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• RuntimeError : No MovieWriters available in Matplotlib animation

  24 mai 2020, par user8715977

  The problem I am getting is in code similar to this example : 
https://matplotlib.org/examples/animation/basic_example_writer.html

  



  The error :

  



  RuntimeError : No MovieWriters available occurs at Writer = animation.writers['ffmpeg'] in the example above.

  



  I am using mac, I have installed ffmpeg using brew, and even installed it with conda even though I am not using anaconda for this particular code.

  



  I am positive that it is installed - I have used it in terminal to change files but it is not working within the program.

  



  Thanks !

  


• Install ffmpeg with applescript

  2 février 2020, par andy stumpf

  I’m trying to create an applescript that installs ffmpeg. I have two issues.

  • I want to install Xcode, homebrew, ffmpeg, node, grant permissions, and ffmpeg-progressbar-cli one at a time. Not all at once but in that order. ffmpeg is dependant on xcode so it needs to wait before xcode is done installing.
  • The command for homebrew requires " which applescript makes me change to a ' before I can run it but in this case it doesn’t work.

  Here is the script I have so far.

  tell application "Terminal"
  
      do script "xcode-select --install && ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" && brew install ffmpeg && brew install node && sudo chown -R $(whoami) /usr/local/bin /usr/local/etc && npm install --global ffmpeg-progressbar-cli"
  
      activate
  
  end tell

  I tried this and it doesn’t seem to work as intended.

  tell application "Terminal"
  
          do script "sudo chown -R $(whoami) /usr/local/bin /usr/local/etc && xcode-select --install"
  
          display dialog "Select OK once Xcode has installed" buttons {"OK"} default button 1
  
          do script "ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)""
  
          display dialog "Select OK once Homebrew has installed" buttons {"OK"} default button 1
  
          do script "brew install ffmpeg"
  
          display dialog "Select OK once ffmpeg has installed" buttons {"OK"} default button 1
  
          do script "brew install node"
  
          display dialog "Select OK once node has installed" buttons {"OK"} default button 1
  
          do script "npm install --global ffmpeg-progressbar-cli"
  
          display dialog "Select OK once ffmpeg-bar has installed" buttons {"OK"} default button 1
  
          activate
  
      end tell

  For the second issue it needs to be

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

  but applescript makes me change it to

  ruby -e '$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)'

  with single quote which doesn’t work.

  Help and suggestions apreciated !

• Invalid data found when processing input when using ffpmeg

  19 février 2023, par user12027978

  I want to convert an mp3 audio to an mp4 video with a cover.And i wrote this line of code in terminal.
ffmpeg -loop 1 -i black.jpg -i sound.wav -c:v libx264 -c:a aac -b:a 192k -shortest anhao.mp4
but got this error,enter image description here.I'm new to ffmpeg, and the code is copied from Internet, I really don't konw how to edit it.

  


  i expect converting mp3 to mp4 with an exact picture showing all the time
black.jpg is as follows
enter image description here