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• Amazon S3 : how to combine all images into a video ?

  9 septembre 2021, par scientiffic

  I'm in my Rails app, I enable users to upload images, which get processed using ffmpeg to create a video slideshow.

  



  I have this working locally, but am wondering how to do this when deploying the app using Heroku. In particular, I know Heroku has limited storage and has a read-only filesystem, so using Carrierwave without S3 or an external storage option doesn't seem like an option.

  



  But how would I run a task like the following using S3, where I combine all images into a video ?

  



  The ffmpeg command is

  



  ffmpeg -r 5 -i https://s3.amazonaws.com/[]/uploads/image/image_file/26/img%03d.jpg output.mp4 -y


  



  And the AWS "folder" contains the following :
https://s3.amazonaws.com/[]/uploads/image/image_file/26/img001.jpg
https://s3.amazonaws.com/[]/uploads/image/image_file/26/img002.jpg
https://s3.amazonaws.com/[]/uploads/image/image_file/26/img003.jpg

  



  When I try to do the following, I get an error with ffmpeg not knowing what to do with :

  



  https://s3.amazonaws.com/[]/uploads/image/image_file/26/img%03d.jpg


  



  Note, this whole video compilation process works fine for me locally, so I know in theory it should work.

  


• having serious trouble with opencv3 install

  21 juillet 2016, par entercaspa

  does anyone know what this means ? I thought I had uninstalled ffmpeg before this as i botched an earlier install

  Determining if the include file ffmpeg/avformat.h exists failed with the following output:
  
  Change Dir: /Users/samina/Documents/opencv /opencv-3.1.0/build/CMakeFiles/CMakeTmp
  
  
  
  Run Build Command:"/usr/bin/make" "cmTC_54b80/fast"
  
  /Library/Developer/CommandLineTools/usr/bin/make -f CMakeFiles/cmTC_54b80.dir/build.make CMakeFiles/cmTC_54b80.dir/build
  
  Building C object CMakeFiles/cmTC_54b80.dir/CheckIncludeFile.c.o
  
  /Library/Developer/CommandLineTools/usr/bin/cc   -fsigned-char -W -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-unnamed-type-template-args -fdiagnostics-show-option -Wno-long-long -Qunused-arguments -Wno-semicolon-before-method-body -fno-omit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -fvisibility=hidden -fvisibility-inlines-hidden  -O3 -DNDEBUG   -o CMakeFiles/cmTC_54b80.dir/CheckIncludeFile.c.o   -c "/Users/saminahbab/Documents/opencv /opencv-3.1.0/build/CMakeFiles/CMakeTmp/CheckIncludeFile.c"
  
  /Users/samina/Documents/opencv /opencv-3.1.0/build/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:10: fatal error: 'ffmpeg/avformat.h' file not found
  
  #include <ffmpeg></ffmpeg>avformat.h>
  
           ^
  
  1 error generated.
  
  make[1]: *** [CMakeFiles/cmTC_54b80.dir/CheckIncludeFile.c.o] Error 1
  
  make: *** [cmTC_54b80/fast] Error 2

  following on from this (trying to use cmake to build opencv but having serious trouble getting the steps right) is there any easier way to get opencv3 working in Pycharm with python 3.5.1 ?

• Trouble with ffmpeg on mac os catalina 10.15.3

  27 décembre 2020, par Scuds

  I had ffmpeg installed before upgrading my os to catalina. When I tried to re-encode a video it complained with this message

  



  dyld: Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib
  Referenced from: /usr/local/bin/ffmpeg
  Reason: image not found
zsh: abort      ffmpeg


  



  I found out openssl isn't used in catalina in favor for libressl.. 
I did a brew search openssl and found I have openssl@1.1 not 1.0.0

  



  I'm weary about messing around with the version of openssl because so many other programs depend on it and I don't want to screw up my system..

  



  My question is how can I get ffmpeg to run on my system ? Mac os catalina 10.15.3