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• How to create a FFMPEG VIDSTAB batch script Windows

  2 octobre 2019, par esdoublelef

  i’m a photographer and I download photographs (.jpg) and videos (.mov) into a single Windows folder

  I’m looking to create a script that will run the below 3 lines of FFMPEG for every instance of .mov in the folder and let it create stabilized .mp4 copies of the video. I’ll delete the originals manually later.

  ffmpeg -i DSCF0229.MOV -vf vidstabdetect=shakiness=5:accuracy=15:stepsize=6:mincontrast=0.3:show=2 -y dummy.mp4
  
  
  
  ffmpeg -i DSCF0229.MOV -vf scale=trunc((iw*1.15)/2)*2:trunc(ow/a/2)*2 -y scaled.mp4
  
  
  
  ffmpeg -i scaled.mp4 -vf vidstabtransform=smoothing=30:input="transforms.trf":interpol=linear:crop=black:zoom=0:optzoom=1,unsharp=5:5:0.8:3:3:0.4 -y DSCF0229stabilized.mp4

  i can tweak a bit of code, but i’m clueless on where to start. i tried "for do" and even a batch.bat file, but i just can’t get the proper syntax right.

  really appreciate any help here !!

• How can I run this command in a shell script

  21 janvier 2011, par Sascha

  This is my shell script but it gives errors :

  #!/bin/sh
  
  
  
  while getopts "i:o:" flag
  
  do
  
     case $flag in
  
     i) file_input=$OPTARG
  
     ;;
  
     o) file_output=$OPTARG
  
     ;;
  
     esac
  
  done
  
  
  
  mplayer -nosound -benchmark -vo yuv4mpeg:file=>(x264 --demuxer y4m \
  
                --crf 20 --threads auto --output $file_output - ) $file_input

  The error message is :

  Can't get memory or file handle to write ">(x264 —demuxer y4m —crf 20 —threads auto —output video.264 - )" !FATAL : Cannot initialize video driver.

  When I run this cmd on putty :

  mplayer -nosound -benchmark -vo yuv4mpeg:file=>(x264 --demuxer y4m \
  
                --crf 20 --threads auto --output video.264 - ) video.wmv

  it works perfectly..

  What am I doing wrong ?

• Redirect shell output for ruby script

  2 juin 2015, par rs41

  I have simple ruby script :

   #! /usr/bin/env ruby
  
   require 'fileutils'
  
  
  
   FileUtils.rm "output.mkv" if File.exists?("outp    ut.mkv")
  
   pid = Process.spawn("ffmpeg -i wrong_file.mp4 -c:v libx264 -preset veryslow -qp 0 output.mkv", STDOUT => "output.txt", STDERR => "error.txt")
  
  
  
   puts "pid : #{pid}"
  
   Process.wait(pid)

  But, STDOUT and STDERR outputs into error.txt, why ?

  It looks, that ffmpeg have another exit codes ?(in usual case 0 for stdout, and 1 for stdin)

  Note : I don’t want to use native shell redirect like ’> output.txt 2> error.txt’ because i want to get pid of ffmpeg process, not shell process and kill it in future.