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• ffmpeg - adding white background to complex png command

  5 août 2022, par Uriel Romano

  I have a complex concatenation of commands working perfectly :

  


  ffmpeg -r 24 -i "D:\batches\S3025C-SV_"%%03d.png -vf "scale=out_color_matrix=bt709,eq=gamma=1:saturation=1,fps=25, crop=trunc(iw/2)*2:trunc(ih/2)*2" -color_primaries bt709 -color_trc bt709 -colorspace bt709 "D:\batches\S3025C-SV.mp4"

  


  Now I need to add a white background to this mp4 render, as ffmpeg is using a black one by default. I've found the following command here :

  


  -filter_complex "[0:v] setpts=PTS-STARTPTS [graphs]; [1:v][graphs] overlay=shortest=1 [out]" -map "[out]"

  


  How could I combine this operation into the first one ? I've tried a couple of different syntaxes but couldn't get it to work.

  


  Thanks for your help !

  


• Noobs approach to automate x264 cmd

  16 novembre 2012, par nightcrawler

  so here is my script to loop through specific video extensions » add a manual profile » generate necessary *.bat & finally a final 'loader' batch file to execute previous *.bat files sequentially & necessary logging (this gives quiet a deal of freedom if you so want)

  ::==
  
  :: gets lines into vars c1 v2 v...
  
  @echo off
  
  :: user input required
  
  cd /d "d:\Trainers\out\"
  
  setLocal EnableDelayedExpansion
  
  dir /B /O:N | findstr ".wmv$ " >filename.txt
  
  echo. >log.txt
  
  :: user input required
  
  for /f "tokens=* delims= " %%a in ('type filename.txt ^|findstr ".wmv$"') do (
  
  set /a n+=1
  
  echo. >file!n!.bat
  
  set in=%in%%%a
  
  :: user input required
  
  set out=!in:.wmv=.mp4!
  
  :: user input required
  
  set v=x264 --crf 23  --level 3.1 --tune film -o "d:\Trainers\out\!in!" "d:\Trainers\out\!out!"
  
  echo. !v!>file!n!.bat
  
  )
  
  dir /B /O:N | findstr ".bat$ " >x264_home.txt
  
  for /f "tokens=* delims= " %%a in (x264_home.txt) do (
  
  set /a n+=1
  
  :: mtee is an external library Google it
  
  set "z=call %%a | mtee /d/c/t/+ log.txt"
  
  echo. !z! >> x264_home.bat
  
  )
  
  echo. @echo off > newFile.bat
  
  type x264_home.bat >> newFile.bat
  
  type newFile.bat > x264_home.bat
  
  del newFile.bat,x264_home.txt,filename.txt
  
  echo. pause >> x264_home.bat
  
  echo. @echo All Operation done... >> x264_home.bat
  
  :: user input required
  
  move "d:\Trainers\out\*.bat" "d:\Program Files\x264_auto\test\"
  
  :: user input required
  
  move "d:\Trainers\out\log.txt" "d:\Program Files\x264_auto\test\"
  
  ::==

  Now the above code which is fairly easy to understand (bcz its written by a noob) run perfectly & create necessary files. For instance one of the file1.bat looks like this :

  x264 --crf 23  --level 3.1 --tune film --preset veryslow --deblock -2:-1 --zones 24233,25324,q=20 --acodec aac --abitrate 80 -o "d:\Trainers\out\1.wmv" "d:\Trainers\out\1.mp4"

  ...& the loader .bat file looks like

   @echo off 
  
   call file1.bat | mtee /d/c/t/+ log.txt 
  
   call file2.bat | mtee /d/c/t/+ log.txt
  
   call file3.bat | mtee /d/c/t/+ log.txt
  
   @echo All Operation done... 

  You see this is a quiet flexible approach in that you can use special filestr » set another loop » set another profile. Furthermore every batch file can be latter edited especiialy when you heavily use --zone x264 feature
  I am successful because there is no error in any output ...but its the x264.exe (provider/compiler x264GUI) throws error which it otherwise don't ?

  d:\Program Files\x264_auto\test>x264 --crf 23  --level 3.1 --tune film --preset
  
  veryslow --deblock -2:-1 --zones 24233,25324,q=20 --acodec aac --abitrate 80 -o
  
  "d:\Trainers\out\1.wmv" "d:\Trainers\out\1.mp4"
  
  ffms [error]: could not create index
  
  lavf [error]: could not open input file
  
  raw [error]: raw input requires a resolution.
  
  x264 [error]: could not open input file `d:\Trainers\out\1.mp4' via any method!

  its the x264 thats the culprit perhaps a senior guide is required here

• avfilter/vf_colorcorrect : remove code touching Y component

  15 août 2021, par Paul B Mahol

  avfilter/vf_colorcorrect : remove code touching Y component
  It is not needed operation.
  

  • [DH] libavfilter/vf_colorcorrect.c