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• Change AVI creation date with ffmpeg ?

  1er novembre 2016, par brock

  As far as I can tell the following ffmpeg command should copy all existing metadata in the input file to the output file and modify the specified field in the output file :

  ffmpeg -i VID_20130502_220104.avi -metadata creation_time="2013-05-02 22:01:04" -codec copy VID_20130502_220104-2.avi

  Instead, it seems to strip all metadata from the output file. Here is the output of a few commands. I am going nuts. I think this should work, but why is it not ?

  Command to edit the creation time :

  ffmpeg -i VID_20130502_220104.avi -metadata creation_time="2013-05-02 22:01:04" -codec copy VID_20130502_220104-2.avi
  
  
  
  ffmpeg version 3.1.5 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.4.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Guessed Channel Layout for Input Stream #0.1 : mono
  
  Input #0, avi, from 'VID_20130502_220104.avi':
  
    Metadata:
  
      encoder         : 
  
      maker           : NIKON
  
      model           : COOLPIX S4300
  
      creation_time   : 2011-01-01 00:00:00
  
    Duration: 00:01:30.50, start: 0.000000, bitrate: 32135 kb/s
  
      Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 31782 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
  
      Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s
  
  [avi @ 000000000032ad40] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
      Last message repeated 1 times
  
  Output #0, avi, to 'VID_20130502_220104-2.avi':
  
    Metadata:
  
      creation_time   : 2013-05-02 22:01:04
  
      maker           : NIKON
  
      model           : COOLPIX S4300
  
      ISFT            : Lavf57.41.100
  
      Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, q=2-31, 31782 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
  
      Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, mono, 352 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  891 fps=0.0 q=-1.0 size=  116171kB time=00:00:29.69 bitrate=32043.1kbits/s speed=59.4x    
  
  frame= 1739 fps=1739 q=-1.0 size=  227191kB time=00:00:57.96 bitrate=32107.5kbits/s speed=  58x    
  
  frame= 2609 fps=1739 q=-1.0 size=  340940kB time=00:01:26.96 bitrate=32115.9kbits/s speed=  58x    
  
  frame= 2715 fps=1734 q=-1.0 Lsize=  355018kB time=00:01:30.49 bitrate=32136.3kbits/s speed=57.8x    
  
  video:350984kB audio:3897kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.038597%

  Command to inspect the output file metadata with ffmpeg :

  ffmpeg -i VID_20130502_220104-2.avi
  
  
  
  ffmpeg version 3.1.5 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.4.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Guessed Channel Layout for Input Stream #0.1 : mono
  
  Input #0, avi, from 'VID_20130502_220104-2.avi':
  
    Metadata:
  
      encoder         : Lavf57.41.100
  
    Duration: 00:01:30.50, start: 0.000000, bitrate: 32136 kb/s
  
      Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 31782 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
  
      Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s
  
  At least one output file must be specified

  Command to inspect the input file metadata with exiftool :

  exiftool.exe VID_20130502_220104.avi
  
  
  
  ExifTool Version Number         : 10.30
  
  File Name                       : VID_20130502_220104.avi
  
  Directory                       : .
  
  File Size                       : 347 MB
  
  File Modification Date/Time     : 2013:05:13 16:33:52-04:00
  
  File Access Date/Time           : 2015:11:10 23:08:25-05:00
  
  File Creation Date/Time         : 2015:11:10 23:08:25-05:00
  
  File Permissions                : rw-rw-rw-
  
  File Type                       : AVI
  
  File Type Extension             : avi
  
  MIME Type                       : video/x-msvideo
  
  Frame Rate                      : 30
  
  Max Data Rate                   : 488.3 kB/s
  
  Frame Count                     : 2715
  
  Stream Count                    : 2
  
  Stream Type                     : Video
  
  Video Codec                     : mjpg
  
  Video Frame Rate                : 30
  
  Video Frame Count               : 2715
  
  Quality                         : 10000
  
  Sample Size                     : Variable
  
  Image Width                     : 1280
  
  Image Height                    : 720
  
  Planes                          : 1
  
  Bit Depth                       : 24
  
  Compression                     : MJPG
  
  Image Length                    : 2764800
  
  Pixels Per Meter X              : 0
  
  Pixels Per Meter Y              : 0
  
  Num Colors                      : Use BitDepth
  
  Num Important Colors            : All
  
  Audio Codec                     : 
  
