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• Ffmpeg create gif from images with fullPath

  4 juillet 2020, par padavan

  I need create gif from images in one line (without external file with list images). I dont understand how create if i have full paths ?

  


  /home/userMo/test/dir1/4.jpg 
/home/userMo/pics/late/sada_342.jpg


  


  I try by concat , but its dont work

  


  ffmpeg -i "concat:/home/userMo/test/dir1/4.jpg|/home/userMo/pics/late/sada_342.jpg" -loop -1 out.gif


  


• Compiler Optimization flags for ffmpeg on Intel Xeon Phi

  10 octobre 2016, par Ambujam

  I am trying to compile ffmpeg on Xeon Phi processor. Are there any specific compiler optimization flags specific for Xeon Phi that I can enable while configuring ffmpeg so that I can achieve better performance in terms of encoder frames per second ?

  Encoder used : x264
  Operating System : CentOS 7.2
  Compiler : GCC 4.8.5

  Currently, I am configuring ffmpeg with the below command line :

  ./configure --prefix="$HOME/ffmpeg_build" 
  
  --extra-cflags="-I$HOME/ffmpeg_build/include" 
  
  --extra-ldflags="-L$HOME/ffmpeg_build/lib" --bindir="$HOME/bin" 
  
  --pkg-config-flags="--static" --enable-gpl --enable-nonfree 
  
  --enable-libx264

• Python subprocess.Popen + ffmpeg breaks terminal input

  16 décembre 2020, par Barney Suit

  I was writing a module to create random screenshots from a video and used subprocess.Popen to run multiple commands in parallel but this leads to terminal refusing from showing any input once the python program is finished running. But it still accepts most inputs given from the keyboard it just doesn't display it.

  


  Only if I type the reset command terminal starts working fine
This happened on ssh with putty and other ssh clients even ssh with powershell on windows and directly running on terminal with VNC

  


  But without ssh directly running the same command on windows ssh works fine and and inputs are visible

  


  here's a gif example for whats happening


  


  and code to replicate it

  


  #!/usr/bin/env python3.8
from subprocess import Popen

def create_screenshots():

    commands = ['ffmpeg -hide_banner -loglevel panic -ss 329  -i "/home/user/file.mkv" -y -vframes 1   "/home/user/file.329.frame.png"',
                'ffmpeg -hide_banner -loglevel panic -ss 312  -i "/home/user/file.mkv" -y -vframes 1   "/home/user/file.312.frame.png"',
                'ffmpeg -hide_banner -loglevel panic -ss 533  -i "/home/user/file.mkv" -y -vframes 1   "/home/user/file.533.frame.png"',
                'ffmpeg -hide_banner -loglevel panic -ss 444  -i "/home/user/file.mkv" -y -vframes 1   "/home/user/file.444.frame.png"',
                'ffmpeg -hide_banner -loglevel panic -ss 411  -i "/home/user/file.mkv" -y -vframes 1   "/home/user/file.411.frame.png"',
                'ffmpeg -hide_banner -loglevel panic -ss 413  -i "/home/user/file.mkv" -y -vframes 1   "/home/user/file.413.frame.png"']
    screenshot_files = []
    processes = [Popen(command, shell=True) for command in commands]
    for process in processes:
        process.wait()
    
    return screenshot_files


create_screenshots()