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• array_merge() : Argument #2 is not an array after adding class into providers

  19 juin 2019, par Daman Mokha

  I am using pbmedia/laravel-ffmpeg as soon as I installed and added the providers and alias, it shows me the following error. This code was simply working on another machine

  array_merge(): Argument #2 is not an array

  I have tried the following things

  1. Composer update/ and Fresh install
  2. Cleaning the bootstrap/cache/
  3. Checked the config file for laravel-ffmpeg it’s there and fine
  4. Publish the config file using the artisan CLI tool : php artisan vendor:publish —provider="Pbmedia\LaravelFFMpeg\FFMpegServiceProvider"

  Here is the portion from laravel.log when I tried to run.

  [2019-06-19 00:34:40] local.ERROR: ErrorException: array_merge(): Argument #2 is not an array in /Users/damanmokha/edetyv2/vendor/laravel/framework/src/Illuminate/Support/ServiceProvider.php:59
  
  Stack trace:
  
  #0 [internal function]: Illuminate\Foundation\Bootstrap\HandleExceptions->handleError(2, 'array_merge(): ...', '/Users/damanmok...', 59, Array)
  
  #1 /Users/damanmokha/edetyv2/vendor/laravel/framework/src/Illuminate/Support/ServiceProvider.php(59): array_merge(Array, 1)
  
  #2 /Users/damanmokha/edetyv2/vendor/pbmedia/laravel-ffmpeg/src/FFMpegServiceProvider.php(25): Illuminate\Support\ServiceProvider->mergeConfigFrom('/Users/damanmok...', 'laravel-ffmpeg')
  
  #3 /Users/damanmokha/edetyv2/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(565): Pbmedia\LaravelFFMpeg\FFMpegServiceProvider->register()
  
  #4 /Users/damanmokha/edetyv2/vendor/laravel/framework/src/Illuminate/Foundation/ProviderRepository.php(74): Illuminate\Foundation\Application->register(Object(Pbmedia\LaravelFFMpeg\FFMpegServiceProvider))
  
  #5 /Users/damanmokha/edetyv2/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(540): Illuminate\Foundation\ProviderRepository->load(Array)
  
  #6 /Users/damanmokha/edetyv2/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/RegisterProviders.php(17): Illuminate\Foundation\Application->registerConfiguredProviders()
  
  #7 /Users/damanmokha/edetyv2/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(203): Illuminate\Foundation\Bootstrap\RegisterProviders->bootstrap(Object(Illuminate\Foundation\Application))
  
  #8 /Users/damanmokha/edetyv2/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php(267): Illuminate\Foundation\Application->bootstrapWith(Array)
  
  #9 /Users/damanmokha/edetyv2/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php(113): Illuminate\Foundation\Console\Kernel->bootstrap()
  
  #10 /Users/damanmokha/edetyv2/artisan(35): Illuminate\Foundation\Console\Kernel->handle(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  
  #11 {main} 

  if I don’t add these providers it works fine, but then I am not able to use ffmpeg without that.

  • Laravel Version 5.3
  • pbmedia/laravel-ffmpeg 1.3
  • php version : 7.1

• Can I use the "stream copy" of ffmpeg in OpenCV with VideoWriter class ?

  14 mai 2019, par DerekG

  Python : 3.6, Ubuntu 18.04, OpenCV 4.1.0

  I have an IP camera that streams video data in H.264 encoding. I would like to take this video stream and save it in a .avi file using Python without any encoding or decoding. Using a command line interface and ffmpeg commands, this is trivial to do.

  mycomputer@home:~$ ffmpeg -i rtsp://username:password@192.168.1.1/?framerate=30.0?streamprofile=defaultcameraprofile -acodec copy -vcodec copy output_file_name.avi 

  I’d like to do a similar thing from within Python using OpenCV. Currently, I am using VideoCapture class to read in each frame, and then using the OpenCV VideoWriter class to write this frame to a file. My issue is that the VideoWriter class requires a four_cc code to specify which codec is to be used during writing, whereas I don’t want to use any codec at all (or more precisely, I want to use the stream copy of FFmpeg, but there is to my knowledge no corresponding four_cc code). OpenCV documentation specifies that if I use the FFmpeg backend API and specify both a codec and framerate of 0, the raw stream should be written to the new file. However, when I do this, no file is created.

  cap = cv2.VideoCapture("rtsp://username:password@192.168.1.1/?framerate=30.0?streamprofile=defaultcameraprofile", cv2.CAP_FFMPEG)
  
  frame_width = int(cap.get(3))
  
  frame_height = int(cap.get(4))
  
  # output file, backend API, four_cc code integer, framerate, frame size tuple
  
  out = cv2.videoWriter("output_file.avi",cv2.CAP_FFMPEG,0,0,(frame_width,frame_height))

  I have tried many combinations of other input parameters to the videoWriter constructor but all of them either re-encode the stream or do not write an output file. For instance, I have tried nearly every combination of framerate 0,30, output file extension .avi, .mp4, .h264, .mkv, None and codec 0, "H.264", "RAW ", "DBI ", " ", "MPEG", "COPY", "NONE".

  out = cv2.videoWriter("output_file.avi",cv2.CAP_FFMPEG,cv2.VideoWriter_fourcc('H','2','6','4'),30,(frame_width,frame_height))

  Is it possible to use the FFmpeg stream copy within OpenCV to save video data without encoding it ? If not, I will change tact to running shell commands from within Python, but I’d prefer the former approach if feasible.

• difference between using SDL and using media player class that is videoview

  3 juin 2019, par Whoami

  I have been surfing the net for some time to get basic understanding of media framework in android. As part of this, to display video we have media player class or video view component which can easily display the video. When we have such solution provided by the framework itself, then why there are few components avaiable like SDL [ Simple Direct Media Layer], which claims the same functionality as video view ?

  How both are different ?