  Audio Sample Rate               : 22050
  
  Audio Sample Count              : 1995256
  
  Encoding                        : Microsoft PCM
  
  Num Channels                    : 1
  
  Sample Rate                     : 22050
  
  Avg Bytes Per Sec               : 44100
  
  Bits Per Sample                 : 16
  
  Maker Note Type                 : NIKON
  
  Maker Note Version              : 0.1.0.0
  
  Make                            : NIKON
  
  Model                           : COOLPIX S4300
  
  Software                        : V1.0
  
  Equipment                       : NIKON DIGITAL CAMERA
  
  Orientation                     : Horizontal (normal)
  
  Exposure Time                   : 1/15
  
  F Number                        : 3.5
  
  Exposure Compensation           : 0
  
  Max Aperture Value              : 3.2
  
  Metering Mode                   : Multi-segment
  
  Focal Length                    : 4.6 mm
  
  X Resolution                    : 72
  
  Y Resolution                    : 72
  
  Resolution Unit                 : inches
  
  Date/Time Original              : 2011:01:01 00:00:00
  
  Create Date                     : 2011:01:01 00:00:00
  
  Focus Mode                      : AF-S
  
  Digital Zoom                    : 1
  
  Color Mode                      : COLOR
  
  Sharpness                       : AUTO
  
  White Balance                   : NORMAL
  
  Noise Reduction                 : OFF
  
  Thumbnail Image                 : (Binary data 3082 bytes, use -b option to extract)
  
  Aperture                        : 3.5
  
  Duration                        : 0:01:30
  
  Image Size                      : 1280x720
  
  Megapixels                      : 0.922
  
  Shutter Speed                   : 1/15
  
  Focal Length                    : 4.6 mm

  Command to inspect the output file metadata with exiftool :

  exiftool.exe VID_20130502_220104-2.avi
  
  
  
  ExifTool Version Number         : 10.30
  
  File Name                       : VID_20130502_220104-2.avi
  
  Directory                       : .
  
  File Size                       : 347 MB
  
  File Modification Date/Time     : 2016:11:01 00:17:38-04:00
  
  File Access Date/Time           : 2016:11:01 00:17:36-04:00
  
  File Creation Date/Time         : 2016:11:01 00:15:18-04:00
  
  File Permissions                : rw-rw-rw-
  
  File Type                       : AVI
  
  File Type Extension             : avi
  
  MIME Type                       : video/x-msvideo
  
  Frame Rate                      : 30
  
  Max Data Rate                   : 3923 kB/s
  
  Frame Count                     : 2715
  
  Stream Count                    : 2
  
  Stream Type                     : Video
  
  Video Codec                     : MJPG
  
  Video Frame Rate                : 30
  
  Video Frame Count               : 2715
  
  Quality                         : Default
  
  Sample Size                     : Variable
  
  Image Width                     : 1280
  
  Image Height                    : 720
  
  Planes                          : 1
  
  Bit Depth                       : 24
  
  Compression                     : MJPG
  
  Image Length                    : 2764800
  
  Pixels Per Meter X              : 0
  
  Pixels Per Meter Y              : 0
  
  Num Colors                      : Use BitDepth
  
  Num Important Colors            : All
  
  Audio Codec                     : .
  
