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• ffmpeg : split mp3, encode aac and join produce artifacts and empty space

  18 juin 2016, par aganeiro

  Source mp3

      ffprobe -show_frames -select_streams a -print_format csv -show_entries  
  
   frame=index,pkt_dts_time ~/demo_files/000.orig.5352357791787324393.mp3
  
  frame,0.000000
  
  frame,0.026122
  
  frame,0.052245
  
  frame,0.078367

  every part I make with command, -ss position and -t time I got and calculate from previous ffprobe output

      /home/xxx/bin/ffmpeg -analyzeduration 50000000 -probesize 50000000  
  
  -ss 0.000000 -i /home/xxx/demo_files/000.orig.5352357791787324393.mp3  
  
  -s 0 -t 0.926276 -flags +global_header -c:a libfdk_aac -strict -2  
  
  -b:a 64k -ac 2 -ar 44100 -vn -f mpegts -y /tmp/p0.ts
  
  
  
      /home/xxx/bin/ffmpeg -analyzeduration 50000000 -probesize 50000000  
  
  -ss 1.018776 -i /home/xxx/demo_files/000.orig.5352357791787324393.mp 
  
  -s 0 -t 0.900153 -flags +global_header -c:a libfdk_aac -strict -2  
  
  -b:a 64k -ac 2 -ar 44100 -vn -f mpegts -y /tmp/p1.ts

  it’s produce

  [mp3 @ 0x39ca980] Estimating duration from bitrate, this may be inaccurate
  
      Input #0, mp3, from '/home/xxx/demo_files/000.orig.5352357791787324393.mp3':
  
      Duration: 00:05:17.20, start: 0.000000, bitrate: 320 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
  
      [mpegts @ 0x39ccea0] Using AVStream.codec to pass codec  
  
  parameters to muxers is deprecated, use AVStream.codecpar instead.
  
      [mpegts @ 0x39ccea0] frame size not set
  
      Output #0, mpegts, to '/tmp/p0.ts':
  
        Metadata:
  
          encoder         : Lavf57.38.100
  
          Stream #0:0: Audio: aac (libfdk_aac), 44100 Hz, stereo, s16, 64 kb/s
  
          Metadata:
  
            encoder         : Lavc57.46.100 libfdk_aac
  
      Stream mapping:
  
        Stream #0:0 -> #0:0 (mp3 (native) -> aac (libfdk_aac))
  
      Press [q] to stop, [?] for help
  
      size=      10kB time=00:00:00.92 bitrate=  92.3kbits/s speed=39.8x    
  
      video:0kB audio:8kB subtitle:0kB other streams:0kB global  
  
  headers:0kB muxing overhead: 24.619143%
  
        Duration: 00:00:00.63, start: 1.400000, bitrate: 127 kb/s

  Part info

      ffmpeg -hide_banner -i /tmp/p0.ts 2>&1 |grep -P 'Duration|Stream'
  
      Duration: 00:00:00.95, start: 1.400000, bitrate: 90 kb/s
  
      Stream #0:0[0x100]: Audio: aac (LC) ([15][0][0][0] / 0x000F),  
  
  44100 Hz, stereo, fltp, 68 kb/s

  Then I join all parts together with

      /home/xxx/bin/ffmpeg -i /tmp/p0.ts -i /tmp/p1.ts -i /tmp/p2.ts  
  
  -i /tmp/p3.ts -i /tmp/p4.ts -i /tmp/p5.ts -filter_complex  
  
  "[0:a]asetpts=PTS-STARTPTS[a0];[1:a]asetpts=PTS-STARTPTS[a1];  
  
  [2:a]asetpts=PTS-STARTPTS[a2];[3:a]asetpts=PTS-STARTPTS[a3];  
  
  [4:a]asetpts=PTS-STARTPTS[a4];[5:a]asetpts=PTS-STARTPTS[a5];  
  
  [a0][a1][a2][a3][a4][a5] concat=n=6:v=0:a=1 [a]"  
  
  -map [a] -strict experimental -fflags +genpts -flags +global_header  
  
  -c libfdk_aac -bsf:a aac_adtstoasc -y /tmp/res.m4a

  waveform of original and joined on the left
  

  So, as you can see joined have delays and waveforms starte later. Why ? maybe it depens that all encoded parts have start time 1.400000, ?? How to set start time to 0 on encode ?

