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• How to eliminate the distortion in live streaming Nodejs + ffmpeg

  16 août 2015, par hackmith

  I tried Live video Streaming with NodeJS and ffmpeg encoder. It works with a lag of around 2sec and with a distortion as well. Lag does not matter as there is always. But I need to eliminate the video distortion as much as possible. So what would be the suitable bit rates and is there a better encoder to do this ? In ffmpeg, it encodes to mpegts so is there a more preferable format than mpegts ? plz help

  my encoding code was

  ffmpeg -s 640x480 -f dshow -i video="HP HD Webcam":audio="Microphone (Realtek High Definition Audio)" -preset ultrafast -qp 0 -f mpegts -v:b 800 -r 100 http://localhost:8082/abc/640/480/

• garbled audio when streaming to youtube using ffmpeg

  27 mai 2022, par skavish

  I am having some weird audio issues streaming to youtube using ffmpeg.

  


  The same stream on facebook and twitch is fine, but on youtube it has some garbling audio issues.

  


  Here is one of those streams : https://www.youtube.com/watch?v=zat4fhwFGUI

  


  Here is ffmpeg command which was used to stream this video. I removed input, output key and inserted newlines for readability.

  


  This command is streaming to youtube (last tee), to hls (first) and to mp4 (second). hls and mp4 do not have this audio issue. Also no issues if we add another tee to stream say to facebook as well.

  


  It happens only with youtube.

  


  I would appreciate any help or ideas on what is going on there. Thank you !

  


  ffmpeg -i XXXXXXXXXX -r 30 -preset ultrafast -tune zerolatency -threads 0 -vsync 1 -map 0:v -c:v libx264 -crf 23 -g 60.0 -sc_threshold 0 -keyint_min 60.0
-pix_fmt yuv420p -map 1:a:0 -c:a:0 aac -b:a:0 128k -ac 2 -ar 44100 -aq 0 -flags +global_header
-f tee
[f=hls:var_stream_map='v:0,a:0':select='v:0,a:0':hls_time=2.0:hls_playlist_type=event:
hls_flags=independent_segments+temp_file:master_pl_publish_rate=1:hls_segment_type=mpegts:hls_segment_filename=/tmp/10311326958150343888/stream_%v_%02d.ts:
master_pl_name=master.m3u8]/tmp/10311326958150343888/stream_%v.m3u8|

/tmp/10311326958150343888/stream.mp4|

[f=fifo:fifo_format=flv:recover_any_error=0:drop_pkts_on_overflow=1:attempt_recovery=1:recovery_wait_time=1:max_recovery_attempts=100:
onfail=ignore:format_opts=flvflags=no_duration_filesize]rtmp://a.rtmp.youtube.com/live2/xxxxxxxxxxxxxxx


  


• No Audio when streaming to Youtube from ffmpeg

  11 février 2019, par Sindre Svendby

  So I’m not able to get sound to youtube when streaming with ffmpeg.

  The command I try to run ;

  ffmpeg \
  
   -f v4l2 \
  
   -vcodec h264 \
  
   -video_size 864x480 \
  
   -r 24 \
  
   -i /dev/video1 \
  
   -f alsa \
  
   -thread_queue_size 1024 \
  
   -ac 2 \
  
   -i plughw:CARD=C920,DEV=0 \
  
   -c:a aac \
  
   -filter:a "volume=1.5" \
  
   -b:a 128k \
  
   -ar 44100 \
  
   -vcodec copy \
  
   -b:v 2000k  \
  
   -r 24 \
  
   -g 48 \
  
   -x264opts no-scenecut \
  
   -bufsize 4096k \
  
   -maxrate 2048k \
  
   -f flv \
  
   rtmp://a.rtmp.youtube.com/live2/STREAM_KODE

  if I switch out the rmtp stream, with a file, like test.flv.
  And then I try to watch this with VLC I do get sound.

  If I check the audio codec in VLC I do see that the codec is aac.
  And as far as I can see from their help pages it is aac that is the correct audio codec to send in.

  I’m not sure how to continue debug this issue, and ideas on this would be great.