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• Restreaming raw data to ffserver gives rc buffer overflow error

  19 octobre 2017, par Nithish Reddy J

  My goal here is to fetch stream from live url to opencv python, process this stream and restream it to ffserver. Below is the command i use :

  python store.py | ffmpeg -f rawvideo -pixel_format yuv420p -video_size
  544x576 -framerate 25 -i - http://localhost:8090/feed1.ffm

  Below is my ffserver.conf file

  <feed>
  
  
  
  File /tmp/feed1.ffm
  
  FileMaxSize 3G
  
  ACL allow 127.0.0.1
  
  
  
  </feed>
  
  
  
  <stream>
  
  Format mpeg
  
  VideoBitRate 128
  
  VideoBufferSize 60000
  
  VideoFrameRate 25
  
  VideoSize 544x576
  
  VideoGopSize 12
  
  NoAudio
  
  VideoQMax 45
  
  ACL allow localhost
  
  ACL allow 192.168.0.0 192.168.255.255
  
  
  
  </stream>

  and when i run the command stated above it gives me the error

  [mpeg1video @ 0x1c6e6c0] rc buffer underflow

  and to test my feed when i hit the command

  ffplay http://localhost:8090/test1.mpg

  I can see the output feed being played but there is a green mask applied on the feed.Attaching Image :
  

• How to reduce usage of CPU/memory by ffmpeg ?

  10 octobre 2022, par Sanasar Yuzbashyan

  I know there are many questions about this topic, but I still haven't found what I'm looking for. I am using ffmpeg on the website to create a video from image+audio+waveform.
In the beginning my code used 100% of CPU to create video. After I started looking for a performance solution, I found several solutions and used them. I added the following commands
  
nice -19 cpulimit -l 30 -- ffmpeg -y -threads 1 -i ... after which everything worked very well and the CPU usage did not exceed 35-45%. But when I tried to run this command at the same time 4 times everything got really bad. Here is a picture of what happened.

  


  

  


  This is my code

  


  nice -19 cpulimit -l 30 -- ffmpeg -y -i image.jpg -i audio.mp3 -filter_complex "[0:v]scale=1280x720[image]; [image]drawbox=x=0:y=720:w=1280:h=130:color=red@1:t=fill[img];[1:a]showwaves=s=1280x130:colors=green:mode=cline,format=yuva420p[wave];[img][wave]overlay=0:350[outv]" map 1:a -c:a copy -map "[outv]" -c:v libx264 -preset medium -threads 1 output.mp4

  


  And now I cannot understand how I can organize all this on a production server where 1000 users can simultaneously run this command when they create a video. I thought it would be better if a separate server was used for such resource-intensive processes so that the work of the site would not interrupt. But still, how can I organize this whole difficult process when I have a lot of users on my site, and they can simultaneously use this functionality ? Thank you in advance.

  


• Enabling libmp3lame for FFMPEG on elastic beanstalk

  13 octobre 2017, par Adam Sith

  I am trying to enable libmp3lame with FFMPEG in elastic beanstalk (Amazon Redhat Linux machine).

  I am able to successfully install FFMPEG in /ffmpeg.config with the following script :

  # .ebextensions/ffmpeg.config
  
  
  
  packages:
  
    yum:
  
      autoconf: []
  
      automake: []
  
      cmake: []
  
      freetype-devel: []
  
      gcc: []
  
      gcc-c++: []
  
      git: []
  
      libtool: []
  
      make: []
  
      nasm: []
  
      pkgconfig: []
  
      zlib-devel: []
  
  sources:
  
    /usr/local/src: http://ffmpeg.org/releases/ffmpeg-3.2.tar.bz2
  
  commands:
  
    ffmpeg_install:
  
        cwd: /usr/local/src/ffmpeg-3.2
  
        command: sudo ./configure --prefix=/usr && make && make install

  I need to install libmp3lame however. I’ve tried to do this with an --enable-libmp3lame flag and the directions here. The modified script :

  packages:
  
  yum:
  
      autoconf: []
  
      automake: []
  
      cmake: []
  
      freetype-devel: []
  
      gcc: []
  
      gcc-c++: []
  
      git: []
  
      libtool: []
  
      make: []
  
      nasm: []
  
      pkgconfig: []
  
      zlib-devel: []
  
  sources:
  
    /usr/local/src: http://ffmpeg.org/releases/ffmpeg-3.2.tar.bz2
  
  commands:
  
    01-install_libmp3lame:
  
        cwd: /usr/local/src/
  
        command: curl -L -O http://downloads.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz && tar xzvf lame-3.99.5.tar.gz && cd lame-3.99.5 && ./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin" --disable-shared --enable-nasm && make && make install
  
    02-ffmpeg_install:
  
        cwd: /usr/local/src/ffmpeg-3.2
  
        command: sudo ./configure --enable-libmp3lame && --prefix=/usr && make && make install

  This doesn’t work. Command 01-install_libmp3lame completes. Command 02-ffmpeg_install fails because :

  [2017-10-12T20:55:19.324Z] INFO  [24606] - [Application update app-8fe3-123456_7895@111/AppDeployStage0/EbExtensionPreBuild/Infra-EmbeddedPreBuild/prebuild_3_clover_platform/Command 02-ffmpeg_install] : Activity execution failed, because: ERROR: libmp3lame >= 3.98.3 not found

  I have tried installing libmp3lame in /ffmpeg-3.2 and got the same issue.