Recherche avancée

Sur d’autres sites (9193)

• avfilter/xbr : refactor alpha blending macros

  16 novembre 2014, par Clément Bœsch

  avfilter/xbr : refactor alpha blending macros
  

  • [DH] libavfilter/vf_xbr.c

• ffmpeg screen blending mode with transparency

  17 novembre 2013, par gilad s

  I have a sequence of PNG files with transparency and a video- video1.mp4

  1. I'd like to convert the PNG files into a video with an alpha channel- video2.mp4

  2. I'd like to merge video2.mp4 with video1.mp4 while the transparent parts in video2 are

  not seen and the other parts are blended using screen blending mode with video1

  when I do :

  ffmpeg -i "%03d.png" -vf scale=640:480 -vcodec libx264 video2.mp4

  a video is created with a black color where the transperent parts are supposed to be (I'm not sure if it's really transparent - I tryied other encoders - all gave the same result).

  afterwards when I do :

  ffmpeg -i video1.mp4 -i video2.mp4 -filter_complex "blend=all_mode='screen'" output.mp4

  the videos are indeed merged but the video has a pink overlay ?!

• 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