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• How to compress a image size to a desired file size in KBs using ffmpeg or python or Ubuntu Command line ?

  4 mars 2019, par yash17

  I’m using ffmpeg to take a screenshot from a udp stream.
  Due to varying bit rates while transmission, the captured screenshot has different file size everytime.400KB,500KB..Even though it is screenshot of a same static page.

  Is there a way to get a specific file size every time, in ffmpeg ?

  Or is there a command to convert a captured file to the desired KB using Python or through Ubuntu terminal ?

  Here is the command I’m using.

  ffmpeg -i udp://@XXX.XX.XX.XX:XXXX -vframes 1 -q:v 1 test.png

  I also tried the following commands in terminal, but it did nothing.

  convert -define jpeg:extent=100kb test.png output.png

• Applescript to automatically convert new downloaded MKV files using ffmpeg

  18 février 2014, par user3315469

  I'm new to Applescript and would love some help figuring out how to use it to make my life easier. I want to create a script that automatically selects new movies added to a folder (actually a folder within a folder, as I have a "Movies" folder and then each movie gets its own folder within that), checks the extensions, and converts them using the Terminal if they have extension .mkv. The Terminal command I want to run is

  ffmpeg -i -y [movie_name].mkv -c copy [movie_name].mp4

  It will need to look in the correct folder for the movie, which is already automatically created when the movie is added. So, to clarify, there's a "Movies" folder, which contains the newly created folder for a specific movie, which in turn contains the newly added movie file.

  I am running Mavericks on a MacBook Pro.

• How to permanently make ffmpeg recognizable from bin/bash in macOS

  10 avril 2022, par Anonymous

  I downloaded a zip for ffmpeg, because brew installation was not compatible with macOS High Sierra 10.13.6. After unzipping, the only file contained was ffmpeg, its icon is similar to the icon of the terminal. I want to get the terminal(which runs bin/bash $SHELL) to permanently recognise ffmpeg command.

  


  If I type :

  


  

  1. echo export PATH="/Users/imac/Documents/ffmpeg:$PATH" > ~/.bashrc

  


  2. source ~/.bashrc

  


  3. ffmpeg
then the command ffmpeg is recognized, so everything is ok.

  


  


  However if I exit the terminal and re-open it, or just restart the computer
ffmpeg gives as output -bash: ffmpeg: command not found. So I have to do every time steps 1 and 2 that were describe above.

  


  


  4. Output of cat .bashrc :
export PATH=/Users/imac/Documents/ffmpeg:/Library/Frameworks/Python.framework/Versions/3.9/bin:/Library/Frameworks/Python.framework/Versions/3.10/bin:/opt/anaconda3/condabin:/Library/Frameworks/Python.framework/Versions/3.9/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin

     


  


  5. Output of echo $PATH :
/Library/Frameworks/Python.framework/Versions/3.9/bin:/Library/Frameworks/Python.framework/Versions/3.10/bin:/opt/anaconda3/condabin:/Library/Frameworks/Python.framework/Versions/3.9/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin

     


  


  


  Note that in step 4 ffmpeg appears(in the location I have it stored) whereas in step 5 ffmpeg is absent. Also I have little knowledge of bash and terminal, so if you can, please be explanatory in answers and/or comments. Thank you very much !