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• Extract Video Frames In Python

  22 avril 2017, par TheNone

  I want to extract video frames and save them as image.

  import os, sys
  
  from PIL import Image
  
  
  
  a, b, c = os.popen3("ffmpeg -i test.avi")
  
  out = c.read()
  
  dp = out.index("Duration: ")
  
  duration = out[dp+10:dp+out[dp:].index(",")]
  
  hh, mm, ss = map(float, duration.split(":"))
  
  total = (hh*60 + mm)*60 + ss
  
  for i in xrange(9):
  
      t = (i + 1) * total / 10
  
      os.system("ffmpeg -i test.avi -ss %0.3fs frame%i.png" % (t, i))

  But I have this error :

  FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
  
  Mac OSX universal build for ffmpegX
  
    configuration:  --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264 
  
    libavutil version: 49.0.0
  
    libavcodec version: 51.9.0
  
    libavformat version: 50.4.0
  
    built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
  
  Input #0, avi, from 'test.avi':
  
    Duration: 00:00:30.5, start: 0.000000, bitrate: 465 kb/s
  
    Stream #0.0, 25.00 fps(r): Video: mpeg4, yuv420p, 640x480
  
    Stream #0.1: Audio: mp3, 32000 Hz, mono, 32 kb/s
  
  Unable for find a suitable output format for 'frame0.png'

  Edit : ffmpeg -formats

  FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
  
  Mac OSX universal build for ffmpegX
  
    configuration:  --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264 
  
    libavutil version: 49.0.0
  
    libavcodec version: 51.9.0
  
    libavformat version: 50.4.0
  
    built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
  
  File formats:
  
    E 3g2             3gp2 format
  
    E 3gp             3gp format
  
   D  4xm             4X Technologies format
  
   D  RoQ             Id RoQ format
  
   D  aac             ADTS AAC
  
   DE ac3             raw ac3
  
    E adts            ADTS AAC
  
   DE aiff            Audio IFF
  
   DE alaw            pcm A law format
  
   DE amr             3gpp amr file format
  
   DE asf             asf format
  
    E asf_stream      asf format
  
   DE au              SUN AU Format
  
   DE avi             avi format
  
   D  avs             avs format
  
    E crc             crc testing format
  
   D  daud            D-Cinema audio format
  
   D  dts             raw dts
  
   DE dv              DV video format
  
    E dvd             MPEG2 PS format (DVD VOB)
  
   D  ea              Electronic Arts Multimedia Format
  
   DE ffm             ffm format
  
   D  film_cpk        Sega FILM/CPK format
  
   D  flic            FLI/FLC/FLX animation format
  
   DE flv             flv format
  
    E framecrc        framecrc testing format
  
   DE gif             GIF Animation
  
   DE h261            raw h261
  
   DE h263            raw h263
  
   DE h264            raw H264 video format
  
   D  idcin           Id CIN format
  
   DE image           image sequence
  
   DE image2          image2 sequence
  
   DE image2pipe      piped image2 sequence
  
   DE imagepipe       piped image sequence
  
   D  ingenient       Ingenient MJPEG
  
   D  ipmovie         Interplay MVE format
  
   DE m4v             raw MPEG4 video format
  
   D  matroska        Matroska file format
  
   DE mjpeg           MJPEG video
  
   D  mm              American Laser Games MM format
  
   DE mmf             mmf format
  
    E mov             mov format
  
   D  mov,mp4,m4a,3gp,3g2,mj2 QuickTime/MPEG4/Motion JPEG 2000 format
  
    E mp2             MPEG audio layer 2
  
   DE mp3             MPEG audio layer 3
  
    E mp4             mp4 format
  
   DE mpeg            MPEG1 System format
  
    E mpeg1video      MPEG video
  
    E mpeg2video      MPEG2 video
  
   DE mpegts          MPEG2 transport stream format
  
   D  mpegvideo       MPEG video
  
    E mpjpeg          Mime multipart JPEG format
  
   DE mulaw           pcm mu law format
  
   D  nsv             NullSoft Video format
  
    E null            null video format
  
   DE nut             nut format
  
   D  nuv             NuppelVideo format
  
   D  ogg             Ogg
  
    E psp             psp mp4 format
  
   D  psxstr          Sony Playstation STR format
  
   DE rawvideo        raw video format
  
   D  redir           Redirector format
  
   DE rm              rm format
  
    E rtp             RTP output format
  
   D  rtsp            RTSP input format
  
   DE s16be           pcm signed 16 bit big endian format
  
   DE s16le           pcm signed 16 bit little endian format
  
   DE s8              pcm signed 8 bit format
  
   D  sdp             SDP
  
   D  shn             raw shorten
  
   D  smk             Smacker Video
  
   D  sol             Sierra SOL Format
  
    E svcd            MPEG2 PS format (VOB)
  
