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• pcx : check that the packet is large enough before reading the header

  14 août 2016, par Anton Khirnov

  pcx : check that the packet is large enough before reading the header
  Fixes possible invalid reads.
  CC : libav-stable@libav.org
  
  Found-by : Mateusz "j00ru" Jurczyk and Gynvael Coldwind
  

  • [DBH] libavcodec/pcx.c

• Delayed::Job ffmpeg hangs when processing large files using delayed_paperclip

  11 septembre 2016, par Noah Passalacqua

  I am trying to use delayed_job to process large videos and audio files in the background. For the most part everything works. The only time it runs into any hiccups is when larger files are uploaded ( >200MB)

  app/models/userfile.rb

  has_attached_file :userfile,
  
      path: ':dir_path/:style_:filename', 
  
      use_timestamp: false, styles: lambda { |a| UserfileStyles.get(a.instance)[:styles] }, 
  
      only_process: lambda { |a| UserfileStyles.get(a.instance)[:foreground] }, 
  
      source_file_options: { all: '-auto-orient' }
  
  validates_attachment_content_type :userfile, content_type: /.*/ 
  
  process_in_background :userfile, 
  
      url_with_processing: false, 
  
      only_process: lambda { |a| UserfileStyles.get(a.instance)[:background] } 

  app/models/userfile_styles.rb

  module UserfileStyles 
  
      def self.get userfile 
  
          if userfile.video? 
  
              { 
  
                  styles: { 
  
                      screenshot: ['300x300', :jpg], 
  
                      thumbnail: { 
  
                          gemoetry: '100x100#', 
  
                          format: :jpg, 
  
                          convert_options: '-thumbnail 100%' 
  
                      }, 
  
                      preview: { 
  
                          format: 'mp4', 
  
                          convert_options: { 
  
                              output: { ss: '0', t: '10' } 
  
                          }, 
  
                          processors: [:transcoder] 
  
                      }, 
  
                      mp4: { 
  
                          format: 'mp4', 
  
                          convert_options: { 
  
                              output: { 
  
                                  vcodec: 'libx264', 
  
                                  vb: '1000k', 
  
                                  'profile:v': 'baseline', 
  
                                  vf: 'scale=-2:480', 
  
                                  acodec: 'aac', 
  
                                  ab: '128k', 
  
                                  preset: 'slow', 
  
                                  threads: 0, 
  
                                  movflags: 'faststart', 
  
                              } 
  
                          }, 
  
                          processors: [:transcoder] 
  
                      } 
  
                  }, 
  
                  foreground: [:screenshot, :thumbnail], 
  
                  background: [:preview, :mp4] 
  
              }
  
          end 
  
      end 
  
  end

  Example (the first file is being converted from the second file, and the third file is being converted from the fourth file) :

  v2@web1 ~/divshare-v2 $ ls -alh /tmp
  
  -rw-------  1 v2   v2    70M Sep 10 00:01 2158940a8739e7219125179e0d1528c120160909-14061-8dqfx020160909-14061-egeyeq.mp4
  
  -rw-------  1 v2   v2   515M Sep  9 23:57 2158940a8739e7219125179e0d1528c120160909-14061-8dqfx0.mp4
  
  -rw-------  1 v2   v2   145M Sep  9 23:33 76ba144beb8a14b6cf542225ef885a7c20160909-12733-1ui03vo20160909-12733-y7ywn.mp4
  
  -rw-------  1 v2   v2   604M Sep  9 23:27 76ba144beb8a14b6cf542225ef885a7c20160909-12733-1ui03vo.mp4

  I have tried uploading a couple times and with different files. Always gets caught around the same point. However everything works perfectly when smaller videos ( 100-200MB).

  This is the command being ran :

  v2@web1 ~/divshare-v2 $ ps ux | grep ffmpeg
  
  USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
  
  v2       14588 26.4  2.9 849840 240524 ?       Sl   Sep09  12:00 ffmpeg -i /tmp/2158940a8739e7219125179e0d1528c120160909-14061-8dqfx0.mp4 -acodec aac -strict experimental -vcodec libx264 -vb 1000k -profile:v baseline -vf scale=-2:480 -acodec aac -ab 128k -preset slow -threads 0 -movflags faststart -y /tmp/2158940a8739e7219125179e0d1528c120160909-14061-8dqfx020160909-14061-egeyeq.mp4

  Any sort of help debugging this would be awesome.

