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• FFmpeg using png with tranparency and exclusion blending mode

  27 août 2016, par moorej

  I’m trying to use the exclusion blending mode to blend together a video and a png with transparency. I’ve looked around quite a bit but I can’t find a solution that works for me. Here’s the ffmpeg command :

  ffmpeg -i movie.mkv -i text_white_bg_trans.png -filter_complex\
  
    "[1:v]setsar=sar=1,format=rgba[txt]; [0:v]format=rgba[mo]; [mo][txt]blend=all_mode='exclusion'"  out_exclusion.mkv

  Edit : and the console output :

  ffmpeg version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex --enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-indev=jack --disable-outdev=xv --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --enable-vda --enable-videotoolbox --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, matroska,webm, from 'movie.mkv':
  
    Metadata:
  
      ENCODER         : Lavf57.25.100
  
    Duration: 00:00:11.88, start: 0.000000, bitrate: 5143 kb/s
  
      Stream #0:0: Video: h264 (High), yuv420p, 1640x1232, SAR 1:1 DAR 205:154, 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
  
      Metadata:
  
        ENCODER         : Lavc57.24.102 libx264
  
        DURATION        : 00:00:11.880000000
  
  Input #1, png_pipe, from 'text_white_bg_trans.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #1:0: Video: png, rgba(pc), 1640x1232, 25 tbr, 25 tbn, 25 tbc
  
  File 'out_exclusion.mkv' 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.
  
  [libx264 @ 0x7fb10a01e200] using SAR=1/1
  
  [libx264 @ 0x7fb10a01e200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x7fb10a01e200] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
  
  [libx264 @ 0x7fb10a01e200] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=12 lookahead_threads=2 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=25 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, matroska, to 'out_exclusion.mkv':
  
    Metadata:
  
      encoder         : Lavf57.25.100
  
      Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p, 1640x1232 [SAR 1:1 DAR 205:154], q=-1--1, 25 fps, 1k tbn, 25 tbc (default)
  
      Metadata:
  
        encoder         : Lavc57.24.102 libx264
  
      Side data:
  
        unknown side data type 10 (24 bytes)
  
  Stream mapping:
  
    Stream #0:0 (h264) -> format
  
    Stream #1:0 (png) -> setsar
  
    blend -> Stream #0:0 (libx264)
  
  Press [q] to stop, [?] for help
  
  frame=   24 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=  frame=   47 fps= 40 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=  frame=   61 fps= 36 q=28.0 size=      96kB time=00:00:00.12 bitrate=6567.3kbitsframe=   70 fps= 32 q=28.0 size=     264kB time=00:00:00.48 bitrate=4513.9kbitsframe=   83 fps= 30 q=28.0 size=     498kB time=00:00:01.00 bitrate=4079.5kbitsframe=   95 fps= 29 q=28.0 size=     691kB time=00:00:01.48 bitrate=3827.5kbitsframe=  106 fps= 28 q=28.0 size=     896kB time=00:00:01.92 bitrate=3823.7kbitsframe=  118 fps= 27 q=28.0 size=    1132kB time=00:00:02.40 bitrate=3863.7kbitsframe=  130 fps= 26 q=28.0 size=    1338kB time=00:00:02.88 bitrate=3806.1kbitsframe=  142 fps= 26 q=28.0 size=    1588kB time=00:00:03.36 bitrate=3871.7kbitsframe=  154 fps= 25 q=28.0 size=    1808kB time=00:00:03.84 bitrate=3856.9kbitsframe=  166 fps= 25 q=28.0 size=    2062kB time=00:00:04.32 bitrate=3910.9kbitsframe=  178 fps= 24 q=28.0 size=    2328kB time=00:00:04.80 bitrate=3972.8kbitsframe=  190 fps= 24 q=28.0 size=    2620kB time=00:00:05.28 bitrate=4064.7kbitsframe=  203 fps= 24 q=28.0 size=    2886kB time=00:00:05.80 bitrate=4076.0kbitsframe=  215 fps= 24 q=28.0 size=    3132kB time=00:00:06.28 bitrate=4085.9kbitsframe=  226 fps= 24 q=28.0 size=    3357kB time=00:00:06.72 bitrate=4092.5kbitsframe=  238 fps= 24 q=28.0 size=    3589kB time=00:00:07.20 bitrate=4083.9kbitsframe=  250 fps= 23 q=28.0 size=    3794kB time=00:00:07.68 bitrate=4047.3kbitsframe=  260 fps= 23 q=28.0 size=    3978kB time=00:00:08.08 bitrate=4032.7kbitsframe=  272 fps= 23 q=28.0 size=    4212kB time=00:00:08.56 bitrate=4031.0kbitsframe=  284 fps= 23 q=28.0 size=    4453kB time=00:00:09.04 bitrate=4035.3kbitsframe=  295 fps= 23 q=28.0 size=    4632kB time=00:00:09.48 bitrate=4002.9kbitsframe=  297 fps= 20 q=-1.0 Lsize=    5559kB time=00:00:11.80 bitrate=3859.4kbits/s speed=0.808x    
  
