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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 ?

  


• How to the stream should be automatically restart after 10 seconds if the stream cut

  2 mars 2023, par Mr_Milky

  I will restart using this script . But sometime for some reason the stream goes cut....

  


  How to the stream should be automatically restart after 10 seconds if the stream cut.

  


  #!/bin/bash
while true;do
grep -c "Non-monotonous DTS in output stream" file.txt >nonmonotonus.txt
grep -c "Timestamps are unset in a packet for stream" file.txt >timestamp.txt
grep -c "PES packet size mismatch" file.txt >pespacket.txt
grep -c "Error while decoding stream" file.txt >errordecoding.txt
grep -c "Circular buffer overrun" file.txt >circularbuffer.txt
grep -c "Header missing" file.txt >header.txt
grep -c "Conversion failed" file.txt >conversion.txt

file=nonmonotonus.txt
file1=timestamp.txt
file2=pespacket.txt
file3=errordecoding.txt
file4=circularbuffer.txt
file5=header.txt
file6=conversion.txt

if (($(<"$file")>=3000)) || (($(<"$file1")>=500)) || (($(<"$file2")>=100)) || (($(<"$file3")>=1000)) || (($(<"$file4")>=500)) || (($(<"$file5")>=6)) || (($(<"$file6")>=1)); then
stream1 restart > restart.txt
sleep 1
fi
done
__________________________________________________________________________

FFmpeg -re -threads 3 -c:s webvtt -i "$INPUT_URL?source=null&overrun_nonfatal=1&fifo_size=1000000" \
  -c:v copy \
  -map 0:0 -map 0:1  \
  -c:a aac -b:a 128k -ar 48000 \
  -threads 4 -f hls -hls_time 2 -hls_wrap 15 \
  "manifest.m3u8" \
null > /dev/null 2>&1 2>file.txt & echo $! > $STREAM_PID_PATH



  


  How to automatically restart the stream.. after cut the .ts file

  


  Thankyou ...

  


• ffmpeg with delayed inputs put an extra audio output at 0 seconds

  19 mars 2023, par Ralph

  Can someone explain why the input files are played 4 times in total, at 0, 1, 2, 3 seconds.

  


  

  1. The ffmpeg processes three input files (mp3).

  


  2. The complex filter delays the inputs by 1, 2, 3 seconds input-wise.

  


  3. amix mixes the delayed outputs together.

  


  4. And finally, a coded transforms it into an output mp3.

  


  


  ffmpeg -i in0.mp3 -i in1.mp3 -i in2.mp3 -filter_complex "[0]adelay=1000[delayed1];[1]adelay=2000[delayed2];[2]adelay=3000[delayed3];[delayed1][delayed2][delayed3]amix=inputs=3:duration=longest" -codec:a libmp3lame -q:a 4 output.mp3


  


  short version : 2 delayed beeps, an finally there come 3 beeps out (@ 0, 1, 2 seconds) :

  


  ffmpeg -i beep.mp3 -filter_complex "[0]adelay=1000[delayed1];[0]adelay=2000[delayed2];[delayed1][delayed2]amix=inputs=2:duration=longest" -codec:a libmp3lame -q:a 4 output.mp3


  


  ffmpeg version N-110011-gf456c192d9-tessus on a Mac M1.

  


  I added also a silent input file from 0 to 1 seconds without any alteration of the outcome.
I added a silent stream as input as well without improvement. E.g. :

  


  ... -filter_complex "aevalsrc=0:d=4[silence];...


  


  Another test with another ffmpeg version 5.1 Copyright (c) 2000-2022 the FFmpeg developers built with Apple clang version 13.1.6 (clang-1316.0.21.2.5) :
ffmpeg -i beep.mp3 -filter_complex "[0]adelay=1000[delayed1];aevalsrc=0:d=5[silence];[silence][delayed1]amix=inputs=2:duration=longest" -codec:a libmp3lame -q:a 4 output.mp3
There are again 2 beeps, at 0 and 1 second - going mad here !

  


  (concat solves the issue. But I want to have a flexible solution with possibly overlapping audio streams.) Thanks for giving a hint !