Recherche avancée

Sur d’autres sites (4410)

• Evolution #3926 : Remplacement de safehtml par le plug htmlpurifier ou autre

  20 mai 2019

  cam.lafit - a écrit :

  Salut

  Pour note : je viens tomber sur ce script (maintenu) pour nettoyer simplement le html
  http://www.bioinformatics.org/phplabware/internal_utilities/htmLawed/

  Utiliser chez glpi si j’ai bien suivi

  Et plus récent dans sa dernière version que HTMLPurifier (dont la page qui compare les différentes libs ne compare qu’avec une très vieille version).

  Et en plus, ça marche avec composer : http://www.bioinformatics.org/phplabware/internal_utilities/htmLawed/composer_usage.htm

  Par contre, aucune des 2 libs n’est sur un repository affichant des diffs

• Fetching MacroBlock information in FFmpeg

  27 octobre 2019, par Vencat

  I’ve a .mp4 file which contain h.264 video and AAC audio. I wants to extract MacroBlock and motion vector information of each frame while decoding. Please find my below Pseudocode.

  avformat_open_input(file_name) //opening file 
  
  avcodec_open2(pCodecContext, pCodec, NULL) // opening decoder
  
  while (response >= 0) // reading each frame
  
      {
  
          response = avcodec_receive_frame(pCodecContext, pFrame);
  
          if (response == AVERROR(EAGAIN) || response == AVERROR_EOF || response < 0) {
  
              break;
  
          }
  
          // extract macroblock of pFrame here
  
          av_frame_unref(pFrame);
  
      }

  I have seen in other post mentioned that we can get MB information through MpegEncContext structure, but i’m confused were and how to instantiate object of that structure, how the MB data of the structure gets updated for each frame.?

  Ultimately, I wants to compare macroblock from one frame to other frame using SAD (sum of absolute difference) and trigger alerts if there is any distortion in macroblock level.

  I would really appreciate if anyone help on this.

• ffmpeg created timelapse won't play on other players than VLC

  27 février 2019, par theFeiter

  I am creating a Timelapse Video with the following ffmpeg command :

  ffmpeg -r 24 -start_number 7754 -i IMG_%d.JPG -pix_fmt yuv420p -s 1920x1080 Output.mp4

  This works without errors, but when I try to play the .mp4 on my Android Phone it shows an Error : "Unable to play file. Not enough resources"

  With the VLC App : "Currently unable to play this video. Stop the other video and try again"

  When I put the Video through Handbrake It plays fine on all players.

  I tried out changing some ffmpeg options, but nothing helped.

  When I compare the output of ffmpeg -i Output.mp4 from the original with the output from the video out of handbrake it differs only in the video bitrate.

  Are there any other options I can try to change ?

  This is the ffmpeg output :

  ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Input #0, image2, from 'PIC_%d.jpg':
  
    Duration: 00:00:02.24, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 720x1280 [SAR 1:1 DAR 9:16], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 0x56059fe911a0] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 0x56059f9b4180] using SAR=1/1
  
  [libx264 @ 0x56059f9b4180] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x56059f9b4180] profile High, level 3.1
  
  [libx264 @ 0x56059f9b4180] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=-2 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=2 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 'ttyffmpeg.mp4':
  
    Metadata:
  
      encoder         : Lavf57.83.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 720x1280 [SAR 1:1 DAR 9:16], q=-1--1, 2 fps, 16384 tbn, 2 tbc
  
      Metadata:
  
        encoder         : Lavc57.107.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  frame=   56 fps= 11 q=-1.0 Lsize=    5242kB time=00:00:26.50 bitrate=1620.4kbits/s speed=5.38x    
  
  video:5241kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.025511%
  
  [libx264 @ 0x56059f9b4180] frame I:9     Avg QP:14.75  size:111662
  
  [libx264 @ 0x56059f9b4180] frame P:35    Avg QP:17.14  size: 90885
  
  [libx264 @ 0x56059f9b4180] frame B:12    Avg QP:17.74  size: 98312
  
  [libx264 @ 0x56059f9b4180] consecutive B-frames: 62.5% 21.4% 16.1%  0.0%
  
  [libx264 @ 0x56059f9b4180] mb I  I16..4:  2.6% 96.8%  0.6%
  
  [libx264 @ 0x56059f9b4180] mb P  I16..4:  1.0% 93.5%  1.2%  P16..4:  1.6%  1.1%  0.4%  0.0%  0.0%    skip: 1.1%
  
  [libx264 @ 0x56059f9b4180] mb B  I16..4:  0.6% 66.7%  2.1%  B16..8: 10.1% 10.6%  3.0%  direct: 4.8%  skip: 2.0%  L0:35.3% L1:34.6% BI:30.0%
  
  [libx264 @ 0x56059f9b4180] 8x8 transform intra:97.3% inter:91.2%
  
  [libx264 @ 0x56059f9b4180] coded y,uvDC,uvAC intra: 94.3% 79.0% 44.3% inter: 77.2% 76.9% 31.3%
  
  [libx264 @ 0x56059f9b4180] i16 v,h,dc,p: 59% 25% 14%  2%
  
  [libx264 @ 0x56059f9b4180] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 18% 42%  3%  2%  2%  4%  4%  6%
  
  [libx264 @ 0x56059f9b4180] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 27% 10%  3%  5%  5%  8%  5%  7%
  
  [libx264 @ 0x56059f9b4180] i8c dc,h,v,p: 40% 24% 29%  7%
  
  [libx264 @ 0x56059f9b4180] Weighted P-Frames: Y:8.6% UV:5.7%
  
  [libx264 @ 0x56059f9b4180] ref P L0: 67.0% 15.7% 14.0%  3.2%  0.1%
  
  [libx264 @ 0x56059f9b4180] ref B L0: 88.0% 11.4%  0.6%
  
  [libx264 @ 0x56059f9b4180] kb/s:1533.05