awk_round () {
awk 'BEGIN{printf "%."'$1'"f\n", "'$2'"}'
}
round () { 
ssvar="$(awk_round "5" "$ssvar")"
tovar="$(awk_round "5" "$tovar")"
}

c="1"
quiet=(-hide_banner -loglevel info -nostats -nostdin)
cat detect.log | while read _ ssvar; read _ tovar; do
    #pad name
    printf -v name "%03d" "$c"
    # action

    echo; echo "-ss $ssvar -to $tovar"
    echo "--------------------------------------"
    if [ -z "$tovar" ]; then 
        round && ffmpeg "${quiet[@]}" -i "${input}" -ss "$ssvar" -c:a copy "${name}".m4a
    else
        round && ffmpeg "${quiet[@]}" -i "${input}" -ss "$ssvar" -to "$tovar" -c:a copy "${name}".m4a
    fi
    (( c++ ))
done

This script appears to be using awk and ffmpeg to process a file called detect.log and extract pairs of values (ssvar and tovar). It then rounds these values to 5 decimal places using the round function, which calls the awk_round function.

The awk_round function takes two arguments: the number of decimal places to round to, and the value to round. It then uses awk to print the rounded value with the specified number of decimal places.

The script then reads the input file detect.log line by line, using the read command in a while loop. For each line, it extracts the two values (ssvar and tovar) and rounds them to 5 decimal places using the round function.

Next, the script increments a counter (c) and formats it as a three-digit number with leading zeros (e.g. 001, 002, etc.). It then uses ffmpeg to process the input file input, using the -ss and -to options to specify the start and end times of the output file. The output file is named using the formatted counter value, with a .m4a extension. If tovar is not set, then ffmpeg will only use the -ss option and process the input file from the specified start time until the end. The -c:a option specifies that the audio stream should be copied to the output file without any further processing.

input="/path/to/my/example.m4a"
# And then pasting the snippet 

i want to split a large wma file to single ones and then convert to dsd

#!/bin/bash

# Detect silence.  Change dB value to adjust silence detection.
ffmpeg -i "${1}" -af silencedetect=noise=-25dB:d=1 -f null - 2> silence_detected.txt

# Filter detected results for end times.  
awk '/silence_end/ {print $5}' silence_detected.txt > silence_filtered.txt

# Get total file duration (in seconds) and append to filtered text file.
ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "${1}" >> silence_filtered.txt

# Loop through the silence_filtered.txt file, use those times to split the file.
# New files are named with their starting time from original file.
S_TIME="0"
while read p; do
E_TIME="${p}"
ffmpeg -v error -nostdin -i "${1}" -ss ${S_TIME} -t ${E_TIME} -c:a copy ${S_TIME}.wav
S_TIME="${E_TIME}"
done < silence_filtered.txt

...but that's not going to work in Windows.

But I'm sure it could be adapted to a batch file.

Or there's options to run bash scripts with Cygwin or WSL under Windows.

i would like to use audacity for that but its too much fatigue i think. the file i want to split contains at least 30 tracks

Quote from: Replica9000 on 2023-01-06 01:37:01

But I'm sure it could be adapted to a batch file.

I'm not sure about the "loop through the silence_filtered.txt file" part, and even so the OP would need to find a "DOS" version of AWK.

Quote from: Replica9000 on 2023-01-06 01:37:01

Or there's options to run bash scripts with Cygwin or WSL under Windows.

But doesn't the availability of AWK remain a problem?

I think it would be simpler to actually run that in Linux, using a virtual machine or live boot.

WSL is Linux, so you can be certain that any program you run in Linux will work the same in WSL.

The only thing I can think of that might be different is saving the script in the first place - Windows text editors tend to assume you want Windows (CRLF) line endings, but Linux programs don't always handle that very gracefully.

GnuWin32 saved me more than once when I migrated to Windows. Packages: https://gnuwin32.sourceforge.net/packages.html