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• FFMPEG Screen Flashing Green

  18 novembre 2022, par Devin Dixon

  I have this problem where my ffmpeg videos are flicking green. Example of the video is here :
https://www.glitch.fun/streams/31fea7e0-7523-4365-9780-31deee9e472c/watchrecording/efb841c0-4b87-4482-b165-990880a66f63

  


  My ffmpeg command is this :

  


  /usr/bin/ffmpeg -vaapi_device /dev/dri/renderD128 -y -v info -f x11grab -draw_mouse 0 -r 60 -s 1920x1080 -thread_queue_size 14000 -i :0.0+0,0 -f alsa -thread_queue_size 14000 -i plug:bsnoop -acodec aac -strict -2 -ar 44100 -b:a 128k -af aresample=async=1 -c:v h264_vaapi -vf format=nv12|vaapi,hwupload -preset medium -maxrate 14000k -bufsize 14000k -pix_fmt yuv420p -r 60 -crf 25 -g 120 -tune zerolatency -f flv rtmp://ingest.bingewave.com/live/[output_to_livestream] -pix_fmt yuv420p -r 60 -b:v 15000k -maxrate 15000k -bufsize 15000k -c:v h264_vaapi -vf format=nv12|vaapi,hwupload -preset medium -keyint_min 24 -level 3.0 -g 120 -tune zerolatency -f flv rtmp://127.0.0.1:1935/live/[output_to_recording]


  


  The reason why my fps and bitrate is so high and preset is so medium is because Glitch is an open source esports platform, and those kinds of settings are required for streaming of game graphics
The command has two outputs :

  


  

  • rtmp ://[output_to_livestream] goes to a livestream where users watch live

  


  • rtmp ://127.0.0.1:1935/live/[output to recording] goes a goes to a file

  


  


  And the output to the recording is captured by nginx and saved to a file as such :

  


  rtmp {
    server {
        listen 1935;
        chunk_size 4096;

        application live {
            live on;
            #Set this to "record off" if you don't want to save a copy of your broadcasts
            record all;
            # The directory in which the recordings will be stored.
            record_path /var/www/html/recordings;
            record_unique on;
            record_suffix -%d-%b-%y-%T.flv;
            on_record_done http://127.0.0.1:3000/recorded;
            # Turn on HLS
            exec /usr/bin/ffmpeg -vaapi_device /dev/dri/renderD128 -i rtmp://127.0.0.1:1935/live/$name -c:v copy -c:a copy -f flv rtmp://127.0.0.1/show/$name;
        }

        application show {
            live on;
            # Turn on HLS
            hls on;
            hls_path /mnt/hls/;
            hls_fragment 3;
            hls_playlist_length 60;
            # disable consuming the stream from nginx as rtmp
            deny play all;
        }
    }
}


  


  So the part that goes to the live is fine, no green flickering at all. But the part that goes to the recording is one that goes the above issue :

  


  -pix_fmt yuv420p -r 60 -b:v 15000k -maxrate 15000k -bufsize 15000k -c:v h264_vaapi -vf format=nv12|vaapi,hwupload -preset medium -keyint_min 24 -level 3.0 -g 120 -tune zerolatency -f flv rtmp://127.0.0.1:1935/live/[output_to_recording]


  


  I
s there something I need to be changing here ?

  


• Voxware MetaSound decoder

  5 août 2013, par Kostya Shishkov

  Voxware MetaSound decoder
  

  • [DH] Changelog
  • [DH] configure
  • [DH] doc/general.texi
  • [DH] libavcodec/Makefile
  • [DH] libavcodec/allcodecs.c
  • [DH] libavcodec/metasound.c
  • [DH] libavcodec/metasound_data.c
  • [DH] libavcodec/metasound_data.h
  • [DH] libavcodec/twinvq.c
  • [DH] libavcodec/version.h

• Configure ffmpeg for wowza and wp8

  11 octobre 2013, par Anton Shakalo

  I have mp4 file from my windows phone.

  There is info :

  General
  
  Format                                   : MPEG-4
  
  Format profile                           : Base Media / Version 2
  
  Codec ID                                 : mp42
  
  
  
  Video
  
  Format                                    : AVC
  
  Codec ID                                 : avc1
  
  Codec ID/Info                           : Advanced Video Coding
  
  
  
  Audio
  
  Format                                    : AAC
  
  Format profile                           : LC
  
  Codec ID                                 : 40
  
  Bit rate                                   : 96.0 Kbps
  
  Sampling rate                           : 44.1 KHz

  When I stream it to wowza with next ffmpeg command ( I got it from documentation)

  ffmpeg -re -i "C:\sample2.mp4"  -vcodec libx264  -vb 150000 -g 60 -vprofile main -level 2.1 -acodec aac -ab 64000 -ar 48000 -ac 2 -vbsf h264_mp4toannexb  -f mpegts udp://127.0.0.1:10001?pkt_size=1316

  In client app I see corrupted video : http://i.imgur.com/fKEMlsB.png

  With sample file provided by wowza streamed video looks fine.

  There is info about sample file from wowza :

  General
  
  Format                                   : MPEG-4
  
  Format profile                           : QuickTime
  
  Codec ID                                 : qt  
  
  
  
  Video
  
  Format                                   : AVC
  
  Format profile                           : Baseline@L3.0
  
  Codec ID                                 : avc1
  
  
  
  Audio
  
  Format                                   : AAC
  
  Format profile                           : LC
  
  Codec ID                                 : 40

  Can you help me with ffmpeg configuring ?
  I read documentation, but understand nothing.