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• Changing x264 settings on the fly

  22 décembre 2018, par S Red

  I am curious to know if anyone has experience with modifying x264 settings during encoding (this is for testing live streaming hence I need to be able to modify settings based on cpu and upload characteristics).

  



  I saw an API for encoder_reconfig() in x264.h, curious if folks have used that, and if its accessible from ffmpeg ? Is it possible to modify a high-level option like 'preset', or do I need to modify individual options like chroma-me, trellis etc.

  


• 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.

• licheepi zero V3S ffmpeg photo error, kernel uboot is OK

  24 juillet 2023, par xiaocijun

  I use firmware built by someone else and can take photos using fswebcam. Then I changed the root file system to I built Debian with ffmpeg.

  


  I used this command to test my camera

  


  ffmpeg-f v4l2-video_size 800x600 -i /dev/video0-frames 1 out.jpg

  


  But the command line prompts an error

  


  [video4linux2,v4l2 @ 0x5231e0] ioctl(VIDIOC_G_PARM): Inappropriate ioctl for device&#xA;[video4linux2,v4l2 @ 0x5231e0] Time per frame unknown&#xA;[  655.763013] ffmpeg: page allocation failure: order:8, mode:0xcc0(GFP_KERNEL), nodemask=(null)&#xA;[  655.771678] CPU: 0 PID: 236 Comm: ffmpeg Not tainted 5.2.0-licheepi-zero #1&#xA;[  655.778630] Hardware name: Allwinner sun8i Family&#xA;[  655.783363] [<c010ed14>] (unwind_backtrace) from [<c010b72c>] (show_stack&#x2B;0x10/0x14)&#xA;[  655.791107] [<c010b72c>] (show_stack) from [<c0699330>] (dump_stack&#x2B;0x84/0x98)&#xA;[  655.798330] [<c0699330>] (dump_stack) from [<c01fbf30>] (warn_alloc&#x2B;0xcc/0x170)&#xA;[  655.805638] [<c01fbf30>] (warn_alloc) from [<c01fcb40>] (__alloc_pages_nodemask&#x2B;0xacc/0xcf4)&#xA;[  655.814070] [<c01fcb40>] (__alloc_pages_nodemask) from [<c0114350>] (__dma_alloc_buffer.constprop.4&#x2B;0x34/0x17c)&#xA;[  655.824147] [<c0114350>] (__dma_alloc_buffer.constprop.4) from [<c01144bc>] (__alloc_remap_buffer&#x2B;0x24/0x98)&#xA;[  655.833962] [<c01144bc>] (__alloc_remap_buffer) from [<c0114558>] (remap_allocator_alloc&#x2B;0x28/0x30)&#xA;[  655.842996] [<c0114558>] (remap_allocator_alloc) from [<c01146fc>] (__dma_alloc&#x2B;0x16c/0x2c8)&#xA;[  655.851424] [<c01146fc>] (__dma_alloc) from [<c01148d4>] (arm_dma_alloc&#x2B;0x40/0x48)&#xA;[  655.858988] [<c01148d4>] (arm_dma_alloc) from [<c017c928>] (dma_alloc_attrs&#x2B;0x100/0x110)&#xA;[  655.867080] [<c017c928>] (dma_alloc_attrs) from [<c0512da0>] (vb2_dc_alloc&#x2B;0x60/0x104)&#xA;[  655.874994] [<c0512da0>] (vb2_dc_alloc) from [<c050ccac>] (__vb2_queue_alloc&#x2B;0x184/0x444)&#xA;[  655.883165] [<c050ccac>] (__vb2_queue_alloc) from [<c050d4bc>] (vb2_core_reqbufs&#x2B;0x2c4/0x440)&#xA;[  655.891681] [<c050d4bc>] (vb2_core_reqbufs) from [<c0510d34>] (vb2_ioctl_reqbufs&#x2B;0xa0/0xc8)&#xA;[  655.900029] [<c0510d34>] (vb2_ioctl_reqbufs) from [<c04ecd20>] (__video_do_ioctl&#x2B;0x288/0x454)&#xA;[  655.908549] [<c04ecd20>] (__video_do_ioctl) from [<c04ed280>] (video_usercopy&#x2B;0x23c/0x504)&#xA;[  655.916808] [<c04ed280>] (video_usercopy) from [<c02287a8>] (do_vfs_ioctl&#x2B;0xac/0x8cc)&#xA;[  655.924631] [<c02287a8>] (do_vfs_ioctl) from [<c0228ffc>] (ksys_ioctl&#x2B;0x34/0x58)&#xA;[  655.932021] [<c0228ffc>] (ksys_ioctl) from [<c0101000>] (ret_fast_syscall&#x2B;0x0/0x54)&#xA;[  655.939665] Exception stack(0xc3173fa8 to 0xc3173ff0)&#xA;[  655.944713] 3fa0:                   005231e0 00000000 00000003 c0145608 beab41f8 b5857af1&#xA;[  655.952882] 3fc0: 005231e0 00000000 beab4290 00000036 ffffffe7 00000000 005238c0 beab41f8&#xA;[  655.961047] 3fe0: 00000001 beab41b4 b6f167b7 b5857af8&#xA;[  655.966218] Mem-Info:&#xA;[  655.968511] active_anon:3427 inactive_anon:154 isolated_anon:1&#xA;[  655.968511]  active_file:3577 inactive_file:2858 isolated_file:1&#xA;[  655.968511]  unevictable:4 dirty:7 writeback:0 unstable:0&#xA;[  655.968511]  slab_reclaimable:630 slab_unreclaimable:1467&#xA;[  655.968511]  mapped:5008 shmem:429 pagetables:140 bounce:0&#xA;[  655.968511]  free:1421 free_pcp:17 free_cma:0&#xA;[  656.000905] Node 0 active_anon:13708kB inactive_anon:616kB active_file:14308kB inactive_file:11432kB unevictable:16kB isolated(anon):4kB isolated(file):4kB mapped:20032kB dirty:28kB writeback:0kB shmem:1716kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no&#xA;[  656.024016] Normal free:5684kB min:936kB low:1168kB high:1400kB active_anon:13708kB inactive_anon:616kB active_file:14308kB inactive_file:11432kB unevictable:16kB writepending:28kB present:65536kB managed:56092kB mlocked:16kB kernel_stack:392kB pagetables:560kB bounce:0kB free_pcp:68kB local_pcp:68kB free_cma:0kB&#xA;[  656.051697] lowmem_reserve[]: 0 0 0&#xA;[  656.055185] Normal: 173*4kB (ME) 87*8kB (UME) 51*16kB (ME) 25*32kB (ME) 12*64kB (ME) 7*128kB (M) 2*256kB (M) 1*512kB (M) 0*1024kB 0*2048kB 0*4096kB = 5692kB&#xA;[  656.069205] 6865 total pagecache pages&#xA;[  656.072949] 0 pages in swap cache&#xA;[  656.076271] Swap cache stats: add 0, delete 0, find 0/0&#xA;[  656.081486] Free swap  = 0kB&#xA;[  656.084360] Total swap = 0kB&#xA;[  656.087252] 16384 pages RAM&#xA;[  656.090040] 0 pages HighMem/MovableOnly&#xA;[  656.093868] 2361 pages reserved&#xA;[  656.097039] sun6i-csi 1cb4000.csi: dma_alloc_coherent of size 720896 failed&#xA;[video4linux2,v4l2 @ 0x5231e0] ioctl(VIDIOC_REQBUFS): Cannot allocate memory&#xA;/dev/video0: Cannot allocate memory&#xA;</c0101000></c0228ffc></c0228ffc></c02287a8></c02287a8></c04ed280></c04ed280></c04ecd20></c04ecd20></c0510d34></c0510d34></c050d4bc></c050d4bc></c050ccac></c050ccac></c0512da0></c0512da0></c017c928></c017c928></c01148d4></c01148d4></c01146fc></c01146fc></c0114558></c0114558></c01144bc></c01144bc></c0114350></c0114350></c01fcb40></c01fcb40></c01fbf30></c01fbf30></c0699330></c0699330></c010b72c></c010b72c></c010ed14>