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• Build ffmpeg on a build machine

  18 juillet 2019, par RDI

  Build ffmpeg on build PC using libx264 and shared libraries (not static).
  I am building on a Red Hat 6.6 Server and final target machine is CentOS 6.6.
  I am trying, as said, to build ffmpeg with encoding enabled (with libx264) and shared libraries ; of course I do not want to install the libraries on the build PC, they should be only extracted and then delivered together with the final RPM.
  After the "./configure" I get all RPMs (related to ffmpeg) but when trying to installing ffmpeg-libs on the build pc it fails because the libx264.so.157 is not found, even if as test I installed it (configure/make/make install) and present at /usr/local/lib.

  Where am I wrong ?

  Thanks

  This is my SPEC file at the moment :

  ldconfig /usr/local/lib
  
  export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
  
  
  
  
  
  # configure 
  
  ./configure \
  
   --enable-gpl --disable-static --enable-shared --extra-cflags="-I/usr/local/include" --extra-ldflags="-L/usr/local/lib" --extra-libs=-ldl --disable-autodetect --disable-doc --disable-postproc --disable-ffplay --disable-everything --enable-encoder=aac --enable-encoder=png --enable-encoder=mjpeg --enable-encoder=libx264 --enable-decoder=aac --enable-decoder=h264 --enable-decoder=mpeg4 --enable-decoder=rawvideo --enable-decoder=png --enable-muxer=mp4 --enable-muxer=stream_segment --enable-muxer=image2 --enable-demuxer=aac --enable-demuxer=h264 --enable-demuxer=mov --enable-demuxer=rtp --enable-parser=aac --enable-parser=h264 --enable-parser=mpeg4video --enable-bsf=aac_adtstoasc --enable-protocol=file --enable-protocol=http --enable-protocol=tcp --enable-protocol=rtp --enable-protocol=udp --enable-indev=xcbgrab --disable-alsa --enable-libxcb --enable-libxcb-xfixes --enable-libxcb-shape --enable-zlib --prefix=%{_prefix} --bindir=%{_bindir} --datadir=%{_datadir}/%{name} --shlibdir=%{_libdir} --enable-alsa --enable-avfilter --enable-avresample --enable-libx264 --enable-filter=scale \

• after 10M ffmpeg stops saving video on nodejs

  12 mai 2016, par cauchy

  I have a nodejs server running using express (express 4). I want to save the video from a few IP cameras on a lab on request. Everything works, but if the video is too long it doesn’t get saved (the limit seems to be 11M).

  I tried using only the command line :

  ffmpeg -i rtsp://192.168.1.189:554/ch01_sub.264 -strict -2 -vcodec
  
  copy -vcodec copy test.mp4

  and this works. But I get into trouble as soon as I use node (note that this is in the node parser, no code in express. I get the same error when running the server) :

  var child_process = require('child_process');
  
  tmpProcess = child_process.spawn('ffmpeg',['-i','rtsp://192.168.1.189:554/ch01_sub.264','-strict','-2','-vcodec','copy','-vcodec','copy',"test.mp4"],{maxBuffer: 10000});

  this runs until test.mp4 is around 11M. tmpProcess is not killed, it keeps running. But after test.mp4 is of certain size I cannot play it back. I get an error saying that "This file contains no playable streams." (this is from Totem, but VLC doesn’t work either).

  Changing maxBuffer doesn’t help. I’m trying to understand what buffer am I overflooding but I cannot get much info from the manual on the api of node.

• Carrierwave and FFMPEG saving to 2 destinations - Rails, Fog, S3

  20 avril 2013, par dodgerogers747

  I have a video model, which uses Carrierwave, Fog, FFMPEG and S3 to handle video files. I have a method in my video model that takes a screenshot before the video is saved to S3. Both Video and screenshot are saved to S3 using 2 Carrierwave Uploader classes, Image_uploader and video_uploader with the video being saved to the Video.file column and screenshot saved at the Video.screenshot.

