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• Anomalie #2580 : les icones de l’espace privé sont pas belles et trop petites

  7 mars 2012, par Franck Dalot

  Comme il y a écris "pour discussion" dans l’image que tu donnes Fil perso, j’aime bien les couleurs, donc... Pour les boutons, j’aime les boutons "acceuil" et "édition" de Basic L’idée de la clé et du marteau pour "configuration ainsi que les boutons "activité", "squelettes", "maintenance" de COW, (...)

• Unstable video stream after muxing from MKV (H.265) to MP4 using FFmpeg for web playback

  27 juin 2023, par Ryan Blignaut

  I have been encountering an issue while using FFmpeg to mux a video file from MKV format (encoded with H.265) to MP4 format, specifically for web playback. The resulting video stream appears to be unstable and exhibits inconsistencies across different platforms and browsers.

  


  The muxed video works perfectly on Google Chrome, indicating that the MP4 file itself is not the root cause of the issue.

  


  I am aware that Firefox does not support H.265 natively, so it's expected that the video won't play on that browser.

  


  However, I expected the H.265-encoded MP4 video to be compatible with IOS Safari, which has support for H.265 MP4 playback. Surprisingly, the video is missing IOS Safari.

  


  Transcoding the video is not a viable option due to hardware constraints yet I did test this and it seems that then playback works correctly then.

  


  I am using this command to mux with ffmpeg

  


  ffmpeg -i input.mkv -c:v copy -c:a copy output.mp4


  


  This produces the output.mp4

  


  In my html page I include this this video like this

  


      <video src="output.mp4" controls="controls"></video>&#xA;

  


  I have also tried specifying the source explicitly

  


      <video controls="controls">&#xA;        <source src="output.mp4" type="video/mp4">&#xA;    </source></video>&#xA;

  


  I would greatly appreciate any insights or suggestions on how to resolve this issue and ensure stable playback of the H.265-encoded MP4 video on IOS Safari without transcoding .

  


• Installing OpenCV 3.1.0 with CMake on Windows 7, opencv_ffmpeg.dll invalid hash

  21 novembre 2016, par Troppsi

  I’m trying to install OpenCV 3.1.0 with MSVC2015 compiler using CMake. I get an error saying that the file hash is different from the expected hash. I have no access to internet on the PC this needs to be installed on. I tired to install it successfully on a PC with internet to see if I could copy those files to the PC without internet. But that didn’t work as CMake deletes the files, and tries to do it it’s own way. I also tried this solution, but it didn’t work.

  Here is the error message :

  CMake Warning at cmake/OpenCVUtils.cmake:872 (message):
  
    Download: Local copy of opencv_ffmpeg.dll has invalid MD5 hash:
  
    d41d8cd98f00b204e9800998ecf8427e (expected:
  
    89c783eee1c47bfc733f08334ec2e31c)
  
  Call Stack (most recent call first):
  
    3rdparty/ffmpeg/ffmpeg.cmake:10 (ocv_download)
  
    cmake/OpenCVFindLibsVideo.cmake:206 (include)
  
    CMakeLists.txt:536 (include)
  
  
  
  Downloading opencv_ffmpeg.dll...
  
  CMake Error at cmake/OpenCVUtils.cmake:895 (file):
  
    file DOWNLOAD HASH mismatch
  
  
  
      for file: [C:/OpenCV/opencv/sources/3rdparty/ffmpeg/downloads/89c783eee1c47bfc733f08334ec2e31c/opencv_ffmpeg.dll]
  
        expected hash: [89c783eee1c47bfc733f08334ec2e31c]
  
          actual hash: [d41d8cd98f00b204e9800998ecf8427e]
  
               status: [6;"Couldn't resolve host name"]
  
  
  
  Call Stack (most recent call first):
  
    3rdparty/ffmpeg/ffmpeg.cmake:10 (ocv_download)
  
    cmake/OpenCVFindLibsVideo.cmake:206 (include)
  
    CMakeLists.txt:536 (include)
  
  
  
  
  
  CMake Error at cmake/OpenCVUtils.cmake:899 (message):
  
    Failed to download opencv_ffmpeg.dll.  Status=6;"Couldn't resolve host
  
    name"
  
  Call Stack (most recent call first):
  
    3rdparty/ffmpeg/ffmpeg.cmake:10 (ocv_download)
  
    cmake/OpenCVFindLibsVideo.cmake:206 (include)
  
    CMakeLists.txt:536 (include)

  I would like to be able to install this without internet, but it proves very diffucult. Does anyone have any solutions to this ?

  Thanks in advance.