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• "Unknown Encoder 'libx264'" error while using FFMPEG

  9 juillet 2018, par newuser

  I have followed the guide given here @ traq.ffmpeg. And everything goes smoothly. But when I try to run a command with FFMPEG to convert something to h.264, I get the error:

  Unknown Encoder 'libx264'

  I'm using Ubuntu 16.04 LTS.

• Unknown Encoder error when using libx264 with FFMPEG

  9 juillet 2018, par newuser

  I have followed the guide given here. And everything goes smoothly. But when I try to run a command with FFMPEG to convert to H.264. I get the error: Unknown Encoder 'libx264' I'm on Ubuntu 16.04 LTS.

• Unknown encoder 'libx264' error in AWS EC2

  6 juillet 2018, par Krzysztof Pastorczyk

  I installed ffmpeg using the following config file:

  packages:
    yum:
      ImageMagick: []
      ImageMagick-devel: []
  commands:
    01-wget:
      command: "wget -O /tmp/ffmpeg.tar.xz https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-64bit-static.tar.xz"
    02-mkdir:
      command: "if [ ! -d /opt/ffmpeg ] ; then mkdir -p /opt/ffmpeg; fi"
    03-tar:
      command: "tar xvf /tmp/ffmpeg.tar.xz -C /opt/ffmpeg --strip 1"
    04-ln:
      command: "if [[ ! -f /usr/bin/ffmpeg ]] ; then ln -sf /opt/ffmpeg/ffmpeg /usr/bin/ffmpeg; fi"
    05-ln:
      command: "if [[ ! -f /usr/bin/ffprobe ]] ; then ln -sf /opt/ffmpeg/ffprobe /usr/bin/ffprobe; fi"
    06-pecl:
      command: "if [ `pecl list | grep imagick` ] ; then pecl install -f imagick; fi"
  

  
  Unfortunatelly during the encode process from carrierwave-video I get the following error:

  Unknown encoder 'libx264'
   (FFMPEG::Error)
      from gems/streamio-ffmpeg-3.0.2/lib/ffmpeg/transcoder.rb:45:in `run'
      from gems/streamio-ffmpeg-3.0.2/lib/ffmpeg/movie.rb:200:in `transcode'
      from gems/carrierwave-video-0.6.0/lib/carrierwave/video.rb:68:in `block in encode_video'
      from gems/carrierwave-video-0.6.0/lib/carrierwave/video.rb:81:in `with_trancoding_callbacks'
      from gems/carrierwave-video-0.6.0/lib/carrierwave/video.rb:62:in `encode_video'
      from app/uploaders/file_uploader.rb:21:in `encode'
  

  
  I guess I'll need to install 'libx264'. Do you know how can I do this on Elastic beanstalk?

  ---

  Problem solved. I used different codec.

  encode_video(:mp4, resolution: :same, custom: %w(-vcodec mpeg4) )
  

• FFmpeg version 4.0.1 cannot find h264 encoder

  3 juillet 2018, par Cristiano

  Today I updated FFmpeg to version 4.0.1 and my existing project cannot compile anymore. In particular avcodec_find_encoder(AV_CODEC_ID_H264) always returns null. I tried to reinstall the libx264 but nothing changed. I also tried to call avcodec_find_encoder_by_name("libx264") and it works, but avcodec_open2() returns error.

• FFMPEG MKV Causing Errors in DASH JS

  24 juin 2018, par Mike

  I'm getting the following browser errors (on all browsers) using Dash JS when transcoding and MKV file:

  ERROR DOMException: Failed to read the 'buffered' property from 'SourceBuffer': This SourceBuffer has been removed from the parent media source.
  

  and...

  dash.all.min.js:26 Uncaught (in promise) DOMException: Failed to load because no supported source was found.
  

  What's weird is I have no issues when I transcode a MP4 file. I'm using FFMPEG in conjunction with Bento4 to build MPEG DASH and HLS files for my video player.

  What I did to single out FFMPEG was to transcode a video that gave me errors on my test server on my local machine (which works) and start the Bento4 process on that file. Doing that, I had no issues and everything played just fine.

  I have removed FFMPEG and reinstalled it multiple times and I always get the same result. I'm sure I screwed something up on my server, but for the life of me I can't seem to figure out where to start with fixing the issue.

  FFMPEG Version

  ffmpeg version N-91321-ge85c608 Copyright (c) 2000-2018 the FFmpeg developers
  
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
  
  configuration: 
  --prefix=/root/ffmpeg_build 
  --pkg-config-flags=--static 
  --extra-cflags=-I/root/ffmpeg_build/include 
  --extra-ldflags=-L/root/ffmpeg_build/lib 
  --extra-libs=-lpthread 
  --extra-libs=-lm 
  --bindir=/root/bin 
  --enable-gpl 
  --enable-libfdk_aac 
  --enable-libfreetype 
  --enable-libmp3lame 
  --enable-libopus 
  --enable-libvorbis 
  --enable-libtheora 
  --enable-libx264 
  --enable-nonfree
  libavutil      56. 18.102 / 56. 18.102
  libavcodec     58. 20.102 / 58. 20.102
  libavformat    58. 17.100 / 58. 17.100
  libavdevice    58.  4.101 / 58.  4.101
  libavfilter     7. 25.100 /  7. 25.100
  libswscale      5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc    55.  2.100 / 55.  2.100
  

  FFMPEG Command

  ffmpeg 
  -i ${DIRECTORY}/${INPUT_FILE} 
  -progress ${DIRECTORY}/transcode.log 
  -s 1920x1080 
  -c:v libx264 
  -b:v 3000k 
  -c:a aac 
  -b:a 32k 
  -minrate 3000k 
  -maxrate 3000k 
  -bufsize 6000k 
  -g 96 
  -keyint_min 96 
  -sc_threshold 0 
  -profile:v high 
  -flags +cgop 
  -movflags faststart 
  -preset ultrafast 
  -pix_fmt yuv420p 
  ${DIRECTORY}/ffmpeg_1920_1080_3000.mp4 &> ${DIRECTORY}/ffmpeg.log
  

  Also, I get no errors and and if I access the output files directly, they play just fine.

  I'm sure I'm not including all the information needed to troubleshoot this, so let me know if there is better information I can provide.

  What would cause FFMPEG to transcode MP4 and not MKV?

  EDIT One last thing, I converted the MKV to an MP4 then used the above command and it worked. It's like MP4 to MP4 is fine, but MKV to MP4 is broke.