  video:5556kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.053747%
  
  [libx264 @ 0x7fb10a01e200] frame I:2     Avg QP:21.70  size: 56001
  
  [libx264 @ 0x7fb10a01e200] frame P:178   Avg QP:23.12  size: 24833
  
  [libx264 @ 0x7fb10a01e200] frame B:117   Avg QP:25.78  size:  9886
  
  [libx264 @ 0x7fb10a01e200] consecutive B-frames: 29.3% 49.8% 14.1%  6.7%
  
  [libx264 @ 0x7fb10a01e200] mb I  I16..4:  9.5% 75.0% 15.5%
  
  [libx264 @ 0x7fb10a01e200] mb P  I16..4:  4.0% 14.8%  1.0%  P16..4: 43.3% 12.0%  4.5%  0.0%  0.0%    skip:20.4%
  
  [libx264 @ 0x7fb10a01e200] mb B  I16..4:  0.6%  1.9%  0.1%  B16..8: 48.5%  4.2%  0.3%  direct: 0.6%  skip:43.8%  L0:42.5% L1:55.6% BI: 1.9%
  
  [libx264 @ 0x7fb10a01e200] 8x8 transform intra:74.8% inter:85.5%
  
  [libx264 @ 0x7fb10a01e200] coded y,u,v intra: 31.3% 0.0% 0.0% inter: 15.0% 0.0% 0.0%
  
  [libx264 @ 0x7fb10a01e200] i16 v,h,dc,p: 30% 32% 13% 25%
  
  [libx264 @ 0x7fb10a01e200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 22% 32%  3%  4%  3%  6%  3%  3%
  
  [libx264 @ 0x7fb10a01e200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 33% 16%  3%  4%  3%  9%  4%  2%
  
  [libx264 @ 0x7fb10a01e200] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7fb10a01e200] ref P L0: 72.2% 17.9%  7.5%  2.5%
  
  [libx264 @ 0x7fb10a01e200] ref B L0: 90.9%  8.6%  0.5%
  
  [libx264 @ 0x7fb10a01e200] ref B L1: 98.6%  1.4%
  
  [libx264 @ 0x7fb10a01e200] kb/s:3830.94

  Edit : Here’s a frame from the output.
  
  The output video is B&W rather than the original color (not sure why). The rectangle in the image is located where there is a block of text on a png with a transparent background. The png is the same size as the video.

  I’m expecting something more like this :
  

  @Mulvya suggestion fixed the issue with color but I’m still seeing some problems with transparency being handled. I’m attaching a few different images below that each create different problems. All created in Photoshop CC (therein may lie the problem).

  A transparent background with a separate text layer that is then exported by Save->png, Photoshop appears to merge these two layers but differently than when "merge layers" is chosen before export. The exported image looks like the B&W image I posted above but with color.

  The in the second I merge the layers before exporting. It appears the entire image is treated as white.