  Audio Sample Rate               : 22050
  
  Audio Sample Count              : 1995256
  
  Encoding                        : Microsoft PCM
  
  Num Channels                    : 1
  
  Sample Rate                     : 22050
  
  Avg Bytes Per Sec               : 44100
  
  Bits Per Sample                 : 16
  
  Software                        : Lavf57.41.100
  
  Duration                        : 0:01:30
  
  Image Size                      : 1280x720
  
  Megapixels                      : 0.922

• How to broadcast a stream of Buffered Images to another computer over LAN network by using Java Core

  12 janvier 2017, par Trung Thanh Ngo

  I am working with raspberry pi 3 acting as a server which controls a Sony camera (HX400V model). I am able to use Sony Remote API to control the Pi to extract buffered images in the Sony camera’s liveview stream.

  I want to create and broadcast a stream of those buffered images to another computer over LAN network.

  I succeeded in sending those buffered images by using java socket but there was a delay of 2 seconds which is not good. The Pi acts as a socket client and the other computer acts as a socket server.

  Is there any way to create a stream and broadcast smoothly to another computer by using Java or anything else ?

• Paperclip-ffmpeg not working on Rails

  28 juillet 2013, par Lee7355512727

  I installed Paperclip-ffmpeg and tried to upload a flv file, but it seems there are some problems converting the file.

  I added Paperclip.options[:command_path] = "/usr/bin/" (I got the path by using which ffmpeg) to my config/environments/development.rb file, following the instructions on the paperclip-ffmpeg github page.

  Here is my model subquestion.rb, which contains a paperclip field called qflv :

  class Subquestion < ActiveRecord::Base
  
      belongs_to :question
  
      has_many :qimages , :dependent =>  :destroy
  
  
  
      has_attached_file :qflv, styles: {
  
          medium: {geometry: "640*480", format: 'flv'},
  
          thumb: {geometry: "100*100#", format: 'jpg', time: 10}
  
      }, processors: [:ffmpeg]

  And here is my _subquestion_fields.html.erb file, where users upload videos :

  <%= f.file_field :qflv %>

  _subquestion_fields.html.erb is rendered by question.html.erb file :

  <%= nested_form_for @question, :url => {:action => 'create_question'} do |f| %>
  
         <%= f.fields_for :subquestions do |builder| %>
  
         <%= render 'subquestion_fields', :f => builder %>

  And here is part of the error message :

  WARNING: gnome-keyring:: couldn't connect to: /run/user/li/keyring-CsW4u8/pkcs11: No such file or directory
  
  ffmpeg version 0.8.6-6:0.8.6-1ubuntu2, Copyright (c) 2000-2013 the Libav developers
  
    built on Mar 30 2013 22:23:21 with gcc 4.7.2
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  [flv @ 0x8ba50a0] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, flv, from '/tmp/03000201005171FC8274A20623ECA86B119768-56C7-7A62-DB7A-A4B599F64EE720130727-1837-13757l9.flv':
  
    Metadata:
  
      metadatacreator : modified by youku.com in 20111202
  
      hasKeyframes    : true
  
      hasVideo        : true
  
      hasAudio        : true
  
      hasMetadata     : true
  
    Duration: 00:05:25.03, start: 0.000000, bitrate: N/A
  
      Stream #0.0: Video: h264 (High), yuv420p, 448x336 [PAR 1:1 DAR 4:3], 15 tbr, 1k tbn, 30 tbc
  
      Stream #0.1: Audio: aac, 44100 Hz, stereo, s16
  
  Incorrect frame size
  
  Failed to set value '0x0' for option 's'
  
  WARNING: gnome-keyring:: couldn't connect to: /run/user/li/keyring-CsW4u8/pkcs11: No such file or directory
  
  ffmpeg version 0.8.6-6:0.8.6-1ubuntu2, Copyright (c) 2000-2013 the Libav developers
  
    built on Mar 30 2013 22:23:21 with gcc 4.7.2
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  [flv @ 0x86490a0] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, flv, from '/tmp/03000201005171FC8274A20623ECA86B119768-56C7-7A62-DB7A-A4B599F64EE720130727-1837-13757l9.flv':
  
