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• Raspberry Pi Youtube Stream with ffmpeg : libx264 unknown

  21 juillet 2016, par tm011036

  I want to use my raspberry pi 3 for a youtube stream via an usb camera. Therefore, I compiled and installed the following tools :

  ffmpeg, libx264, libav-tools

  However, when running the following code i always get an error that the libx264 encoder is unknown :

  ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -i /dev/video0 
  
  -codec:v libx264 -b:v 700k -maxrate 700k -bufsize 700k -an -f 
  
  flv rtmp://a.rtmp.youtube.com/live2/MYYOUTUBECODE

  I installed x264 via clone and make install using this guideline. How can I check if this encoder was installed correctly ? I am already stuck for 2 days on this problem - please help !

  Related hints (e.g. libavcodec-extra codec, type errors) regarding this problem unfortunately also didn’t help further.

  Thank You.

  The entire console output is :

  ffmpeg version N-81043-ga49ed9e Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.9.2 (Raspbian 4.9.2-10)
  
    configuration: 
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 50.100 / 57. 50.100
  
    libavformat    57. 42.100 / 57. 42.100
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
  [video4linux2,v4l2 @ 0x24132f0] The driver changed the time per frame from 1/25 to 1/30
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
  Duration: N/A, start: 161119.368327, bitrate: 147456 kb/s
  
  Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480,     
  
  147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
  
  
  
  Unknown encoder 'libx264' 

• Libvpx unknown encoder with php exec

  5 juin 2016, par Justin Tullock

  I have centos7 with ffmpeg compiled with libvpx. I can run

  ffmpeg -i gif.gif -c:v libvpx -crf 12 -b:v 500K webm.webm

  which works perfectly but when I try the same command with php exec() it returns this :

  {array(16) { [0]=> string(66) "ffmpeg version 2.6.8 Copyright (c) 2000-2016 
  
  the FFmpeg developers" [1]=> string(55) " built with gcc 4.8.5 (GCC) 
  
  20150623 (Red Hat 4.8.5-4)" [2]=> string(1053) " configuration: --
  
  refix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --
  
  incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --
  
  arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -
  
  fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-
  
  switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-
  
  gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 -
  
  -enable-libfaac --enable-nonfree --enable-libfdk-aac --enable-nonfree --
  
  disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame 
  
  --enable-openal --enable-libopenjpeg --enable-libopus --enable-libpulse --
  
  enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora 
  
  --enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265 --
  
  enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --
  
  enable-postproc --enable-pthreads --disable-static --enable-shared --enable-
  
  gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-
  
  runtime-cpudetect" [3]=> string(40) " libavutil 54. 20.100 / 54. 20.100" 
  
  [4]=> string(40) " libavcodec 56. 26.100 / 56. 26.100" [5]=> string(40) " 
  
  libavformat 56. 25.101 / 56. 25.101" [6]=> string(40) " libavdevice 56. 
  
  4.100 / 56. 4.100" [7]=> string(40) " libavfilter 5. 11.102 / 5. 11.102" 
  
  [8]=> string(40) " libavresample 2. 1. 0 / 2. 1. 0" [9]=> string(40) " 
  
  libswscale 3. 1.101 / 3. 1.101" [10]=> string(40) " libswresample 1. 1.100 / 
  
  1. 1.100" [11]=> string(40) " libpostproc 53. 3.100 / 53. 3.100" [12]=> 
  
  string(30) "Input #0, gif, from 'gif.gif':" [13]=> string(29) " Duration: 
  
  N/A, bitrate: N/A" [14]=> string(76) " Stream #0:0: Video: gif, bgra, 
  
  563x307, 25 fps, 25 tbr, 100 tbn, 100 tbc" [15]=> string(24) "Unknown 
  
  encoder 'libvpx'" } int(1)

  ffmpeg -v returns this

  ffmpeg version N-80161-g7e0623b Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
  
    configuration: --enable-libvpx
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 44.100 / 57. 44.100
  
    libavformat    57. 37.101 / 57. 37.101
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 46.100 /  6. 46.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101

  What am I missing ?

• Unknown encoder libvpx [duplicate]

  2 juin 2016, par Justin Tullock

  This question already has an answer here :

  • Error ffmpeg and libvpx to convert to webm [closed]
    
    1 answer
    

  I’m trying to convert gif to webm files. I use

  ffmpeg -i gif.gif -c:v libvpx -crf 12 -b:v 500K webm.webm

  which tells me Unknown encoder ’libvpx’

  But when I search libvpx, this is the output

  ========================= N/S matched: libvpx==========================
  
  libvpx-devel.i686 : Development files for libvpx
  
  libvpx-devel.x86_64 : Development files for libvpx
  
  libvpx.i686 : VP8 Video Codec SDK
  
  libvpx.x86_64 : VP8 Video Codec SDK
  
  libvpx-utils.x86_64 : VP8 utilities and tools

  So I did compile ffmpeg with libvpx correctly ? Or did I miss something ? Thank you for your help.