  In the third I draw "hello" on a transparent layer with a "soft" brush using different grays then export. Transparent areas are rendered as white, gray or translucent areas opaque or with a strange dithering "effect."

  It seems I’m moving outside the realm of StackOverflow, but I’m not sure where this post would be better suited.
  1
  
  2
  
  3
  

• ffmpeg fails to copy correct duration

  2 février 2016, par guneykayim

  I want to trim a video with the following command :

  ffmpeg.exe -i in.mp4 -ss 76 -t 10 -c copy -an out.mp4

  which exactly means, copy 10 seconds after 76 seconds, and don’t copy audio. However out.mp4 is 5 seconds length.

  This is ffmpeg console output :

  ffmpeg.exe -i in.mp4 -ss 76 -t 10 -c copy -an out.mp4
  
  ffmpeg version N-78197-g5893e87 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzli
  
  b --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libblu
  
  ray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab
  
  le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger
  
   --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena
  
  ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --en
  
  able-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --
  
  enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55. 16.101 / 55. 16.101
  
    libavcodec     57. 22.102 / 57. 22.102
  
    libavformat    57. 23.101 / 57. 23.101
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 27.100 /  6. 27.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf54.63.104
  
    Duration: 00:02:28.54, start: 0.000000, bitrate: 2018 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1056 [SAR 1:1 DAR 20:11]
  
  , 1887 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default
  
  )
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Output #0, mp4, to 'out.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.23.101
  
      Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1056 [SAR 1:1 DAR 20:11],
  
  q=2-31, 1887 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 90k tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  143 fps=0.0 q=-1.0 Lsize=    1502kB time=00:00:09.96 bitrate=1235.5kbits/s speed= 524x
  
  video:1499kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.194616%

  When I analyze this console output I see this inconsistency. It says output time is 9.96 seconds. On the other hand it says frame is 143, so from the latter information I can calculate duration by frame/fps which is 143/23.98=5.96.

  Another strange behaviour with this copy command is when I change the start time to something else output video length is varying between 5-10 seconds depending on the start time.

  What might be the problem causing these unexpected behaviours ?

• Anomalie #3697 (Fermé) : Bug svn10000 SPIP 3

  14 février 2016, par MiKaël Navarro

  Bonjour,

  Je suis tombé sur un bug sur le processus de mise-à-jour de la base lors d’une migration vers SPIP3.

  En effet lorsque un dossier n’est pas présent (comme dans le cas d’une installation fraiche de SPIP 3.1 à partir du fichier Zip) on obtient des erreurs PHP qui remplissent les logs du serveur Web (dans mon cas Nginx) et saturent le disque.

  D’après la doc http://php.net/manual/fr/function.opendir.php, la fonction opendir renvoie False en cas de soucis et non une ressource. Il faut soit ignorer ce warning soit contrôler préalablement que le dossier existe :

  
  
  — - spip-3.1/ecrire/maj/svn10000.php    2016-01-06 17:34:04.000000000 +0100
  +++ spip3/ecrire/maj/svn10000.php       2016-02-12 15:44:04.952961945 +0100
  @@ -674,8 +674,9 @@
   function ranger_cache_gd2() 
          spip_log("ranger_cache_gd2") ;
          $base = _DIR_VAR . "cache-gd2/" ;
  
   $dir = opendir($base) ;
  
   while (($f = readdir($dir)) !== false) 
  +       if (is_dir($base)) 
  +         if ($dir = opendir($base)) 
  +           while (($f = readdir($dir)) !== false) 
                  if (!is_dir($base . $f) and strncmp($f, ".", 1) !== 0
                          and preg_match(",[0-9a-f]32\.\w+,", $f)
                  ) 
  @@ -687,6 +688,8 @@
                  if (time() >= _TIME_OUT) 
                          return ;
                  
  +           
  +         
          
   
  
  

  
  Cdt,
  —
  A+, MiKaël.
  http://www.klnavarro.fr