    Metadata:
  
      metadatacreator : modified by youku.com in 20111202
  
      hasKeyframes    : true
  
      hasVideo        : true
  
      hasAudio        : true
  
      hasMetadata     : true
  
    Duration: 00:05:25.03, start: 0.000000, bitrate: N/A
  
      Stream #0.0: Video: h264 (High), yuv420p, 448x336 [PAR 1:1 DAR 4:3], 15 tbr, 1k tbn, 30 tbc
  
      Stream #0.1: Audio: aac, 44100 Hz, stereo, s16
  
  Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting format 'yuvj420p'
  
  [buffer @ 0x864c180] w:448 h:336 pixfmt:yuv420p
  
  [scale @ 0x8653840] w:448 h:336 fmt:yuv420p -> w:448 h:336 fmt:yuvj420p flags:0x4
  
  [crop @ 0x864dc20] w:448 h:336 -> w:0 h:0
  
  [crop @ 0x864dc20] Invalid too big or non positive size for width '0' or height '0'
  
  Error opening filters!
  
  
  
  
  
  Started POST "/test_geisinger/roots/questions/create" for 127.0.0.1 at 2013-07-27 23:12:31 -0400
  
  Processing by RootsController#create_question as HTML
  
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"EiJk5dBf1nL96BtUiKc0qALCg0Bj9mQ0dx9IodfYdO0=", "question"=>{"explanation"=>"flv", "choice_id"=>"8", "correct_selection_id"=>"32", "quiz_id"=>"10", "subquestions_attributes"=>{"0"=>{"subquestion_type"=>"flv", "_destroy"=>"false", "qflv"=>#x-flv\r\n", @tempfile=#tmp/RackMultipart20130727-1837-1f6g2s0>>}}}, "commit"=>"Submit"}
  
  [paperclip] [ffmpeg] ffmpeg -i "/tmp/03000201005171FC8274A20623ECA86B119768-56C7-7A62-DB7A-A4B599F64EE720130727-1837-13757l9.flv" 2>&1
  
  [paperclip] [ffmpeg] Command Success
  
  [paperclip] [ffmpeg] Making...
  
  [paperclip] [ffmpeg] Building Destination File: '03000201005171FC8274A20623ECA86B119768-56C7-7A62-DB7A-A4B599F64EE720130727-1837-13757l9' + 'flv'
  
  [paperclip] [ffmpeg] Destination File Built
  
  [paperclip] [ffmpeg] Adding Geometry
  
  [paperclip] [ffmpeg] Extracting Target Dimensions
  
  [paperclip] [ffmpeg] Target Size is Available
  
  [paperclip] [ffmpeg] Keeping Aspect Ratio
  
  [paperclip] [ffmpeg] Resize
  
  [paperclip] [ffmpeg] Convert Options: 0x0
  
  [paperclip] [ffmpeg] Adding Format
  
  [paperclip] [ffmpeg] Adding Source
  
  [paperclip] [ffmpeg] Building Parameters
  
  [paperclip] [ffmpeg] -i :source -s 0x0 -y :dest
  
  Command :: ffmpeg -i '/tmp/03000201005171FC8274A20623ECA86B119768-56C7-7A62-DB7A-A4B599F64EE720130727-1837-13757l9.flv' -s 0x0 -y '/tmp/03000201005171FC8274A20623ECA86B119768-56C7-7A62-DB7A-A4B599F64EE720130727-1837-13757l920130727-1837-11o3enh.flv'
  
  [paperclip] An error was received while processing: #tmp/03000201005171FC8274A20623ECA86B119768-56C7-7A62-DB7A-A4B599F64EE720130727-1837-13757l9.flv' -s 0x0 -y '/tmp/03000201005171FC8274A20623ECA86B119768-56C7-7A62-DB7A-A4B599F64EE720130727-1837-13757l920130727-1837-11o3enh.flv'' returned 1. Expected 0

  There might be some problems with pkcs11 so I found this article :

  https://bugzilla.redhat.com/show_bug.cgi?id=783568

  But I could not find /etc/xdg/autostart/gnome-keyring-*.desktop.

  Thank you !