbcf40] The specified session has been invalidated for some reason.
Feb 12 18:50:09 main bash[3236855]:     Last message repeated 1 times
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] frame I:24338 Avg QP: 3.06  size: 52975
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] frame P:393923 Avg QP: 6.45  size: 24751
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] frame B:797516 Avg QP: 9.68  size:  7767
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] consecutive B-frames:  6.8% 12.2% 15.4% 65.7%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] mb I  I16..4: 47.0%  5.2% 47.9%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] mb P  I16..4:  0.8%  0.5%  4.3%  P16..4: 18.2% 13.6% 11.8%  4.1%  2.3%    skip:44.2%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] mb B  I16..4:  0.2%  0.1%  0.7%  B16..8: 21.7% 14.2%  6.4%  direct: 7.9%  skip:48.8%  L0:35.3% L1:35.8% BI:28.9%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] 8x8 transform intra:6.6% inter:16.5%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] direct mvs  spatial:99.7% temporal:0.3%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] coded y,uvDC,uvAC intra: 68.9% 62.6% 52.6% inter: 36.3% 21.5% 11.4%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] i16 v,h,dc,p: 70% 14% 13%  3%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 21% 19%  5%  5%  5%  6%  8% 10%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 23% 18%  5%  6%  6%  6%  6%  8%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] i8c dc,h,v,p: 59% 24% 12%  5%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] Weighted P-Frames: Y:2.0% UV:0.5%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] ref P L0: 69.7% 13.7%  6.8%  3.4%  2.0%  1.8%  1.3%  1.2%  0.2%  0.0%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] ref B L0: 88.7%  7.1%  2.0%  0.9%  0.7%  0.4%  0.3%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] ref B L1: 97.2%  2.8%
Feb 12 18:50:09 main bash[3236855]: [libx264 @ 0x5642d6be6300] kb/s:3398.63
Feb 12 18:50:09 main bash[3236855]: [aac @ 0x5642d6bbdd40] Qavg: 14231.606
Feb 12 18:50:09 main bash[3236855]: Conversion failed!
Feb 12 18:50:09 main systemd[1]: stream.service: Main process exited, code=exited, status=1/FAILURE
Feb 12 18:50:09 main systemd[1]: stream.service: Failed with result 'exit-code'.


  


  From this log it is hard to tell at which point and which file it started to have problems converting.

  


• Decode h264 video bytes into JPEG frames in memory with ffmpeg

  5 février 2024, par John Karkas

  I'm using python and ffmpeg (4.4.2) to generate a h264 video stream from images produced continuously from a process. I am aiming to send this stream over websocket connection and decode it to individual image frames at the receiving end, and emulate a stream by continuously pushing frames to an <img style='max-width: 300px; max-height: 300px' /> tag in my HTML.

  


  However, I cannot read images at the receiving end, after trying combinations of rawvideo input format, image2pipe format, re-encoding the incoming stream with mjpeg and png, etc. So I would be happy to know what the standard way of doing something like this would be.

  


  At the source, I'm piping frames from a while loop into ffmpeg to assemble a h264 encoded video. My command is :

  


          command = [
            'ffmpeg',
            '-f', 'rawvideo',
            '-pix_fmt', 'rgb24',
            '-s', f'{shape[1]}x{shape[0]}',
            '-re',
            '-i', 'pipe:',
            '-vcodec', 'h264',
            '-f', 'rawvideo',
            # '-vsync', 'vfr',
            '-hide_banner',
            '-loglevel', 'error',
            'pipe:'
        ]


  


  At the receiving end of the websocket connection, I can store the images in storage by including :

  


          command = [
            'ffmpeg',
            '-i', '-',  # Read from stdin
            '-c:v', 'mjpeg',
            '-f', 'image2',
            '-hide_banner',
            '-loglevel', 'error',
            f'encoded/img_%d_encoded.jpg'
        ]


  


  in my ffmpeg command.

  


  But, I want to instead extract each individual frame coming in the pipe and load in my application, without saving them in storage. So basically, I want whatever is happening at by the 'encoded/img_%d_encoded.jpg' line in ffmpeg, but allowing me to access each frame in the stdout subprocess pipe of an ffmpeg pipeline at the receiving end, running in its own thread.

  


  

  • What would be the most appropriate ffmpeg command to fulfil a use case like the above ? And how could it be tuned to be faster or have more quality ?

  


  • Would I be able to read from the stdout buffer with process.stdout.read(2560x1440x3) for each frame ?

  


  


  If you feel strongly about referring me to a more update version of ffmpeg, please do so.

  


  PS : It is understandable this may not be the optimal way to create a stream. Nevertheless, I do not find there should be much complexity in this and the latency should be low. I could instead communicate JPEG images via the websocket and view them in my <img style='max-width: 300px; max-height: 300px' /> tag, but I want to save on bandwidth and relay some computational effort at the receiving end.