  Also I tried to cut empty space on joining with filter_complex but result stil not good and contains artifacts because trim position looks different in every part.

      /home/xxx/bin/ffmpeg -i /tmp/p0.ts -i /tmp/p1.ts -i /tmp/p2.ts  
  
  -i /tmp/p3.ts -i /tmp/p4.ts -i /tmp/p5.ts -filter_complex  
  
  "[0:a]atrim=0.020000,asetpts=PTS-STARTPTS[a0];  
  
  [1:a]atrim=0.020000,asetpts=PTS-STARTPTS[a1];  
  
  [2:a]atrim=0.020000,asetpts=PTS-STARTPTS[a2];  
  
  [3:a]atrim=0.020000,asetpts=PTS-STARTPTS[a3];  
  
  [4:a]atrim=0.020000,asetpts=PTS-STARTPTS[a4];  
  
  [5:a]atrim=0.020000,asetpts=PTS-STARTPTS[a5];  
  
  [a0][a1][a2][a3][a4][a5] concat=n=6:v=0:a=1 [a]"  
  
  -map [a] -strict experimental -fflags +genpts  
  
  -flags +global_header -c libfdk_aac -bsf:a aac_adtstoasc  
  
  -y /tmp/res.m4a

  Whyyyy and how to solve it ?

• Vagrant provision fails to execute the next script without an obvious reason why

  14 juin 2016, par JakeTheSnake

  I’ve created/co-opted several bash scripts to provision my guest Ubuntu 14.04 OS ; the one giving me trouble right now is installing ffmpeg. When the script finishes, vagrant simply does nothing save for sending SSH keep-alives.

  Host OS : Windows 7 x64

  The last output before the infinitely repeating keep-alives is :

  INSTALL libavutil/sha.h
  
  INSTALL libavutil/sha512.h
  
  INSTALL libavutil/stereo3d.h
  
  INSTALL libavutil/threadmessage.h
  
  INSTALL libavutil/time.h
  
  INSTALL libavutil/timecode.h
  
  INSTALL libavutil/timestamp.h
  
  INSTALL libavutil/tree.h
  
  INSTALL libavutil/twofish.h
  
  INSTALL libavutil/version.h
  
  INSTALL libavutil/xtea.h
  
  INSTALL libavutil/tea.h
  
  INSTALL libavutil/lzo.h
  
  INSTALL libavutil/avconfig.h
  
  INSTALL libavutil/ffversion.h
  
  
  
  DEBUG ssh: stdout: INSTALL      libavutil/libavutil.pc
  
  
  
  DEBUG ssh: stdout: Done
  
  
  
  DEBUG ssh: Sending SSH keep-alive...
  
  DEBUG ssh: Sending SSH keep-alive...
  
  DEBUG ssh: Sending SSH keep-alive...

  Here are the relevant scripts :

  Vagrantfile

  # -*- mode: ruby -*-
  
  # vi: set ft=ruby :
  
  
  
  # All Vagrant configuration is done below. The "2" in Vagrant.configure
  
  # configures the configuration version (we support older styles for
  
  # backwards compatibility). Please don't change it unless you know what
  
  # you're doing.
  
  Vagrant.configure(2) do |config|
  
    # The most common configuration options are documented and commented below.
  
    # For a complete reference, please see the online documentation at
  
    # https://docs.vagrantup.com.
  
  
  
    # Every Vagrant development environment requires a box. You can search for
  
    # boxes at https://atlas.hashicorp.com/search.
  
    config.vm.box = 'ubuntu/trusty64'
  
    config.vm.hostname = 'dev'
  
