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• I'm having problem encoding video using Laravel FFMPEG to save it to Minio storage

  8 juillet 2022, par Ibrahim Ahmad

  I am trying to convert video from .mp4 extension into HLS format (.m3u8) using Laravel FFMPEG.

  


  FFMpeg::fromDisk('minio')
          ->open($videoFile)
          ->exportForHLS()
          ->onProgress(function ($percentage) use ($movie) {
               Cache::put('progress-' . $movie->id, $percentage);

               if($percentage >= 100) {
                 Cache::forget('progress-' . $movie->id);
                }
             })
             ->toDisk('minio')
             ->addFormat($lowBitrate, function (HLSVideoFilters $filter) {
                 $filter->resize(480, 360);
             })
             ->addFormat($midBitrate, function (HLSVideoFilters $filter) {
                 $filter->resize(852, 480);
              })
              ->addFormat($highBitrate, function (HLSVideoFilters $filter) {
                  $filter->resize(1920, 1080);
              })
              ->save($newFile);


  


  I have a .mp4 video stored in Minio S3 storage, want to export to Minio S3 storage again. And I came up with this error

  


  RecursiveDirectoryIterator::__construct(C:\Windows\Temp/52325dd01cfde90a\): Access is deni (code: 5)


  


  What does the error message say ? But when I export the video file to local, it works totally fine. How do I solve this problem. Thanks.

  


  Update :
The export process requires windows temporary folder, and I cleared the temporary folder, the problem is solved for now. This probably the temporary folder can't hold many files.

  


• How to extract video clip from larger video based on specific time and duration

  26 juillet 2022, par user19019404

  I have video clips that get created. Each video is recorded for 5 minutes and starts at a time e.g. 10:01:20 to 10:06:19 then the next video from 10:06:20 etc. These videos are recorded at a specific frame rate, be it 5 frames or 30 frames (its dependent on the platform making the recording). The net result is NOT a 5 minute video clip but might be a 2 minute video clip (where everyone moves very quickly in the view as a result of the frame rates). I cannot restrict a 1 to 1 recording as these are generated by external systems.

  


  I need to extract specific portions out of the video. For example I need to extract from 10:03:10 to 10:03:35 (25 seconds). This would equate to 10 seconds into the video up to 14 seconds into the video, in those 4 seconds of video, 25 real world seconds are displayed.

  


  My question is do you have any guidance as to how I can calculate that each second of recording actually means 10 or 12 seconds in real life, therefore go to this frame and record to this frame for example.

  


  I have been looking at cv2.CAP_PROP_FPS to get the video frame rates, CAP_PROP_POS_MSEC and CAP_PROP_FRAME_COUNT and believe the answer might lie there, but not sure.

  


  The thinking being if I work out the frame rate of the video, the total frames then I can divide the one by the other to get to how many frames make up real world seconds (this is where I fail). This way I can run from frame to frame as a result.

  


  Thank you

  


• Revision dee5782f93 : Enable encode breakout in real time For real time speed 7, once encode breakout

  28 juin 2014, par Yunqing Wang

  Changed Paths :
   Modify /vp9/encoder/vp9_speed_features.c

  
   Modify /vp9/encoder/vp9_speed_features.h

  
  
  Enable encode breakout in real time

  For real time speed 7, once encode breakout is on(i.e. encoding
  setting —static-thresh=1), a proper encode breakout threshold
  is set to speed up the encoder.

  Set —static-thresh=1, RTC set borg test showed a slight overall
  psnr loss of 0.162%, but ssim gain of 0.287%. The average speedup
  on RTC set is 6%, and for some clips, the speedup can be 10+%.

  Change-Id : Id522d9ce779ff7c699936d13d0c47083de4afb85