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• ffmpeg : Strange behaviour with fade-in and fade-out in conjunction vs successively

  29 novembre 2023, par CEr

  I have a video file I want to fade in and out over a duration of three seconds each.

  


  My code is :

  


  ffmpeg -i video.mp4 -vf "fade=t=in:st=0:d=3,fade=t=out:st=169.288000:d=3" videofaded.mp4

  


  Expected behaviour : Fade from and to black over 3s.
What I get : No fade in at all but a fade out as specified.

  


  If I run ffmpeg -i video.mp4 -vf "fade=t=in:st=0:d=3" -c:a copy fadein.mp4 to juste fade in everything works as expected.

  


  Can anybody help my identify the problem ? I want to fade in and out in the same turn as there are a couple of videos to edit.

  


  Thanks,
Chris

  


  Here is my ffmpeg output :

  


  ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
  configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fffda8a7300] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 1920x1080, 1087 kb/s): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '20231106_Einfuehrung_Word_Mark_Fragen.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:02:52.29, start: 0.016000, bitrate: 1126 kb/s
    Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none, 1920x1080, 1087 kb/s, 16 fps, 16 tbr, 10k tbn, 20k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 72 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
File 'videofaded.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x7fffda8c2c40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x7fffda8c2c40] profile High, level 4.0
[libx264 @ 0x7fffda8c2c40] 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=24 lookahead_threads=4 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=16 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 'videofaded.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080, q=-1--1, 16 fps, 16384 tbn, 16 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 69 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc58.54.100 aac
frame= 2757 fps=273 q=-1.0 Lsize=   21394kB time=00:02:52.28 bitrate=1017.2kbits/s dup=92 drop=0 speed=17.1x
video:19842kB audio:1492kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.280957%
[libx264 @ 0x7fffda8c2c40] frame I:12    Avg QP:15.18  size:232156
[libx264 @ 0x7fffda8c2c40] frame P:1751  Avg QP:20.38  size:  9540
[libx264 @ 0x7fffda8c2c40] frame B:994   Avg QP:23.59  size:   832
[libx264 @ 0x7fffda8c2c40] consecutive B-frames: 40.7% 29.5% 13.1% 16.8%
[libx264 @ 0x7fffda8c2c40] mb I  I16..4: 44.5% 15.6% 39.9%
[libx264 @ 0x7fffda8c2c40] mb P  I16..4:  0.5%  0.2%  0.2%  P16..4:  9.3%  1.1%  1.0%  0.0%  0.0%    skip:87.8%
[libx264 @ 0x7fffda8c2c40] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8:  6.2%  0.2%  0.1%  direct: 0.1%  skip:93.1%  L0:31.0% L1:66.2% BI: 2.9%
[libx264 @ 0x7fffda8c2c40] 8x8 transform intra:20.6% inter:17.2%
[libx264 @ 0x7fffda8c2c40] coded y,uvDC,uvAC intra: 40.5% 40.6% 18.4% inter: 3.2% 2.1% 0.3%
[libx264 @ 0x7fffda8c2c40] i16 v,h,dc,p: 40% 33%  8% 19%
[libx264 @ 0x7fffda8c2c40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 14% 43%  2%  1%  1%  1%  1%  2%
[libx264 @ 0x7fffda8c2c40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 37% 32% 15%  2%  3%  3%  3%  3%  3%
[libx264 @ 0x7fffda8c2c40] i8c dc,h,v,p: 56% 20% 19%  5%
[libx264 @ 0x7fffda8c2c40] Weighted P-Frames: Y:0.7% UV:0.7%
[libx264 @ 0x7fffda8c2c40] ref P L0: 85.4%  5.7%  6.2%  2.7%  0.0%
[libx264 @ 0x7fffda8c2c40] ref B L0: 79.1% 18.3%  2.6%
[libx264 @ 0x7fffda8c2c40] ref B L1: 96.6%  3.4%
[libx264 @ 0x7fffda8c2c40] kb/s:943.30
[aac @ 0x7fffda8f1e00] Qavg: 18927.953


  


• Berlin website owners need consent for using Google Analytics

  19 novembre 2019, par Joselyn Khor — Uncategorized

  Website owners in Berlin need consent for using Google Analytics

  According to the Berlin Data Protection Office, if you’re a website owner collecting and sending data to third-party services (like Google Analytics) who are also using that data “for own purpose uses” in Berlin, you are now required to ask for specific consent from visitors in order to collect that information. 