  
  
    config.ssh.forward_agent = true
  
    config.ssh.pty = true
  
  
  
    # Create a private network, which allows host-only access to the machine
  
    # using a specific IP.
  
    config.vm.network :private_network, type: :dhcp, auto_config: false
  
  
  
    # Create a public network, which generally matched to bridged network.
  
    # Bridged networks make the machine appear as another physical device on
  
    # your network.
  
    config.vm.network :public_network,
  
                      ip: '192.168.11.14',
  
                      bridge: 'Realtek PCIe GBE Family Controller'
  
  
  
    # Share an additional folder to the guest VM. The first argument is
  
    # the path on the host to the actual folder. The second argument is
  
    # the path on the guest to mount the folder. And the optional third
  
    # argument is a set of non-required options.
  
    #
  
    # Do not share root directory of vagrant
  
    # config.vm.synced_folder '.', '/vagrant', disabled: true
  
    # Share ruby repository directories
  
    config.vm.synced_folder '.',
  
                            '/home/vagrant/apps',
  
                            nfs: true,
  
                            mount_options: [
  
                              'nfsvers=3',
  
                              'vers=3',
  
                              'actimeo=1',
  
                              'rsize=8192',
  
                              'wsize=8192',
  
                              'timeo=14',
  
                              :nolock,
  
                              :udp,
  
                              :intr,
  
                              :user,
  
                              :auto,
  
                              :exec,
  
                              :rw
  
                            ]
  
  
  
    # Provider-specific configuration so you can fine-tune various
  
    # backing providers for Vagrant. These expose provider-specific options.
  
    # Example for VirtualBox:
  
    #
  
    config.vm.provider :virtualbox do |vb|
  
      # Display the VirtualBox GUI when booting the machine
  
      vb.gui = true
  
  
  
      # Use VBoxManage to customize the VM.
  
      vb.name = 'Ubuntu'
  
      vb.cpus = 4
  
      vb.memory = 2048
  
      vb.customize ['modifyvm', :id, '--vram', 64]
  
      vb.customize ['modifyvm', :id, '--audio', :dsound]
  
      vb.customize ['modifyvm', :id, '--audiocontroller', :ac97]
  
      vb.customize ['modifyvm', :id, '--clipboard', :bidirectional]
  
    end
  
  
  
    # Provisioning
  
    config.vm.provision :shell, path: './provisioning/user/install-apps.sh',
  
                                privileged: false, name: 'Applications'
  
    config.vm.provision :shell, path: './provisioning/user/install-rvm.sh',
  
                                args: 'stable', privileged: false, name: 'RVM'
  
    config.vm.provision :shell, path: './provisioning/user/install-ruby.sh',
  
                                args: '2.3.1', privileged: false, name: 'Ruby'
  
    config.vm.provision :shell, path: './provisioning/user/install-ruby-gems.sh',
  
                                privileged: false, name: 'Ruby Gems'
  
    config.vm.provision :shell, path: './provisioning/root/install-nginx.sh',
  
                                args: '1.9.9', name: 'Nginx'
  
  
  
    config.vm.provision :chef_solo do |chef|
  
      # chef.version = '12.10.40'
  
  
  
      # Paths to your cookbooks (on the host)
  
      chef.cookbooks_path = ['cookbooks']
  
      # Add chef recipes
  
      chef.add_recipe 'apt'
  
      chef.add_recipe 'git' # Is required for NPM
  
      chef.add_recipe 'sqlite'
  
      chef.add_recipe 'mysql'
  
      chef.add_recipe 'nodejs'
  
      chef.add_recipe 'memcached'
  
      chef.add_recipe 'imagemagick'
  
      chef.add_recipe 'optipng'
  
      chef.add_recipe 'sublime-text'
  
      chef.add_recipe 'tomcat'
  
    end
  
  end

  install-apps.sh

  #!/usr/bin/env bash
  
  
  
  echo Turning off console beeps...
  