  NOTE : I copied the above command and manually ran it so that I could see some logs from ffmpeg, and worked flawlessly.

• ffmpeg : error on large input file [duplicate]

  1er octobre 2016, par ingenious

  This question already has an answer here :

  • ffmpeg convert from H.264 (High 4:4:4 Profile) to H.264 (Main Profile)
    
    1 answer
    

  I have a large Mov file with this info :

  

  I want convert it to mp4 by this ffmpeg command :

  ffmpeg -i 57d5092f59418.mov -codec:v libx264 -profile:v high -preset slow 
  
  -b:v 360k -maxrate 424k -bufsize 720k -vf scale=-1:360 -threads 0 -b:a 64k
  
  out.mov

  But I get this error :

  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  detail :

          ffmpeg version N-81784-g92de2c2 Copyright (c) 2000-2016 the FFmpeg developers
  
        built with gcc 5.4.0 (GCC)
  
        configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dx
  
      va2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-lib
  
      ebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --ena
  
      ble-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfree
  
      type --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enab
  
      le-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-lib
  
      openh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschr
  
      oedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheor
  
      a --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvo
  
      rbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --ena
  
      ble-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --e
  
      nable-decklink --enable-zlib
  
        libavutil      55. 30.100 / 55. 30.100
  
        libavcodec     57. 58.100 / 57. 58.100
  
        libavformat    57. 51.100 / 57. 51.100
  
        libavdevice    57.  0.102 / 57.  0.102
  
        libavfilter     6. 63.100 /  6. 63.100
  
        libswscale      4.  1.100 /  4.  1.100
  
        libswresample   2.  2.100 /  2.  2.100
  
        libpostproc    54.  0.100 / 54.  0.100
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '57d5092f59418.mov':
  
        Metadata:
  
          major_brand     : qt
  
          minor_version   : 537199360
  
          compatible_brands: qt
  
          creation_time   : 2016-02-09T07:33:27.000000Z
  
        Duration: 00:00:13.71, start: 0.000000, bitrate: 72247 kb/s
  
          Stream #0:0(eng): Video: qtrle (rle  / 0x20656C72), bgra, 1920x1080, 72242 k
  
      b/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
  
          Metadata:
  
            creation_time   : 2016-02-09T07:33:27.000000Z
  
            handler_name    : Apple Alias Data Handler
  
            encoder         : Animation
  
            timecode        : 00:00:08;17
  
          Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
  
          Metadata:
  
            creation_time   : 2016-02-09T07:33:46.000000Z
  
            handler_name    : Apple Alias Data Handler
  
            timecode        : 00:00:08;17
  
      File 'out.mov' already exists. Overwrite ? [y/N] y
  
      No pixel format specified, yuv444p for H.264 encoding chosen.
  
      Use -pix_fmt yuv420p for compatibility with outdated media players.
  
      x264 [error]: high profile doesn't support 4:4:4
  
      [libx264 @ 00000000006f2f20] Error setting profile high.
  
      [libx264 @ 00000000006f2f20] Possible profiles: baseline main high high10 high42
  
      2 high444
  
      Output #0, mov, to 'out.mov':
  
        Metadata:
  
          major_brand     : qt
  
          minor_version   : 537199360
  
          compatible_brands: qt
  
          Stream #0:0(eng): Video: h264, none, q=2-31, SAR 1:1 DAR 0:0, 29.97 fps (def
  
      ault)
  
          Metadata:
  
            creation_time   : 2016-02-09T07:33:27.000000Z
  
            handler_name    : Apple Alias Data Handler
  
            timecode        : 00:00:08;17
  
            encoder         : Lavc57.58.100 libx264
  
      Stream mapping:
  
        Stream #0:0 -> #0:0 (qtrle (native) -> h264 (libx264))
  
      Error while opening encoder for output stream #0:0 - maybe incorrect parameters
  
      such as bit_rate, rate, width or height

  What shoud I do ?

  thanks