   DE swf             Flash format
  
   D  tta             true-audio
  
   DE u16be           pcm unsigned 16 bit big endian format
  
   DE u16le           pcm unsigned 16 bit little endian format
  
   DE u8              pcm unsigned 8 bit format
  
    E vcd             MPEG1 System format (VCD)
  
   D  vmd             Sierra VMD format
  
    E vob             MPEG2 PS format (VOB)
  
   DE voc             Creative Voice File format
  
   DE wav             wav format
  
   D  wc3movie        Wing Commander III movie format
  
   D  wsaud           Westwood Studios audio format
  
   D  wsvqa           Westwood Studios VQA format
  
   DE yuv4mpegpipe    YUV4MPEG pipe format
  
  
  
  Image formats (filename extensions, if any, follow):
  
   DE gif    gif
  
  
  
  Codecs:
  
   D V    4xm
  
   D V D  8bps
  
   DEA    aac
  
   D V D  aasc
  
   DEA    ac3
  
   DEA    adpcm_4xm
  
   DEA    adpcm_adx
  
   DEA    adpcm_ct
  
   DEA    adpcm_ea
  
   DEA    adpcm_ima_dk3
  
   DEA    adpcm_ima_dk4
  
   DEA    adpcm_ima_qt
  
   DEA    adpcm_ima_smjpeg
  
   DEA    adpcm_ima_wav
  
   DEA    adpcm_ima_ws
  
   DEA    adpcm_ms
  
   DEA    adpcm_sbpro_2
  
   DEA    adpcm_sbpro_3
  
   DEA    adpcm_sbpro_4
  
   DEA    adpcm_swf
  
   DEA    adpcm_xa
  
   DEA    adpcm_yamaha
  
   D A    alac
  
   DEA    amr_nb
  
   DEA    amr_wb
  
   DEV D  asv1
  
   DEV D  asv2
  
   D V D  avs
  
   D V    bmp
  
   D V D  camstudio
  
   D V D  camtasia
  
   D V D  cinepak
  
   D V D  cljr
  
   D A    cook
  
   D V D  cyuv
  
   DES    dvbsub
  
   DES    dvdsub
  
   DEV D  dvvideo
  
   DEV D  ffv1
  
   DEVSD  ffvhuff
  
   D A    flac
  
   D V D  flic
  
   DEVSD  flv
  
   D V D  fraps
  
   DEA    g726
  
   DEV D  h261
  
   DEVSDT h263
  
   D VSD  h263i
  
    EV    h263p
  
   DEV DT h264
  
   DEVSD  huffyuv
  
   D V D  idcinvideo
  
   D V D  indeo2
  
   D V    indeo3
  
   D A    interplay_dpcm
  
   D V D  interplayvideo
  
    EV    jpegls
  
   D V    kmvc
  
    EV    ljpeg
  
   D V D  loco
  
   D A    mace3
  
   D A    mace6
  
   D V D  mdec
  
   DEV D  mjpeg
  
   D V D  mjpegb
  
   D V D  mmvideo
  
   DEA    mp2
  
   DEA    mp3
  
   D A    mp3adu
  
   D A    mp3on4
  
   DEVSDT mpeg1video
  
   DEVSDT mpeg2video
  
   DEVSDT mpeg4
  
   D A    mpeg4aac
  
   D VSDT mpegvideo
  
   DEVSD  msmpeg4
  
   DEVSD  msmpeg4v1
  
   DEVSD  msmpeg4v2
  
   D V D  msrle
  
   D V D  msvideo1
  
   D V D  mszh
  
   D V D  nuv
  
   DEV    pam
  
   DEV    pbm
  
   DEA    pcm_alaw
  
   DEA    pcm_mulaw
  
   DEA    pcm_s16be
  
   DEA    pcm_s16le
  
   DEA    pcm_s24be
  
   DEA    pcm_s24daud
  
   DEA    pcm_s24le
  
   DEA    pcm_s32be
  
   DEA    pcm_s32le
  
   DEA    pcm_s8
  
   DEA    pcm_u16be
  
   DEA    pcm_u16le
  
   DEA    pcm_u24be
  
   DEA    pcm_u24le
  
   DEA    pcm_u32be
  
   DEA    pcm_u32le
  
   DEA    pcm_u8
  
   DEV    pgm
  
   DEV    pgmyuv
  
   DEV    png
  
   DEV    ppm
  
   D A    qdm2
  
   D V D  qdraw
  
   D V D  qpeg
  
   D V D  qtrle
  
   DEV    rawvideo
  
   D A    real_144
  
   D A    real_288
  
   D A    roq_dpcm
  
   D V D  roqvideo
  
   D V D  rpza
  
   DEV D  rv10
  
   DEV D  rv20
  
   D A    shorten
  
   D A    smackaud
  
   D V    smackvid
  
   D V D  smc
  
   DEV    snow
  
   D A    sol_dpcm
  
   DEA    sonic
  
    EA    sonicls
  
   D V D  sp5x
  
   DEV D  svq1
  
   D VSD  svq3
  
   D V    theora
  
   D V D  truemotion1
  
   D V D  truemotion2
  
   D A    truespeech
  
   D A    tta
  
   D V D  ultimotion
  
   D V    vc9
  
   D V D  vcr1
  
   D A    vmdaudio
  
   D V D  vmdvideo
  
