Recherche avancée

Sur d’autres sites (3139)

• ffmpeg crashing server working with fpm-php

  1er janvier 2023, par John

  I'm running a wordpress bitnami stack consisting of apache, mariadb and fpm-php.
I have cron jobs fulfilling encoding of one video at a time using ffmpeg, so while fpm-php is serving http requests ffmpeg works in parallel encoding videos.
When encoding starts everything seems to work fine, as shown here :

  


  But eventually after around an hour the server crashes due to lack of memory space. I've read that when CPU can't handle ffmpeg, ffmpeg will start consuming RAM until it exhausts it so that might be what causes the sudden spike in memory usage.

  


  The image bellow illustrates what happens when the server crashes, kswapd0 creates virtual memory out of disk space to cope with lack of memory :


  


  The server has 4vCPU and 8GB RAM. Website traffic is just me and a colleague, so it should be able to handle ffmpeg taking up around 1vCPU to encode videos.

  


  I use the following configuration for fpm-php :

  


  pm=ondemand
pm.max_children=5
pm.start_servers=2
pm.min_spare_servers=1
pm.max_spare_servers=3
pm.max_requests = 500


  


  Has anyone had this issue before ?

  


  Thank you.

  


  I've tried changing around the configuration of fpm-php, but the issue still happens. I don't see how ffpmeg can crash the server when it's taking up about 25% of the CPU only, when there's no traffic to the server.

  


• Can't write .mp4 files - Could not open codec 'libx264' : Unspecified error

  17 février 2015, par margaridagomes

  Days ago I installed the latest 2.4 branch withou ffmpeg. I’m using Ubuntu 14.04 and I don’t have at all ffmpeg in my Virtual Machine.

  I want to write .mp4 video files and the input files are also .mp4. The input codec is avc1.

  I can’t obtain any results, the errors can be seen below.

  Error

  [libx264 @ 0x9357bc0] broken ffmpeg default settings detected
  
  [libx264 @ 0x9357bc0] use an encoding preset (e.g. -vpre medium)
  
  [libx264 @ 0x9357bc0] preset usage: -vpre <speed> -vpre <profile>
  
  [libx264 @ 0x9357bc0] speed presets are listed in x264 --help
  
  [libx264 @ 0x9357bc0] profile is optional; x264 defaults to high
  
  Could not open codec 'libx264': Unspecified error
  
  Could not open the output video for write: /home/margarida/exams_2014/Output.mp4
  
  </profile></speed>

  Simplified Code

  int main(int argc, char *argv[]) {
  
              VideoWriter outputVideo;
  
  
  
              // Get Codec Type
  
              int ex = static_cast<int>(cap.get(CV_CAP_PROP_FOURCC));
  
  
  
              // Transform from int to char via Bitwise operators
  
              char EXT[] = { (char) (ex &amp; 0XFF), (char) ((ex &amp; 0XFF00) >> 8),
  
                              (char) ((ex &amp; 0XFF0000) >> 16), (char) ((ex &amp; 0XFF000000)
  
                                      >> 24), 0 };
  
  
  
              // Acquire input size
  
              Size S = Size((int) cap.get(CV_CAP_PROP_FRAME_WIDTH),
  
                              (int) cap.get(CV_CAP_PROP_FRAME_HEIGHT));
  
  
  
              cout &lt;&lt; "Input codec type: " &lt;&lt; EXT &lt;&lt; endl;
  
  
  
              // Open the output
  
              outputVideo.open(newname, ex, cap.get(CV_CAP_PROP_FPS), S, true);
  
  
  
              if (!outputVideo.isOpened()) {
  
                  cout &lt;&lt; "Could not open the output video for write " &lt;&lt; endl;
  
                          return -1;
  
                      }
  
  
  
                      while (true) {
  
                          cap >> frame;
  
                          if (frame.empty()) {
  
                              cerr &lt;&lt; "nao apanhou frame" &lt;&lt; endl;
  
                              break;
  
                          }
  
  
  
                          cinzento = acinzentar(frame);
  
                          imshow("Cinzento", cinzento);
  
  
  
                          outputVideo.write(cinzento);
  
  
  
                          switch(waitKey(10)){
  
  
  
                          case 27:
  
                              //'esc' has been pressed (ASCII value for 'esc' is 27)
  
                              //exit program.
  
                              return 0;
  
  
  
                          }
  
                      }
  
                     return 0;
  
                  }
  
  </int>

  My cmake was this :

  cmake -D WITH_TBB=ON -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL=ON -D WITH_VTK=ON -D WITH_FFMPEG=OFF -D WITH_IPP=OFF ..

  Can anyone help solving my problem ?

  Thanks in advance.

• How can I crop and encode a video using flutter natively, now that flutter_ffmpeg is discontinued with no alternatives ? [closed]

  13 mars, par Rageh Azzazy

  As of January 6, 2025, FFmpegKit is officially retired (Taner's article).

  


  This also affects the flutter_ffmpeg and ffmpeg_kit_flutter packages.

  


  Most packages for executing video editing commands were built depending on them and so won't work after April 1, 2025 as mentioned in the package documentation and Taner's article. Some packages that depend on flutter_ffmpeg or ffmpeg_kit_flutter are :

  


  

  • video_trimmer

  


  • zero_video_trimmer

  


  • flutter_video_trimmer

  


  • video_trim

  


  • bemeli_compress

  


  • video_trimmer_pro

  


  • ... others

  


  


  Editing video using video_editor or video_editor_2 or video_editor_pits has become a problem.

  


  I believe downloading the binaries and doing the whole thing locally is not just tedious but illegal as well.

  


  I broke down exactly what I need to edit videos in my flutter app and I found those package but have not yet tested them.

  


  


  • ✅ Trimming : flutter_native_video_trimmer

    


  


  • ✅ Compression : video_compress or video_compress_plus

    


  


  • ✅ Muting : video_compress handles this

    


  


  • ❌ Encoding : Not sure, I just need a simple MP4 video files

    


  


  • ❌ Cropping : I can't find a solution for video cropping

    


  


  


  I don't need to rotate, reverse or do any fancy stuff to the videos, just those five functions.

  


  Now the only way forward is to find a simple video cropping function and an encoder that work on flutter IOS & Android

  


  My question is not looking for external library recommendations but :

  


  Do you have any ideas how to crop a video in flutter natively ?