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• Error using ffmpeg image2pipe with phantomjs to render video from webpage screenshots

  14 novembre 2016, par user1690179

  I am trying to use phantomjs with ffmpeg to complie videos from screenshots of a webpage as described here :
  https://groups.google.com/forum/# !msg/phantomjs/wluVGGjhL90/oGBXqh7QP44J

  I have the following test.js file :

  var page = require('webpage').create();
  
  
  
  page.clipRect = { top: 0, left: 0, width: 900, height: 800};
  
  page.viewportSize = { width: 900, height: 800};
  
  
  
  var url = 'http://dl.dropbox.com/u/621993/voronoi/voronoi.html';
  
  var frames = 100;
  
  
  
  page.open(url, function(){
  
      setInterval(function(){
  
          page.render('/dev/stdout');
  
  
  
          if( frames == 0 ){
  
              phantom.exit();
  
          }
  
  
  
          frames--;
  
  
  
      }, 100);
  
  });

  Then I run this command, taken from the link above :

  $ phantomjs test.js |ffmpeg -c:v png -f image2pipe -r 10 -sameq -i - -y test.mp4

  Including -sameq causes an error in ffmpeg, so I took it out and ran :

  $ phantomjs test.js |ffmpeg -c:v png -f image2pipe -r 10 -i - -y test.mp4

  I get the following output from ffmpeg :

  ffmpeg version 2.0 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jul 22 2013 09:14:18 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
    configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --arch=x86_64 --enable-runtime-cpudetect
  
    libavutil      52. 38.100 / 52. 38.100
  
    libavcodec     55. 18.102 / 55. 18.102
  
    libavformat    55. 12.100 / 55. 12.100
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 79.101 /  3. 79.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, image2pipe, from 'pipe:':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: png, rgba, 900x800 [SAR 2835:2835 DAR 9:8], 10 fps, 10 tbr, 10 tbn, 10 tbc
  
  No pixel format specified, yuv444p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 0x7f8973803800] using SAR=1/1
  
  [libx264 @ 0x7f8973803800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x7f8973803800] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit
  
  [libx264 @ 0x7f8973803800] 264 - core 133 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=10 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'test.mp4':
  
    Metadata:
  
      encoder         : Lavf55.12.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 900x800 [SAR 1:1 DAR 9:8], q=-1--1, 10240 tbn, 10 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (png -> libx264)
  
  pipe:: Input/output error0 size=      65kB time=00:00:04.10 bitrate= 130.5kbits/s    
  
  frame=   93 fps= 15 q=-1.0 Lsize=      71kB time=00:00:09.10 bitrate=  63.8kbits/s    
  
  video:69kB audio:0kB subtitle:0 global headers:0kB muxing overhead 2.696543%
  
  [libx264 @ 0x7f8973803800] frame I:1     Avg QP:15.17  size: 50212
  
  [libx264 @ 0x7f8973803800] frame P:24    Avg QP: 8.91  size:   575
  
  [libx264 @ 0x7f8973803800] frame B:68    Avg QP: 9.69  size:    87
  
  [libx264 @ 0x7f8973803800] consecutive B-frames:  2.2%  0.0%  3.2% 94.6%
  
  [libx264 @ 0x7f8973803800] mb I  I16..4: 64.2% 19.6% 16.1%
  
  [libx264 @ 0x7f8973803800] mb P  I16..4:  2.8%  0.2%  0.1%  P16..4:  0.5%  0.0%  0.0%  0.0%  0.0%    skip:96.3%
  
  [libx264 @ 0x7f8973803800] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  3.1%  0.0%  0.0%  direct: 0.0%  skip:96.9%  L0:76.4% L1:23.6% BI: 0.0%
  
  [libx264 @ 0x7f8973803800] 8x8 transform intra:13.9% inter:54.0%
  
  [libx264 @ 0x7f8973803800] coded y,u,v intra: 7.4% 4.8% 5.2% inter: 0.1% 0.1% 0.1%
  
  [libx264 @ 0x7f8973803800] i16 v,h,dc,p: 68% 31%  2%  0%
  
  [libx264 @ 0x7f8973803800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 48% 20% 32%  0%  0%  0%  0%  0%  0%
  
  [libx264 @ 0x7f8973803800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 31% 20%  3%  3%  3%  5%  3%  4%
  
  [libx264 @ 0x7f8973803800] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7f8973803800] ref P L0: 91.9%  0.0%  7.4%  0.7%
  
  [libx264 @ 0x7f8973803800] ref B L0: 20.5% 79.5%
  
  [libx264 @ 0x7f8973803800] ref B L1: 99.9%  0.1%
  
  [libx264 @ 0x7f8973803800] kb/s:60.16

  The output test.mp4 file is a blank 10 second video - just a black screen. From what i can tell, I am getting a pipe: : Input/output error from ffmpeg.

  I am pretty new to ffmpeg and I have tried changing some parameters and video codecs in the ffmpeg call, but have not found a solution yet. Can anyone advise ?

• ffmpeg fastest way to convert videos avi to mp4 [migrated]

  5 novembre 2013, par user2938660

  I have server which has :

  • 8x3,4 (sandy bridge cpu)
  • 10gb ram

  i tried different combinations to convert vvideos i mean avi to mp4 but it takes so long :
  - 20mins= 200mb

  maybe there is some ffmpeg command which does this much faster ?