   D A    vorbis
  
   D V    vp3
  
   D V D  vqavideo
  
   D A    wmav1
  
   D A    wmav2
  
   DEVSD  wmv1
  
   DEVSD  wmv2
  
   D V D  wnv1
  
   D A    ws_snd1
  
   D A    xan_dpcm
  
   D V D  xan_wc3
  
   D V D  xl
  
    EV    xvid
  
   DEV D  zlib
  
   D V    zmbv
  
  
  
  Supported file protocols:
  
   file: pipe: udp: rtp: tcp: http:
  
  Frame size, frame rate abbreviations:
  
   ntsc pal qntsc qpal sntsc spal film ntsc-film sqcif qcif cif 4cif
  
  Motion estimation methods:
  
   zero(fastest) full(slowest) log phods epzs(default) x1 hex umh iter
  
  
  
  Note, the names of encoders and decoders dont always match, so there are
  
  several cases where the above table shows encoder only or decoder only entries
  
  even though both encoding and decoding are supported for example, the h263
  
  decoder corresponds to the h263 and h263p encoders, for file formats its even
  
  worse

  What is wrong in my code ? Thanks in advance

• FFMPEG - Scale video filter not providing expected results

  11 novembre 2011, par dpassera

  Apologies if this question has been asked. I couldn't find it, but if it has, please let me know and I'll close this out.

  I'm attempting a simple scale of a video whose original dimensions are 480x360 and whose target dimensions are 400x300. The video starts as an FLV and eventually needs to end up as an MPEG. I'm using the following command line to do this :

  ffmpeg -i user.flv -vf "scale=400:300" user_scaled.mpg

  When I play the scaled video in MPEG Streamclip, the scale is correct and the video info shows that the dimensions are 400x300. However, when I play the scaled video in Quicktime, the video is scaled to 478x359. More importantly, FFMPEG, itself, treats the video as being 478x359, so any future commands (trimming, conversion, overlaying, etc) executed on it result in a video of 478x359.

  The initial workflow required an FLV to MPEG conversion, but I've tried this with several different in and out formats (FLV -> FLV, FLV -> MPEG, MPEG -> MPEG, etc) all with the same results. As long as I can end up with an MPEG, though, I can deal with however many steps and conversions it would take to get this scaling working.

  I'll paste the command-line output below, and a sample input video is also linked below, if you'd like it. Thank you very much for any help.

  http://www.monkeydriver.com/dpassera/stack_flv.zip

  Command-line output :

  ffmpeg -i user.flv -vf "scale=400:300" user_scaled.mpg
  
  
  
  ffmpeg version 0.7-rc1, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on May 21 2011 22:13:19 with gcc 4.1.2 20080704 (Red Hat 4.1.2-50)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 
  
   --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth
  
   --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
  
   -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC'
  
   --enable-avfilter --enable-libdirac --enable-libgsm --enable-libmp3lame
  
   --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264
  
   --enable-gpl --enable-postproc --enable-pthreads --enable-shared
  
   --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
  
   --disable-yasm --enable-filters --enable-filter=movie
  
  
  
    libavutil    50. 40. 1 / 50. 40. 1
  
    libavcodec   52.120. 0 / 52.120. 0
  
    libavformat  52.108. 0 / 52.108. 0
  
    libavdevice  52.  4. 0 / 52.  4. 0
  
    libavfilter   1. 77. 0 /  1. 77. 0
  
    libswscale    0. 13. 0 /  0. 13. 0
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  
  
  [flv @ 0x11dd3b30] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, flv, from 'user.flv':
  
  
  
