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• avfilter/vf_histogram : add mirrored waveform mode

  2 octobre 2013, par Marton Balint

  avfilter/vf_histogram : add mirrored waveform mode
  Added parameter to mirror the waveform (high values are shown on top in column mode)
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] doc/filters.texi
  • [DH] libavfilter/version.h
  • [DH] libavfilter/vf_histogram.c

• Can't break out of innermost while loop — Bash - Ubuntu

  16 novembre 2014, par Kenny Powers

  Whenever the two MD5 check sums ($SUMCHK1 & $SUMCHK2) match up in this script I get stuck in the innermost while loop, so the script never ends. When the two log files match, I get an endless echo of the two md5sums on the screen.

  #!/bin/bash
  
  
  
  FULLPATH=$1
  
  FPS=$2
  
  AVI=$(basename $1)
  
  AVIDIR=$HOME/q7video/$AVI
  
  TMPFILE=$AVIDIR/tmp.txt
  
  TMPFILE2=$AVIDIR/tmp2.txt
  
  NEWFILES=$AVIDIR/tmp3.txt
  
  FFLOG=$AVIDIR/ffmpeg.log
  
  LOGFILE=$AVIDIR/log.log
  
  FACESDIR=$AVIDIR/faces
  
  
  
  # CREATE FOLDER STRUCTURE, NO ERROR IF DIR PRE-EXISTS
  
  mkdir --parents $AVIDIR
  
  mkdir --parents $FACESDIR
  
  touch $TMPFILE $TMPFILE2 $NEWFILES $LOGFILE
  
  echo $AVI > $LOGFILE
  
  
  
  # DUMP THUMBNAILS FROM SPECIFIED AVI FILE
  
  ffmpeg -i $FULLPATH -f image2 -vf fps=fps=$FPS $AVIDIR/$AVI%03d.jpg null >/dev/null 2>$FFLOG &
  
  
  
  # DELAY TO ALLOW LOOP A WORKING DIRECTORY BEFORE START
  
  sleep 2
  
  
  
  #TOUCH FILES TO PREVENT NO FILE ERROR
  
  touch $TMPFILE $TMPFILE2
  
  
  
  # INITIALIZE VARIABLE FOR LOOP
  
  CHECK=`pgrep ffmpeg`
  
  I=0
  
  SUMCHK1=`md5sum $TMPFILE`
  
  SUMCHK2=`md5sum $TMPFILE2`
  
  
  
  while [[ "$CHECK" -gt "$I" ]]; do
  
      sleep 2
  
      echo FFMPEG RUNNING
  
      ls $AVIDIR/*.jpg > $TMPFILE
  
      while [[ "$SUMCHK1" != "$SUMCHK2" ]]; do
  
          comm -23 $TMPFILE $TMPFILE2 > $NEWFILES
  
          while read F ; do
  
              echo $F
  
              echo $F >> $TMPFILE2
  
              echo $F >> $LOGFILE
  
              python opencvtest.py $F >> $LOGFILE
  
          done < $NEWFILES
  
          ls $AVIDIR/*.jpg > $TMPFILE
  
          SUMCHK1=`md5sum $TMPFILE`
  
          SUMCHK2=`md5sum $TMPFILE2`
  
          echo $SUMCHK1
  
          echo $SUMCHK2
  
      done
  
      CHECK=`pgrep ffmpeg`
  
      echo $CHECK
  
  done
  
  
  
  
  
  
  
  # COPY IMAGES WITH A FACE TO FACESDIR
  
  
  
  
  
  # CLEANUP LOGS
  
  #rm $TMPFILE $TMPFILE2 $NEWFILES

• Why do my Windows filenames keep getting converted in Python ?

  13 avril 2024, par GeneralTully

  I'm running a script that walks through a large library of .flac music, making a mirror library with the same structure but converted to .opus. I'm doing this on Windows 11, so I believe the source filenames are all in UTF-16. The script calls FFMPEG to do the converting.

  


  For some reason, uncommon characters keep getting converted to different but similar characters when the script runs, for example :

  


  06 xXXi_wud_nvrstøp_ÜXXx.flac

  


  gets converted to :

  


  06 xXXi_wud_nvrstøp_ÜXXx.opus

  


  They look almost identical, but the Ü and I believe also the ø are technically slightly different characters before and after the conversion.

  


  The function which calls FFMPEG for the conversion looks like this :

  


  def convert_file(pool, top, file):
    fullPath = os.path.join(top, file)
    # Pass count=1 to str.replace() just in case .flac is in the song
    # title or something.
    newPath = fullPath.replace(src_dir, dest_dir, 1)
    newPath = newPath.replace(".flac", ".opus", 1)

    if os.path.isfile(newPath):
        return None
    else:
        print("{} does not exist".format(newPath))
   
        cvt = [
            "Ffmpeg", "-v", "debug", "-i", fullPath, "-c:a", "libopus", "-b:a", "96k", newPath]
        print(cvt)

        return (
            fullPath,
            pool.apply_async(subprocess.run, kwds={
                "args": cvt,
                "check": True,
                "stdin": subprocess.DEVNULL}))


  


  The arguments are being supplied by os.walk with no special parameters.

  


  Given that the script is comparing filenames to check if a conversion needs to happen, and the filenames keep getting changed, it keeps destroying and recreating the same files every time the script runs.

  


  Why might this be happening ?