  This all works as intended, however, FFMPEG also saves a copy of the screenshot to the rails filesystem, "Rails.root/file_is_saved_here". For now I have FFMPEG saving this file into the Rails.root/public/uploads folder along with the tmp files created by Carrierwave.

  How can I get one screenshot saved to S3 without the second being saved on the filesystem ?

  Commit & trace data and

  Running transcoding...
  
  /opt/local/bin/ffmpeg -y -i /Users/me/rails_projects/teebox_network/public/uploads/tmp/200/14_jan_2013_hk.mov -ss 3 -vframes 1 -f image2 /Users/garyrogers/rails_projects/teebox_network/public/uploads/14_jan_2013_hk.mov_screenshot.png
  
  
  
  Transcoding of /Users/me/rails_projects/teebox_network/public/uploads/tmp/200/14_jan_2013_hk.mov to /Users/garyrogers/rails_projects/teebox_network/public/uploads/14_jan_2013_hk.mov_screenshot.png succeeded
  
  
  
  Started POST "/videos" for 127.0.0.1 at 2013-04-19 17:03:07 -0700
  
  Processing by VideosController#create as */*
  
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"DjFIu3971GxKYJzjDFu7LaBx85iOHPa5HzO6PLdSW+8=", "video"=>{"user_id"=>"5", "file"=>#quicktime\r\n", @tempfile=#var/folders/1g/d9qbm7_s0_5fcljtvzysp1gc0000gn/T/RackMultipart20130419-751-19kisab>>}}
  
    User Load (0.5ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 5 LIMIT 1
  
     (0.2ms)  BEGIN
  
    SQL (14.9ms)  INSERT INTO `videos` (`created_at`, `file`, `question_id`, `screenshot`, `updated_at`, `user_id`) VALUES ('2013-04-20 00:03:20', '14_jan_2013_hk.mov', NULL, '14_jan_2013_hk.mov_screenshot.png', '2013-04-20 00:03:20', 5)

  video.rb

  class Video < ActiveRecord::Base
  
  
  
    attr_accessible :user_id, :question_id, :file
  
    belongs_to :question
  
    belongs_to :user
  
  
  
    default_scope order('created_at DESC')
  
  
  
    before_save :take_screenshot
  
  
  
    mount_uploader :file, VideoUploader
  
    mount_uploader :screenshot, ImageUploader
  
  
  
    def to_param
  
      "#{id} - #{File.basename(self.file.path)}".parameterize
  
    end
  
  
  
    private 
  
  
  
    def take_screenshot
  
      FFMPEG.ffmpeg_binary = '/opt/local/bin/ffmpeg'
  
      movie = FFMPEG::Movie.new(self.file.current_path)
  
      self.screenshot = movie.screenshot("#{Rails.root}/public/uploads/#{File.basename(self.file.path)}_screenshot.png", seek_time: 3 )
  
    end
  
  end

  image_uploader class

  class ImageUploader < CarrierWave::Uploader::Base
  
  
  
     include Sprockets::Helpers::RailsHelper
  
     include Sprockets::Helpers::IsolatedHelper
  
  
  
    storage :fog
  
  
  
    process resize_and_pad: [270, 135, '#000']
  
  
  
    def store_dir
  
      "uploads/#{model.class.to_s.underscore}_screenshots/#{mounted_as}_images/#{model.id}"
  
    end
  
  
  
    def extension_white_list
  
      %w(png jpg)
  
      # %w(ogg ogv 3gp mp4 m4v webm mov)
  
    end

  Video uploader class

  class VideoUploader < CarrierWave::Uploader::Base
  
  
  
     include Sprockets::Helpers::RailsHelper
  
     include Sprockets::Helpers::IsolatedHelper
  
  
  
    storage :fog
  
  
  
   def store_dir
  
      "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  
    end
  
  
  
    def extension_white_list
  
      %w(ogg ogv 3gp mp4 m4v webm mov m2v 3g2)
  
      # %w(ogg ogv 3gp mp4 m4v webm mov)
  
    end