  This means you can only use Google Analytics or similar services once you’ve gotten consent from visitors. In contrast, Matomo does not use information from Cloud or On-Premise users for “own purpose uses”.

  Consent is also needed when keystrokes or mouse movements are recorded. That means you need users to consent to your usage of features like Heatmaps and Session Recordings.

  It’s advised that website owners in Berlin should check their websites for third-party content and tracking mechanisms. If you do use these third-party functions that require consent, you must either get consent or remove the functions. Consent is only effective if the visitor (whose data you’re collecting) is informed and agrees to their data being processed.

  Currently this applies to website owners in Berlin, and should likely be applied for the whole of Germany to be on the safe side.

  Further reading :

  • Learn more about Matomo’s Cloud Data Processing Agreement
  • Read about asking for consent in Matomo
  • To use Matomo Analytics and be compliant with the regulation we recommend you learn how to make Matomo GDPR compliant in 12 steps.

  And learn more about all the features in our GDPR user guide and privacy user guide. You can also learn more about GDPR through our blog posts.

• Creating a thumbnail from MP4 video crashes on shared hosting but working fine locally

  15 juillet 2019, par Mariam Nagy

  i am working on a web page to upload MP4 video and getting a thumbnail from the video

  i am using NReco FFMpeg Converter to achieve this . it is working fine locally but upload it on a shared hosting it crashes at ffMpeg.GetVideoThumbnail

          string VideoUrl = dataMediaUrl.ImageUrl;
  
          string extension = VideoUrl.Split('.')[VideoUrl.Split('.').Length - 1];
  
          var ffMpeg = new NReco.VideoConverter.FFMpegConverter();
  
          string thumbnailJPEGpath = Server.MapPath(VideoUrl.Replace("~/upload/MediaGallery/", "~/upload/MediaGallery/Thumb_").Replace("." + extension, ".jpg"));
  
          ffMpeg.GetVideoThumbnail(Server.MapPath(VideoUrl), thumbnailJPEGpath);
  
          dataThumbUrl.ImageUrl = VideoUrl.Replace("~/upload/MediaGallery/", "~/upload/MediaGallery/Thumb_").Replace("." + extension, ".jpg");

  This is the error I am getting :

  Server Error in '/' Application.
  
  This program is blocked by group policy. For more information, contact your system administrator
  
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 
  
  
  
  Exception Details: System.ComponentModel.Win32Exception: This program is blocked by group policy. For more information, contact your system administrator
  
  
  
  Source Error: 
  
  
  
  An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
  
  
  
  Stack Trace: 
  
  
  
  
  
  [Win32Exception (0x80004005): This program is blocked by group policy. For more information, contact your system administrator]
  
     System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo) +1889
  
     System.Diagnostics.Process.Start() +119
  
     System.Diagnostics.Process.Start(ProcessStartInfo startInfo) +49
  
     NReco.VideoConverter.FFMpegConverter.ConvertMedia(Media input, Media output, ConvertSettings settings) +1163
  
     NReco.VideoConverter.FFMpegConverter.GetVideoThumbnail(String inputFile, String outputFile, Nullable`1 frameTime) +155
  
     Admin_MediaGalleryVideoUpload.InsertButton_Click(Object sender, EventArgs e) +591
  
     System.Web.UI.WebControls.Button.OnClick(EventArgs e) +9782698
  
     System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +204
  
     System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +12
  
     System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +15
  
     System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35
  
     System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1639
  
  
  
  Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3394.0