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• Revision d869cafc98f8b57a14b8f783738a5234fdeb93a8 : Mauvais contrôle des droits sur le logo d’un mot-clé, bug remontant à la ...

  12 juillet 2010, par Committo,Ergo:sum — Log

  Mauvais contrôle des droits sur le logo d’un mot-clé, bug remontant à la grosse réorganisation de la 2.0 là-dessus [10900] (Stéphane Girault). git-svn-id : svn ://trac.rezo.net/spip/branches/spip-2.0@15826 caf5f3e8-d4fe-0310-bb3e-c32d5e47d55d

• Revision 4d2c376923 : Early termination in encoding partition search In the partition search, the enc

  15 août 2014, par Yunqing Wang

  Changed Paths :
   Modify /vp9/encoder/vp9_context_tree.h

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_rdopt.c

  
   Modify /vp9/encoder/vp9_speed_features.c

  
   Modify /vp9/encoder/vp9_speed_features.h

  
  
  Early termination in encoding partition search

  In the partition search, the encoder checks all possible
  partitionings in the superblock’s partition search tree.
  This patch proposed a set of criteria for partition search
  early termination, which effectively decided whether or
  not to terminate the search in current branch based on the
  "skippable" result of the quantized transform coefficients.
  The "skippable" information was gathered during the
  partition mode search, and no overhead calculations were
  introduced.

  This patch gives significant encoding speed gains without
  sacrificing the quality.

  Borg test results :
  1. At speed 1,
  stdhd set : psnr : +0.074%, ssim : +0.093% ;
  derf set : psnr : -0.024%, ssim : +0.011% ;
  2. At speed 2,
  stdhd set : psnr : +0.033%, ssim : +0.100% ;
  derf set : psnr : -0.062%, ssim : +0.003% ;
  3. At speed 3,
  stdhd set : psnr : +0.060%, ssim : +0.190% ;
  derf set : psnr : -0.064%, ssim : -0.002% ;
  4. At speed 4,
  stdhd set : psnr : +0.070%, ssim : +0.143% ;
  derf set : psnr : -0.104%, ssim : +0.039% ;

  The speedup ranges from several percent to 60+%.
  speed1 speed2 speed3 speed4
  (1080p, 100f) :
  old_town_cross : 48.2% 23.9% 20.8% 16.5%
  park_joy : 11.4% 17.8% 29.4% 18.2%
  pedestrian_area : 10.7% 4.0% 4.2% 2.4%
  (720p, 200f) :
  mobcal : 68.1% 36.3% 34.4% 17.7%
  parkrun : 15.8% 24.2% 37.1% 16.8%
  shields : 45.1% 32.8% 30.1% 9.6%
  (cif, 300f)
  bus : 3.7% 10.4% 14.0% 7.9%
  deadline : 13.6% 14.8% 12.6% 10.9%
  mobile : 5.3% 11.5% 14.7% 10.7%

  Change-Id : I246c38fb952ad762ce5e365711235b605f470a66

• ffmpeg screen blending mode makes transparent png pink

  28 janvier 2014, par gilad s

  I have a sequence of PNG files with transparency - I'd like screen-blend them on top of a video

  ffmpeg -i video.mp4 -i "Images/%03d.png" -filter_complex "blend=all_mode='screen':all_opacity=0.7" output.mp4

  the images are indeed merged on top of the video but with a pink overlay ?!

  I also tried to add "-vcodec png" and "-vcodec libx264" and to try a .mov video but got the same result.

  ffmpeg version N-58061-g5231eec Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Nov 14 2013 05:35:15 with gcc 4.6 (Debian 4.6.3-1)
  
  configuration: --prefix=/root/ffmpeg-static/64bit --extra-cflags='-I/root/ffmpeg- 
  
  static/64bit/include -static' --extra-ldflags='-L/root/ffmpeg-static/64bit/lib -static' 
  
