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• ffmpeg record screen file formats

  3 avril 2020, par New_Dev

  Good day,
I'm currently writing a bash script which records the screen under certain conditions. The problem is that only avi works as a file extension for recording the screen. This script is going to be used on an Raspberry Pi and currently I get on a decent virtual machine only 10-20 fps (goal would be around 30 fps). I think .avi is not suited for my project. But .mpeg and .mp4 are not working for recording. I tried recording with .avi and then converting it in .mp4, but I have limited memory and .avi ist just too big in size. I use currently the following command :

  



  ffmpeg -f x11grab -y -r 30 -s 960x750 -i :0.0+0,100 -vcodec huffyuv ./Videos/out_$now.avi
//$now is the current date and time


  



  So I wanted to know if I need some special packages from ffmpeg to record with for example .mp4 or if there are other file formats available for ffmpeg screen recording.

  



  Edit :
I found that the codec libx264 for mp4 works, but the fps drop until they hit5 fps, which is definetly too low. The recorded video appeared like being a fast forward version of the recorded screen.

  



  With mpeg4 for mpeg I reached over 30 fps, but the video qualitywas very bad.

  



  It appears that even my big avi-files look like being played fast forward. Is there something I do wrong ?

  



  Is there a good middle way, where I get a decend video quality, good fps (20+) and a file which isn't too big ?

  



  Edit 2 :
I tried recording it with .avi and converting it afterwards. Just converting with ffmpeg -i test.avi -c:a aac -b:a 128k -c:v libx264 -crf 23 output.mp4 
resulted in the same framedrops as if I was recording with .mp4. But when I cut a littlebit of the beginning of the video and named the outputfile .mp4, the size became much smaller. But when I started the cutting at 0:00:00 (so tried just converting), it just changed the file format without converting it (so the size stayed the same). Any ideas ?

  


• How to directly record screen in .mp4 format using ffmpeg in Windows10 ? [on hold]

  9 août 2019, par Alex Salagean

  I have been using .gifs to make short screen recordings but as the video duration gets longer, the file size also gets a lot larger. Therefore, I want to directly record my screen in a .mp4 format.

  I have tried making a .gif animation using multiple separate images and then converting them to .mp4 via ffmpeg but I need a command which lets me directly record the screen using the .mp4 format.

• Best multiplatform C++ Library for screen, audio and microphonecapture [closed]

  15 novembre 2019, par Baschdel

  Im searching for some librarys C++.
  I’m trying to record an microphone and capture the computerscreen.

  At the moment I am recording audio with portaudioand use the screencapture part of ffmpeg.
  Muxing the streams together should be accomplished by ffmpeg.

  The whole project should run on macOS, Windows and Linux.

  I’m relativly new to this subject so I really don’t know if this are the right tools to use, or if there are much easyer and better tools.

  For my understanding ffmpeg is the biggest and best library for sclaing muxing, etc. But ffmpeg is not great in recordig screen or audio.

  Does somebody got experience with this librarys or ideas of different librarys ?