Added R and bash scripts

.gitignore

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+media/split/*.wav
+media
+.vscode
+media/

expansion_x10.R

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+library(warbleR)
+library(tuneR)
+
+# Set the inputs directory
+dir = "/home/ortion/records/"
+indir = paste0(dir, 'raw')
+outdir = paste0(dir, 'exp')
+
+# Set name prefix
+car = "721035"
+year = 2021
+pass = 0
+point = "Z2"
+prefix = paste0("Car", car, "-", year, "-", "Pass", pass, "-", point, "-")
+
+# Create the output directory
+dir.create(outdir)
+
+# Create a list of ".WAV" files
+wav_list=list.files(indir,"*.WAV")
+
+# To handle quite frequent crashes in mp32wav function
+wav_list=list.files(indir, pattern=".wav$")
+mp3_list=list.files(indir, pattern=".mp3$")
+while(length(wav_list)<length(mp3_list)) 
+{
+  Sys.time()
+  try(mp32wav())
+  Sys.time()
+  wav_list=list.files(indir,pattern=".wav$")
+  mp3_list=list.files(indir,pattern=".mp3$")
+  print(paste(length(wav_list),length(mp3_list),sep="/"))
+}
+
+# Split into 5 seconds files and apply X10 time expansion
+for (j in 1:length(wav_list))
+{
+  dur=0
+  if (is.null(wav_list[j]) || is.na(file.size(wav_list[j]) || file.size(wav_list[j]) == 0)) {
+    next
+  }
+  else if(file.size(wav_list[j]) > 50000)
+  {
+    wav_tmp = readWave(wav_list[j])
+    dur = duration(wav_tmp)
+    if (dur > 0)
+    {
+      for(k in 1:ceiling(dur/5))
+      {
+        left_channel_tmp = cutw(channel(wav_tmp,which="left"),from=(k-1)*5,to=min(dur,k*5),output="Wave")
+        left_channel_tmp = normalize(left_channel_tmp,level=0.3)
+        suf = formatC(x = k, width = 3, flag = "0") #create a suffix as 001, 000
+        savewav(left_channel_tmp,filename=paste0(SplitDir,substr(wav_list[j],1,nchar(wav_list[j])-4),"_",suf,".wav"))
+        if (length(wav_tmp@right) > 0){
+          right_channel_tmp = cutw(channel(wav_tmp,which="right"),from=(k-1)*5,to=min(dur,k*5),output="Wave",normalize= "16")
+          right_channel_tmp = normalize(right_channel_tmp,level=0.3)
+          savewav(right_channel_tmp,filename = paste0(SplitDir,substr(wav_list[j],1,nchar(wav_list[j])-4),"_",suf,".wav"))
+        }
+      }
+    }
+  }
+  print(paste(j,wav_list[j],dur))
+}
+
+

split_5s.sh

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+#!/bin/bash
+
+##########################################################
+#
+#   Split wav sounds into 5s wav using ffmpeg
+#
+##########################################################
+
+indir="/home/ortion/Documents/projects/time-expanseR/media/raw"
+outdir="/home/ortion/Documents/projects/time-expanseR/media/split"
+
+if [ ! -d $outdir ];
+then
+    mkdir $outdir
+fi
+
+cd $indir
+
+for item in `ls ./*.WAV`
+do
+    audio_dur=`sox --i -D $item`
+    # Convert float to int
+    audio_dur=${audio_dur%.*}
+    echo "$item ($audio_dur)"
+    ss=0
+    to=5
+    for ss in `seq 0 5 $(( $audio_dur - 5 ))`
+    do 
+        to=$(( $ss + 5 ))
+        echo $ss $to
+        ffmpeg -ss $ss -i "$indir/$item" -t $to -c copy "$outdir/$item-$ss.wav"
+    done
+done