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• can't install libvorbis on centos 7, fatal error : ogg/ogg.h : No such file or directory

  14 octobre 2019, par Abdalla Mohamed Aly Ibrahim

  Hello I’ve been trying to install FFmpeg with some libraries using this tutorial
  https://trac.ffmpeg.org/wiki/CompilationGuide/Centos?version=85

  using this command to install the libvorbis

  cd ~/ffmpeg_sources
  
  curl -O -L http://downloads.xiph.org/releases/vorbis/libvorbis-1.3.5.tar.gz
  
  tar xzvf libvorbis-1.3.5.tar.gz
  
  cd libvorbis-1.3.5
  
  ./configure --prefix="$HOME/ffmpeg_build" --with-ogg="$HOME/ffmpeg_build" --disable-shared
  
  make
  
  make install

  i get this error with command make

      ../include/vorbis/codec.h:26:21: fatal error: ogg/ogg.h: No such file or directory
  
       #include <ogg></ogg>ogg.h>
  
  compilation terminated.

  and when i install ffmpeg i get this error

  ERROR: vorbis not found using pkg-config

  Thanks

• Using ffmpeg to encode web dash and audio drift

  1er octobre 2016, par John Joske

  I’m trying to use ffmpeg to create webm-dash encoded files from a usb web cam. Adapted from this example http://wiki.webmproject.org/adaptive-streaming/instructions-to-do-webm-live-streaming-via-dash

  I have managed to get something nearly works with the following command :

  ffmpeg -f video4linux2 -framerate 30 -s 640x360 -i /dev/video0
  -thread_queue_size 512 -f alsa -ar 44100 -ac 2 -i hw:2 -map 0:0 -pix_fmt yuv420p -c:v libvpx-vp9 -s 640x360 -keyint_min 60 -g 60 -speed 6 -tile-columns 4 -frame-parallel
  1 -threads 8 -static-thresh 0 -max-intra-rate 300 -deadline realtime
  -lag-in-frames 0 -error-resilient 1 -f webm_chunk -header video_360.hdr" -chunk_start_index 1 video_360_%d.chk -map 1:0 -c:a libvorbis -b:a 128k -ar 44100
  -f webm_chunk -copytb 1 -audio_chunk_duration 2000 -header video_171.hdr -chunk_start_index 1 video_171_%d.chk

  However over a period of time the audio chunks slowly get behind the video chunks, can anyone suggest a way to ensure they stay the same.

• Compile FFmpeg with openssl for macOS

  23 juin 2017, par H. Wilson

  Hi I would like to ask how to compile ffmpeg with openssl for macOS.

  When I type https in ffmpeg to download / encode webstream from the website I always get an error

  "https protocol not found, recompile FFmpeg with openssl, guntls. or securetransport enabled"

  whilst http does work (some websites didn’t allow http as I got an error "HTTP error 403 Forbidden though)

  https://trac.ffmpeg.org/wiki/CompilationGuide/MacOSX

  I have read the link above but I am unsure about the process as I don’t use homebrew to install ffmpeg but built myself.

  I am the very beginner using ffmpeg and any help would be appreciated..
  I hope somebody could show me its process to compile ffmpeg with openssl.

  For further advice, I am wondering if the function of ffmpeg I built myself is same as the static one here : ttps ://ffmpeg.zeranoe.com/builds/

  I built ffmpeg for mac by this website : http://ericholsinger.com/install-ffmpeg-on-a-mac

  Thanks in advance