  --extra-libs='-lxml2 -lexpat -lfreetype' --enable-static --disable-shared --disable-
  
  ffserver --disable-doc --enable-bzlib --enable-zlib --enable-postproc --enable-runtime-
  
  cpudetect --enable-libx264 --enable-gpl --enable-libtheora --enable-libvorbis --enable-
  
  libmp3lame --enable-gray --enable-libass --enable-libfreetype --enable-libopenjpeg --
  
  enable-libspeex --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-version3 --
  
  enable-libvpx
  
  libavutil      52. 52.100 / 52. 52.100
  
  libavcodec     55. 41.101 / 55. 41.101
  
  libavformat    55. 21.100 / 55. 21.100
  
  libavdevice    55.  5.100 / 55.  5.100
  
  libavfilter     3. 91.100 /  3. 91.100
  
  libswscale      2.  5.101 /  2.  5.101
  
  libswresample   0. 17.104 /  0. 17.104
  
  libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
  
  Metadata:
  
  major_brand     : isom
  
  minor_version   : 512
  
  compatible_brands: isomiso2avc1mp41
  
  encoder         : Lavf54.2.100
  
  Duration: 00:00:18.88, start: 0.000000, bitrate: 595 kb/s
  
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x480, 461 kb/s,  
  
  25.16 fps, 25 tbr, 1000k tbn, 2000k tbc (default)
  
  Metadata:
  
  handler_name    : VideoHandler
  
  Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s 
  
  (default)
  
  Metadata:
  
  handler_name    : SoundHandler
  
  Input #1, image2, from 'Dots2/%03d.png':
  
  Duration: 00:00:10.00, start: 0.000000, bitrate: N/A
  
  Stream #1:0: Video: png, rgba, 640x480, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  [libx264 @ 0x292ad60] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0x292ad60] profile High, level 3.0
  
  [libx264 @ 0x292ad60] 264 - core 129 r2230 1cffe9f - H.264/MPEG-4 AVC codec - Copyleft 
  
  2003-2012 - 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=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, mp4, to 'output_Dots.mp4':
  
  Metadata:
  
  major_brand     : isom
  
  Stream #0:1(und): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, 
  
  s16, 128 kb/s (default)
  
  Metadata:
  
  handler_name    : SoundHandler
  
  Stream mapping:
  
  Stream #0:0 (h264) -> blend:top (graph 0)
  
  Stream #1:0 (png) -> blend:bottom (graph 0)
  
  blend (graph 0) -> Stream #0:0 (libx264)
  
  Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
  
  Press [q] to stop, [?] for help
  
  frame=  475 fps=105 q=-1.0 Lsize=    1660kB time=00:00:18.92 bitrate= 718.7kbits/s    
  
  video:1349kB audio:295kB subtitle:0 global headers:0kB muxing overhead 0.993598%
  
  [libx264 @ 0x292ad60] frame I:2     Avg QP:19.79  size: 33501
  
  [libx264 @ 0x292ad60] frame P:176   Avg QP:23.16  size:  5651
  
  [libx264 @ 0x292ad60] frame B:297   Avg QP:27.76  size:  1074
  
  [libx264 @ 0x292ad60] consecutive B-frames: 13.3%  8.8%  3.8% 74.1%
  
  [libx264 @ 0x292ad60] mb I  I16..4:  1.7% 69.9% 28.4%
  
  [libx264 @ 0x292ad60] mb P  I16..4:  3.3%  8.1%  1.0%  P16..4: 47.1% 14.7%  7.5%  0.0%  
  
  0.0%    skip:18.3%
  
  [libx264 @ 0x292ad60] mb B  I16..4:  0.1%  0.0%  0.0%  B16..8: 44.4%  2.6%  0.8%  
  
  direct: 0.9%  skip:51.2%  L0:46.0% L1:50.5% BI: 3.5%
  
  [libx264 @ 0x292ad60] 8x8 transform intra:64.9% inter:74.0%
  
  [libx264 @ 0x292ad60] coded y,uvDC,uvAC intra: 47.0% 50.4% 13.1% inter: 11.8% 12.7% 0.5%
  
  [libx264 @ 0x292ad60] i16 v,h,dc,p: 50% 18%  9% 23%
  
  [libx264 @ 0x292ad60] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 15% 22%  4%  6%  6%  7%  5%  5%
  
  [libx264 @ 0x292ad60] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 19% 19%  4%  6%  6%  6%  4%  4%
  
  [libx264 @ 0x292ad60] i8c dc,h,v,p: 55% 17% 25%  2%
  
  [libx264 @ 0x292ad60] Weighted P-Frames: Y:29.0% UV:23.9%
  
  [libx264 @ 0x292ad60] ref P L0: 63.5% 20.9% 13.2%  2.3%  0.2%
  
  [libx264 @ 0x292ad60] ref B L0: 96.8%  2.8%  0.4%
  
  [libx264 @ 0x292ad60] ref B L1: 98.4%  1.6%
  
  [libx264 @ 0x292ad60] kb/s:581.24