  EDIT WITH ULTRAFAST :

  root@1tb:~/test# ffmpeg -i video.avi -c:v libx264 -preset ultrafast out.mp4
  
  ffmpeg version git-2013-10-28-f1f0b01 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Oct 29 2013 02:05:45 with gcc 4.4.5 (Debian 4.4.5-8)
  
    configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3 --enable-x11grab
  
    libavutil      52. 48.100 / 52. 48.100
  
    libavcodec     55. 39.100 / 55. 39.100
  
    libavformat    55. 19.104 / 55. 19.104
  
    libavdevice    55.  5.100 / 55.  5.100
  
    libavfilter     3. 90.100 /  3. 90.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, avi, from 'video.avi':
  
    Duration: 00:29:00.28, start: 0.000000, bitrate: 1120 kb/s
  
      Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 23.98 tbr, 23.98 tbn, 23.98 tbc
  
      Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16p, 128 kb/s
  
      Metadata:
  
        title           : Hello.Ladies.S01E06.HDTV.XviD-AFG_360p.audio
  
  [libx264 @ 0x2e08e40] using SAR=1/1
  
  [libx264 @ 0x2e08e40] using cpu capabilities: none!
  
  [libx264 @ 0x2e08e40] profile Constrained Baseline, level 3.0
  
  [libx264 @ 0x2e08e40] 264 - core 138 r2358 9e941d1 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=23 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  
  Output #0, mp4, to 'out.mp4':
  
    Metadata:
  
      encoder         : Lavf55.19.104
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, 10000k tbn, 23.98 tbc
  
      Stream #0:1: Audio: aac (libfaac) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
  
      Metadata:
  
        title           : Hello.Ladies.S01E06.HDTV.XviD-AFG_360p.audio
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg4 -> libx264)
  
    Stream #0:1 -> #0:1 (mp3 -> libfaac)
  
  Press [q] to stop, [?] for help
  
  frame=41726 fps=326 q=-1.0 Lsize=  312916kB time=00:29:00.32 bitrate=1473.0kbits/s dup=1 drop=0
  
  video:284876kB audio:27186kB subtitle:0 global headers:0kB muxing overhead 0.273494%
  
  [libx264 @ 0x2e08e40] frame I:167   Avg QP:18.69  size: 30492
  
  [libx264 @ 0x2e08e40] frame P:41559 Avg QP:21.68  size:  6897
  
  [libx264 @ 0x2e08e40] mb I  I16..4: 100.0%  0.0%  0.0%
  
  [libx264 @ 0x2e08e40] mb P  I16..4:  6.3%  0.0%  0.0%  P16..4: 51.2%  0.0%  0.0%  0.0%  0.0%    skip:42.5%
  
  [libx264 @ 0x2e08e40] coded y,uvDC,uvAC intra: 44.9% 54.5% 19.0% inter: 28.1% 20.3% 2.2%
  
  [libx264 @ 0x2e08e40] i16 v,h,dc,p: 43% 23% 21% 13%
  
  [libx264 @ 0x2e08e40] i8c dc,h,v,p: 36% 22% 32% 11%
  
  [libx264 @ 0x2e08e40] kb/s:1340.96
  
  root@1tb:~/test# qt-faststart out.mp4 labas1.mp4
  
  ftyp          0 32
  
  free         32 8
  
  mdat         40 319552104
  
  moov  319552144 873943
  
   patching stco atom...
  
   patching stco atom...
  
   writing ftyp atom...
  
   writing moov atom...
  
   copying rest of file...
  
  root@1tb:~/test#

• Unrecognized option 'preset' with ubuntu 12.04 and ffmpeg

  5 novembre 2013, par hyperrjas

  I have compiled ffmpeg with the guide How To Compile FFmpeg and x264 on Ubuntu.

  Now I'm trying upload a .mp4 file to encode. However I get this error now :

  ffmpeg version git-2013-11-05-934e489 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Nov  5 2013 13:58:43 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-nonfree --enable-version3
  
    libavutil      52. 51.100 / 52. 51.100
  
    libavcodec     55. 41.100 / 55. 41.100
  
    libavformat    55. 21.100 / 55. 21.100
  
    libavdevice    55.  5.100 / 55.  5.100
  
    libavfilter     3. 90.101 /  3. 90.101
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Unrecognized option 'preset'.
  
  Error splitting the argument list: Option not found
  
  
  
  Errors: no output file created.

  This is the ruby methods to encode :

  case format
  
    when 'mp4'
  
     h[:video_codec] = 'libx264'
  
     h[:audio_codec] = 'libfaac'
  
     h[:custom] = '-qscale 0 -preset slow -g 30'
  
    when 'ogv'
  
     h[:video_codec] = 'libtheora'
  
     h[:audio_codec] = 'libvorbis'
  
     h[:custom] = '-b 1500k -ab 160000 -g 30'
  
    when 'webm'
  
     h[:video_codec] = 'libvpx'
  
     h[:audio_codec] = 'libvorbis'
  
     h[:custom] = '-b 1500k -ab 160000 -f webm -g 30'
  
  end