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• Trying to stream H264 with Janus Gateway to web browser

  15 mars 2021, par sibrown

  I have installed Janus-Gateway using the very comprehensive install instructions on an Ubuntu 18.04LTS machine.
I have configured the streaming config file (janus.plugin.streaming.jcfg) with :

  



  gstreamer-sample: {
  type = "rtp"
  id = 1
  description = "H.264 live stream coming from gstreamer"
  audio = false
  video = true
  videoport = 5004
  videopt = 96
  videortpmap = "H264/90000"
  videofmtp = "profile-level-id=42e01f;packetization-mode=1"
}


  



  (I didn't change the name because that required least changes to other files.)

  



  Having then started the server, I then take a pre-encoded stream and send that to the server with ffmpeg :

  



  ffmpeg -i udp://127.0.0.1:9034 -c:v copy -an -f rtp rtp://127.0.0.1:5004?pkt_size=1300


  



  Opening up the demo webpage the server comes with, I go to streaming demos, and choose the "gstreamer" demo and click start. The right hand half of the screen produces a spinning circle, but tells me that it is receiving data at the appropriate rate for the stream I'm sending. So if it's receiving the stream, why isn't it playing it ?

  



  Cheers,
Simon

  


• ffmpeg usb Web cam recording terminates randomly before set duration

  16 mars 2018, par pomptondrive

  The output of this script is just fine ; it’s pretty much what I want. But it seems to terminate randomly. My next step will be to try this on another computer to see if the issue persists.

  My configuration :
  Dell Precision laptop, m4400
  2x Intel(R) Core(TM)2 Duo CPU P8600 @ 2.40GHz
  Linux Mint 18.3 Sylvia
  Kernel : Linux 4.4.0-116-generic (x86_64)
  Card : NVIDIA G96GLM [Quadro FX 770M]
  ffmpeg version 2.8.11-0ubuntu0.16.04.1
  USB Camera-B4.09.24.1 Sony Playstation Eye

  And this is the script that I’m running - the last time it recorded for about three hours and forty-five minutes, before that it was about 55 minutes ; once it ran five and a half hours :

  #!/bin/bash  
  
  echo "This is a shell script to make a timelapse video."  
  
  ffmpeg \
  
  -f v4l2 -input_format yuyv422 -video_size 640x480 -framerate 5 -t 09:00:00 -i /dev/video0 \
  
  -vf "select=not(mod(n\,5)),setpts=N/(60*TB),fps=60, drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf:text='%{localtime\:%T}':x=20:y=20:fontcolor=white" \
  
  -c:v libx264 -preset superfast -crf 23 -pix_fmt yuv422p -g 15 -keyint_min 15 \
  
  -f mpegts /media/dkm/OneTB/Video/Timelapse_$(date +%Y-%m-%d_%H.%M.%S).ts

  Any suggestions would be appreciated. Thanks !

• avutil/mem : remove av_realloc / av_malloc incompatibility warning

  21 avril 2015, par Michael Niedermayer

  avutil/mem : remove av_realloc / av_malloc incompatibility warning
  memalign() is not guranteed to be compatible with free() or realloc()
  
  and for platforms in this category we have —enable-memalign-hack
  
  (which should be enabled automatically if such system is detected)
  
  Trying to somehow half support systems that can free() memalign memory
  
  but not reallocate it seems not worth the amount of work needed to
  
  keep 2 then incompatible allocation systems and ensure their
  
  seperation. That is unless this would affect a major platform
  
  on which we want to avoid the memalign hack code
  The warnings also cause wasted time and effort as people try
  
  to maintain a separation that does not exist currently.
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavutil/mem.h