Recherche avancée

Sur d’autres sites (12833)

• I cannot find bin folder fmpeg when downloading from official site

  13 janvier 2017, par Moudiz

  I want to run and use ffmpeg I download it from this site https://ffmpeg.org/

  and I coudlnt find bin folder as in the tutorials they mentioned i need bin to execute the command

  

  but if i download from site https://ffmpeg.zeranoe.com/builds/ i find bin folder , so what is the difference between the 2 ?

  

• FFmpeg compose, multi layers and filters

  10 octobre 2019, par jadeshohy

  Pretty new to FFmpeg. We would like to use FFmpeg as a important part of an AR project.

  Currently, we find it is not easy for us.

  We want to compose the footages with FFmpeg.

  We got 5 layers, wanted to blend them with specific mode, like the things in After Effects.

  • layer-1/ [A.webm] video，vp9 codec, which has a transparent BG,has to be added as [normal mode]

  • layer-2/ [B.mp4] video, optical-flare things with black BG,has to be added as [screen mode]

  • layer-3/ [C.mp4] video, some motion graphic things with light BG,has to be added as [overlay mode]

  • layer-4/ [BG.MP4], backgound things, has to be added as [normal mode]

  After we blend those 4 (like pre-compose,use blend filter), we want to add another layer-5/[icon.png] which is the special icon.

  Layer-5 need to overlay the pre-compose. We have to overlay it at the special position (use overlay filter ?).

  Cause [icon.png] may change frequently. we want to deal with that after the 4 layer blending.

  But at the first step, when we set normal mode for layer-1 in blend filter, layer-1 [A.webm] lost the transparent BG，it gave us a black BG which block all other things.
  Blend filter can not handle the alpha channel of vp9 webm ?
  When we set the mode of layer-1 to screen mode,the translucent thing was not what we need.

  Could you please give us some commands to achieve the blend above ?

  The commands that really work will be extremely useful for our FFmpeg initiation.

  ffmpeg -c:v libvpx-vp9 -i transparent.webm -i bg.mp4 -filter_complex "[0:v]format=yuva420p [a]; [1:v]format=yuv420p [b]; [a][b]blend=all_mode='normal':shortest=1:all_opacity=1,format=yuv420p" output.mp4 >log
  
  ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.4_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  [libvpx-vp9 @ 0x7f8876008600] v1.8.0
  
      Last message repeated 1 times
  
  Input #0, matroska,webm, from 'transparent.webm':
  
    Metadata:
  
      encoder         : Chrome
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0(eng): Video: vp9 (Profile 0), yuva420p(tv), 640x360, SAR 1:1 DAR 16:9, 60 fps, 60 tbr, 1k tbn, 1k tbc (default)
  
      Metadata:
  
        alpha_mode      : 1
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'bg.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.83.100
  
    Duration: 00:00:04.00, start: 0.000000, bitrate: 728 kb/s
  
      Stream #1:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360, 725 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  [libvpx-vp9 @ 0x7f8877806600] v1.8.0
  
  Stream mapping:
  
    Stream #0:0 (libvpx-vp9) -> format
  
    Stream #1:0 (h264) -> format
  
    format -> Stream #0:0 (libx264)
  
  Press [q] to stop, [?] for help
  
  [libvpx-vp9 @ 0x7f8877806600] v1.8.0
  
  [libx264 @ 0x7f8877817200] using SAR=1/1
  
  [libx264 @ 0x7f8877817200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x7f8877817200] profile High, level 3.1
  
  [libx264 @ 0x7f8877817200] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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.mp4':
  
    Metadata:
  
      encoder         : Lavf58.20.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, 60 fps, 15360 tbn, 60 tbc (default)
  
      Metadata:
  
        encoder         : Lavc58.35.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  frame=  239 fps=113 q=-1.0 Lsize=     232kB time=00:00:03.93 bitrate= 482.5kbits/s dup=1 drop=2 speed=1.86x
  
  video:228kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.586669%
  
  [libx264 @ 0x7f8877817200] frame I:1     Avg QP:20.55  size:  5385
  
  [libx264 @ 0x7f8877817200] frame P:62    Avg QP:24.42  size:  2373
  
  [libx264 @ 0x7f8877817200] frame B:176   Avg QP:31.31  size:   456
  
  [libx264 @ 0x7f8877817200] consecutive B-frames:  1.3%  0.8%  2.5% 95.4%
  
  [libx264 @ 0x7f8877817200] mb I  I16..4: 18.6% 68.4% 13.0%
  
  [libx264 @ 0x7f8877817200] mb P  I16..4:  1.6%  4.0%  0.7%  P16..4: 14.8%  7.0%  4.5%  0.0%  0.0%    skip:67.5%
  
  [libx264 @ 0x7f8877817200] mb B  I16..4:  0.2%  0.0%  0.0%  B16..8: 17.4%  2.5%  0.4%  direct: 0.5%  skip:78.9%  L0:53.1% L1:40.4% BI: 6.6%
  
  [libx264 @ 0x7f8877817200] 8x8 transform intra:60.1% inter:60.4%
  
  [libx264 @ 0x7f8877817200] coded y,uvDC,uvAC intra: 16.6% 27.4% 10.7% inter: 3.0% 2.2% 0.1%
  
  [libx264 @ 0x7f8877817200] i16 v,h,dc,p: 56% 37%  6%  2%
  
  [libx264 @ 0x7f8877817200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 40%  6% 48%  1%  1%  1%  1%  1%  1%
  
  [libx264 @ 0x7f8877817200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 22% 23%  3%  3%  4%  3%  4%  3%
  
  [libx264 @ 0x7f8877817200] i8c dc,h,v,p: 57% 20% 21%  2%
  
  [libx264 @ 0x7f8877817200] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7f8877817200] ref P L0: 69.3% 12.8% 13.6%  4.3%
  
  [libx264 @ 0x7f8877817200] ref B L0: 92.9%  5.9%  1.1%
  
  [libx264 @ 0x7f8877817200] ref B L1: 96.1%  3.9%
  
  [libx264 @ 0x7f8877817200] kb/s:467.59

• Issues implementing video Steganography using C# and ffmpeg [closed]

  25 juin 2012, par RAZER

  I'm trying to implement video steganography using c# and ffmpeg.
  The logic is as follows :

  -get bitmap frames from a video using ffmpeg argument
  (" -i d :\video.avi -r 25 d :\images\image-%5d.bmp")

  -hide data within lsb of bitmap data, starting from the first frames.

  -get video from the encode bitmap frames using ffmpeg argument
  (" -r 25 -i d :\images\image-%5d.bmp d :\out.avi")

  -now to decode hidden data, again get bitmap frames from above created video and perform decoding by
  extracting data from lsb of bitmap data.

  But the problem is the last step i cannot get the exact data that was hidden.
  I don't know what's go'in on, can anybody help me with the issue.