Merge 0253929 into d6f371a

lib/hydra/derivatives.rb

@@ -33,6 +33,7 @@ module Derivatives
       autoload :PersistBasicContainedOutputFileService
       autoload :TempfileService
       autoload :MimeTypeService
+      autoload :CapabilityService
     end
 
     # Raised if the timout elapses

lib/hydra/derivatives/processors/video/config.rb

@@ -19,7 +19,15 @@ def audio_attributes
     end
 
     def mpeg4
-      @mpeg4 ||= CodecConfig.new('-vcodec libx264 -acodec libfdk_aac')
+      @mpeg4 ||=
+        @audio_encoder_capability = Hydra::Derivatives::CapabilityService.new
+      @audio_encoder_capability.capture_output
+      audio_encoder = if @audio_encoder_capability.fdk_aac?
+                        'libfdk_aac'
+                      else
+                        'aac'
+                      end
+      CodecConfig.new("-vcodec libx264 -acodec #{audio_encoder}")
     end
 
     def webm

lib/hydra/derivatives/services/capability_service.rb

@@ -0,0 +1,14 @@
+require 'open3'
+
+module Hydra::Derivatives
+  class CapabilityService
+    attr_accessor :ffmpeg_output
+    def capture_output
+      @ffmpeg_output = Open3.capture3('ffmpeg -codecs').to_s
+    end
+
+    def fdk_aac?
+      @ffmpeg_output.include?('--enable-libfdk-aac') || @ffmpeg_output.include?('--with-fdk-aac')
+    end
+  end
+end

spec/services/capability_service_spec.rb

@@ -0,0 +1,19 @@
+require 'spec_helper'
+
+describe Hydra::Derivatives::CapabilityService do
+  before do
+    @aac_capability = described_class.new
+  end
+  describe 'fdk_aac?' do
+    it 'tells you if fdk_aac encoder is installed' do
+      @aac_capability.ffmpeg_output = 'ffmpeg version 2.2.2 Copyright (c) 2000-2014 the FFmpeg developers
+  built on May 14 2014 11:52:48 with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
+  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.2.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libvorbis --enable-libvpx --enable-libfdk-aac'
+      expect(@aac_capability.fdk_aac?).to eq(true)
+    end
+    it 'tells you if fdk_aac encoder is not installed' do
+      @aac_capability.ffmpeg_output = "ffmpeg version 3.1.7 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 6.3.1 (GCC) 20161221 (Red Hat 6.3.1-1) configuration: --prefix=/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 -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic' --extra-ldflags='-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld' --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libcdio --enable-indev=jack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --extra-cflags=-I/usr/include/nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-x11grab --enable-avfilter --enabl e-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect"
+      expect(@aac_capability.fdk_aac?).to eq(false)
+    end
+  end
+end