    Metadata:
  
      duration        : 5
  
      videocodecid    : 2
  
      audiocodecid    : 6
  
      canSeekToEnd    : true
  
      createdby       : FMS 4.0
  
      creationdate    : Mon Oct 31 11:43:44 2011
  
  
  
    Duration: 00:00:04.62, start: 0.000000, bitrate: N/A
  
      Stream #0.0: Video: flv, yuv420p, 640x480, 1k tbr, 1k tbn, 1k tbc
  
      Stream #0.1: Audio: nellymoser, 44100 Hz, mono, s16
  
  
  
  [buffer @ 0x11ddc950] w:640 h:480 pixfmt:yuv420p
  
  
  
  [scale @ 0x11dda610] w:640 h:480 fmt:yuv420p -> w:400 h:300 fmt:yuv420p flags:0xa0000004
  
  
  
  [mpeg @ 0x11dd6bd0] VBV buffer size not set, muxing may fail
  
  
  
  Output #0, mpeg, to 'user_scaled.mpg':
  
    Metadata:
  
      duration        : 5
  
      videocodecid    : 2
  
      audiocodecid    : 6
  
      canSeekToEnd    : true
  
      createdby       : FMS 4.0
  
      creationdate    : Mon Oct 31 11:43:44 2011
  
      encoder         : Lavf52.108.0
  
  
  
      Stream #0.0: Video: mpeg1video, yuv420p, 400x300, q=2-31, 200 kb/s, 90k tbn, 60 tbc
  
  
  
      Stream #0.1: Audio: mp2, 44100 Hz, mono, s16, 64 kb/s
  
  
  
  Stream mapping:
  
  Stream #0.0 -> #0.0
  
  Stream #0.1 -> #0.1
  
  
  
  Press [q] to stop encoding
  
  frame=  230 fps=  0 q=10.2 size=     366kB time=3.82 bitrate= 785.6kbits/s dup=175 drop=0 
  
  frame=  267 fps=  0 q=10.7 Lsize=     412kB time=4.43 bitrate= 761.3kbits/s dup=203 drop=0    
  
  
  
  video:370kB audio:36kB global headers:0kB muxing overhead 1.568959%

• Rails 3 : How can I make Paperclip-FFMPEG work ?

  9 novembre 2011, par remino

  I have Rails 3.0.3 with these gems :

  • delayed_job 2.1.4
  • delayed_paperclip 0.7.1
  • paperclip 2.3.16
  • paperclip-ffmpeg 0.7.0

  (This combination is very specific. Some newer gems will not work with others.)

  Here's my Video model :

  class Video < Upload
  
    has_attached_file :file, :default_style => :view, :processors => [:ffmpeg],
  
      :url => '/system/:class/:attachment/:id/:style/:basename.:extension',
  
      :path => ':rails_root/public/system/:class/:attachment/:id/:style' \
  
        + '/:basename.:extension',
  
      :default_url => '/images/en/processing.png',
  
      :styles => {
  
        :mp4video => { :geometry => '520x390', :format => 'mp4',
  
          :convert_options => { :output => { :vcodec => 'libx264',
  
            :vpre => 'ipod640', :b => '250k', :bt => '50k',
  
            :acodec => 'libfaac', :ab => '56k', :ac => 2 } } },
  
        :oggvideo => { :geometry => '520x390', :format => 'ogg',
  
          :convert_options => { :output => { :vcodec => 'libtheora',
  
            :b => '250k', :bt => '50k', :acodec => 'libvorbis',
  
            :ab => '56k', :ac => 2 } } },
  
        :view => { :geometry => '520x390', :format => 'jpg', :time => 1 },
  
        :preview => { :geometry => '160x120', :format => 'jpg', :time => 1 }
  
      }
  
    validates_attachment_content_type :file, :content_type => VIDEOTYPES,
  
      :if => Proc.new { |upload| upload.file.file? }
  
    process_in_background :file
  
  end

  When creating a new Video object with attachment, the original is saved, but no conversion will be done. Even calling Video.last.file.reprocess! won't to a thing except returning true. (Not sure what "true" means in this case as it didn't work.)

  I tried hardcoding the path to ffmpeg in Paperclip::options[:command_path]. I even tried deleting the paperclip-ffmpeg.rb file and replacing it with a blank file. Really thinking I'd get an exception by doing the later, instead, I simply got "true" again.

  It feels like the paperclip-ffmpeg.rb is being loaded, because it is required by config/application.rb, but nothing is called in it when trying to generate a thumbnail or convert a video.

  Can anyone help me with this ? Thanks in advance !