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• NVIDIA accelerated ffmpeg (nvenc_h264 ) is dead slow on Amazon G2 instance

  16 novembre 2015, par Abhijit Pathak

  FFMPEG when compiled with following options give abysmal performance on Amazon G2 instance( g2.2xlarge, GRID K520) when compared with standalone Dell-Precision-T1700 (Quadro-k620)

  "--enable-nonfree --enable-gpl --enable-version3 --enable-shared --enable pthreads [b]--enable-nvenc[/b] --enable-runtime-cpudetect --disable-doc --enable-libmp3lame"

  Above ffmpeg binary took 66 seconds to transcode 5.22 mins BVE_Localize.mp4 file with following command.

  time ffmpeg -y -i BVE_Localize.mp4 -strict -2 -vcodec nvenc_h264 -b 5000k -acodec aac -ab 256k -f mpegts BVELocalize.ts ( took 1m6.990s on G2)

  When same ffmpeg command is executed on Dell-Precision-T1700 (Xeon Dual core, Quadro K620) based workstation takes 0m41.572s.

  I would like ffmpeg to perform better on Amazon G2 instance. What do you think I might be missing ? My Amazon G2 instance configuration is Ubuntu 14.04 64 bit, Cuda 7.0 , 352.55 drivers, MSI disabled,NVIDIA SDK 5.0.1

• What is the right command to convert an mp3 file to the required codec version (MPEG version 2) and bit rate (48 kbps) for Amazon Alexa SSML ?

  6 mai 2017, par Asimov4

  I am trying to convert an mp3 file to the format expected by the audio tag in the Amazon Alexa SSML markup language as described here : https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/speech-synthesis-markup-language-ssml-reference

  The documentation recommends using https://www.ffmpeg.org/ffmpeg.html

  I tried this command but can’t find the right codec to use :
  ffmpeg -y -i input.mp3 -ar 44100 -ab 48k -codec:a mpeg2 -ac 1 output.mp3

  I know I need to convert the file because Alexa fails with the following error : The audio is not of a supported MPEG version

• Install gstreamer on EC2 Amazon Linux AMI ?

  6 décembre 2015, par vy32

  I’m trying to install QT5.5 on Amazon EC2 Linux, which apparently requires that I install some kind of multimedia support. It looks like that comes from gstreamer.

  yum search gstreamer turns up :

  [ec2-user@ip-172-30-1-58 ~]$ yum search gstreamer
  
  Loaded plugins: priorities, update-motd, upgrade-helper
  
  23 packages excluded due to repository priority protections
  
  ============================================== N/S matched: gstreamer ==============================================
  
  gstreamer-ffmpeg.x86_64 : GStreamer FFmpeg-based plug-ins
  
  gstreamer-ffmpeg-debuginfo.x86_64 : Debug information for package gstreamer-ffmpeg
  
  gstreamer-plugins-bad.x86_64 : GStreamer streaming media framework "bad" plug-ins
  
  gstreamer-plugins-bad-debuginfo.x86_64 : Debug information for package gstreamer-plugins-bad
  
  gstreamer-plugins-bad-nonfree.x86_64 : Non Free GStreamer streaming media framework "bad" plug-ins
  
  gstreamer-plugins-bad-nonfree-debuginfo.x86_64 : Debug information for package gstreamer-plugins-bad-nonfree
  
  gstreamer-plugins-ugly.x86_64 : GStreamer streaming media framework "ugly" plug-ins
  
  gstreamer-plugins-ugly-debuginfo.x86_64 : Debug information for package gstreamer-plugins-ugly
  
  gstreamer-plugins-ugly-devel-docs.noarch : Development documentation for the GStreamer "ugly" plug-ins
  
  gstreamer1-libav.x86_64 : GStreamer 1.0 libav-based plug-ins
  
  gstreamer1-libav-debuginfo.x86_64 : Debug information for package gstreamer1-libav
  
  gstreamer1-plugins-bad-freeworld.x86_64 : GStreamer 1.0 streaming media framework "bad" plug-ins
  
  gstreamer1-plugins-bad-freeworld-debuginfo.x86_64 : Debug information for package gstreamer1-plugins-bad-freeworld
  
  gstreamer1-plugins-ugly.x86_64 : GStreamer 1.0 streaming media framework "ugly" plug-ins
  
  gstreamer1-plugins-ugly-debuginfo.x86_64 : Debug information for package gstreamer1-plugins-ugly
  
  gstreamer1-plugins-ugly-devel-docs.noarch : Development documentation for the GStreamer "ugly" plug-ins
  
  gstreamer1-vaapi.x86_64 : GStreamer plugins to use VA API video acceleration
  
  gstreamer1-vaapi-debuginfo.x86_64 : Debug information for package gstreamer1-vaapi
  
  gstreamer1-vaapi-devel.x86_64 : Development files for gstreamer1-vaapi
  
  qt-gstreamer.x86_64 : C++ bindings for GStreamer with a Qt-style API
  
  qt-gstreamer-debuginfo.x86_64 : Debug information for package qt-gstreamer
  
  qt-gstreamer-devel.x86_64 : Header files and development documentation for qt-gstreamer
  
  
  
    Name and summary matches only, use "search all" for everything.
  
  [ec2-user@ip-172-30-1-58 ~]$ %

  However, when I try to install one of these, I get this error :

  $ sudo yum install -y gstreamer-ffmpeg
  
  Loaded plugins: priorities, update-motd, upgrade-helper
  
  23 packages excluded due to repository priority protections
  
  Resolving Dependencies
  
  --> Running transaction check
  
  ---> Package gstreamer-ffmpeg.x86_64 0:0.10.13-15.el7.nux will be installed
  
  --> Processing Dependency: liborc-0.4.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstvideo-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstreamer-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstpbutils-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstbase-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstaudio-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Finished Dependency Resolution
  
  Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
  
             Requires: liborc-0.4.so.0()(64bit)
  
  Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
  
             Requires: libgstreamer-0.10.so.0()(64bit)
  
  Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
  
             Requires: libgstbase-0.10.so.0()(64bit)
  
  Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
  
             Requires: libgstaudio-0.10.so.0()(64bit)
  
  Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
  
             Requires: libgstpbutils-0.10.so.0()(64bit)
  
  Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
  
             Requires: libgstvideo-0.10.so.0()(64bit)
  
   You could try using --skip-broken to work around the problem
  
   You could try running: rpm -Va --nofiles --nodigest
  
  [ec2-user@ip-172-30-1-58 ~]$ 

  Supplying the suggested --skip-broken doesn’t help :

  [ec2-user@ip-172-30-1-58 ~]$ sudo yum install -y gstreamer-ffmpeg --skip-broken
  
  Loaded plugins: priorities, update-motd, upgrade-helper
  
  23 packages excluded due to repository priority protections
  
  Resolving Dependencies
  
  --> Running transaction check
  
  ---> Package gstreamer-ffmpeg.x86_64 0:0.10.13-15.el7.nux will be installed
  
  --> Processing Dependency: liborc-0.4.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstvideo-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstreamer-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstpbutils-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstbase-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  --> Processing Dependency: libgstaudio-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
  
  
  
  Packages skipped because of dependency problems:
  
      gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 from nux-dextop
  
  [ec2-user@ip-172-30-1-58 ~]$ 

  So how do I install gstreamer-ffmpeg ? Why aren’t the dependencies automatically being followed ?