  grep '^set bell-style none' /etc/inputrc || echo 'set bell-style none' >> /etc/inputrc
  
  
  
  echo Installing languages
  
  sudo apt-get -y update
  
  sudo locale-gen en_US en_US.UTF-8
  
  sudo dpkg-reconfigure locales
  
  
  
  echo Installing essential apps
  
  sudo apt-get -y install build-essential curl yasm
  
  
  
  echo Installing desktop apps
  
  sudo apt-get -y install ubuntu-desktop
  
  
  
  hash ffmpeg 2>/dev/null || {
  
    # Build ffmpeg
  
    echo Installing ffmpeg
  
  
  
    sudo apt-get -y install autoconf automake libass-dev libfreetype6-dev \
  
      libsdl1.2-dev libtheora-dev libtool libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev \
  
      libxcb-xfixes0-dev pkg-config texinfo zlib1g-dev libx264-dev libmp3lame-dev libopus-dev
  
  
  
    mkdir ~/ffmpeg_sources
  
    cd ~/ffmpeg_sources
  
    wget http://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2
  
    tar xjvf ffmpeg-snapshot.tar.bz2
  
    cd ffmpeg
  
    PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
  
      --prefix="$HOME/ffmpeg_build" \
  
      --pkg-config-flags="--static" \
  
      --extra-cflags="-I$HOME/ffmpeg_build/include" \
  
      --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
  
      --bindir="$HOME/bin" \
  
      --enable-gpl \
  
      --enable-libass \
  
      --enable-libfreetype \
  
      --enable-libmp3lame \
  
      --enable-libopus \
  
      --enable-libtheora \
  
      --enable-libvorbis \
  
      --enable-libx264 \
  
      --enable-nonfree
  
  
  
    PATH="$HOME/bin:$PATH" make
  
    make install
  
    make distclean
  
    hash -r
  
  
  
    source ~/.profile
  
  }
  
  
  
  echo Done
  
  exit 0

  install-rvm.sh

  #!/usr/bin/env bash
  
  
  
  echo Installing RVM gpg key
  
  gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 --trust-model always
  
  
  
  echo Installing RVM
  
  \curl -sSL https://get.rvm.io | bash -s $1
  
  
  
  exit 0

  I won’t include the other scripts for the sake of brevity. When logging into vagrant with the gui nothing seems out of the ordinary, and ffmpeg is available...but nothing else is provisioned. No RVM, no Nginx, nothing.

• Configure ffmpeg to work with native client

  11 juin 2016, par Mohammad Abu Musa

  I followed the steps https://chromium.googlesource.com/webports/+/master to port ffmpeg to native client. I do not know what is the issue here. here are the configuration and here what I get

  NACL_ARCH=pnacl TOOLCHAIN=pnacl make ffmpeg

  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/\@anchor{ <-- HERE (?:[^\}]*)\}/ at /home/user/Desktop/webports/src/out/build/ffmpeg/ffmpeg-2.6.1/doc/texi2pod.pl line 387.
MAN doc/ffmpeg.1
MAN doc/ffprobe.1
MAN doc/ffmpeg-all.1
MAN doc/ffprobe-all.1
LD  ffmpeg_g
LD  ffprobe_g
/home/user/Desktop/webports/src/out/build/ffmpeg/ffmpeg-2.6.1/Makefile:124: recipe for target 'ffprobe_g' failed
make[1]: *** [ffprobe_g] Error 247
make[1]: *** Waiting for unfinished jobs....
/home/user/Desktop/webports/src/out/build/ffmpeg/ffmpeg-2.6.1/Makefile:124: recipe for target 'ffmpeg_g' failed
make[1]: *** [ffmpeg_g] Error 247
make[1]: Leaving directory '/home/user/Desktop/webports/src/out/build/ffmpeg/build_pnacl'
webports: Build failed: 'ffmpeg' [pnacl/release]
Makefile:89: recipe for target 'ffmpeg' failed
make: *** [ffmpeg] Error 1