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• Script doesnt recognize bars / length right for cutting audio , ffmpeg terminal

  14 avril 2024, par totzillarbeats

  This terminal script doesn't recognize bars / length right for cutting audio, maybe somebody knows what's wrong with the calculation ...

  


  Would be happy about any help the cutting already works !

  


  #!/bin/bash

# Function to extract BPM from filename

get_bpm() {
    local filename="$1"
    local bpm=$(echo "$filename" | grep -oE '[0-9]{1,3}' | head -n1)
    echo "$bpm"
}

# Function to cut audio based on BPM
cut_audio() {
    local input_file="$1"
    local bpm="$2"
    local output_file="${input_file%.*}_cut.${input_file##*.}" # Appends "_cut" to original filename

    # Define the number of beats per bar (assuming 4 beats per bar)
    beats_per_bar=4

    # Calculate the duration of each bar in seconds
    bar_duration=$((60 * beats_per_bar / bpm))

    # Define start and end times for each bar range
    start_times=(0 21 33 45 57 69 81 93 105 117 129 141)
    end_times=(20 29 41 53 65 77 89 101 113 125 137 149)

    # Iterate through each bar range
    for ((i = 0; i < ${#start_times[@]}; i++)); do
        start_time=${start_times[$i]}
        end_time=${end_times[$i]}
        echo "Cutting audio file $input_file at $bpm BPM for bar $((i + 1)) ($start_time-$end_time) for $bar_duration seconds..."

        # Cut audio for current bar range using ffmpeg
        ffmpeg -i "$input_file" -ss "$start_time" -to "$end_time" -c copy "$output_file"_"$((i + 1)).${input_file##*.}" -y
    done

    # Check if the output files are empty and delete them if so
    for output_file in "${output_file}"_*; do
        if [ ! -s "$output_file" ]; then
            echo "Output file $output_file is empty. Deleting..."
            rm "$output_file"
        fi
    done

    echo "Audio cut and saved as $output_file"
}


# Main script
if [ "$#" -eq 0 ]; then
    echo "Usage: $0 [audio_file1] [audio_file2] ..."
    exit 1
fi

for file in "$@"; do
    bpm=$(get_bpm "$file")
    if [ -z "$bpm" ]; then
        echo "Error: No BPM found in filename $file"
    else
        cut_audio "$file" "$bpm"
    fi
done


  


  Maybe its only the math calc in the beginning but idk :)

  


  If you need more details just lmk

  


• Batch : Looping through folders and subfolders and get them into a script

  2 janvier 2017, par arielbeje

  I want to convert .flac files from X:\Music\flac\flacfolder\name.flac to X:\Music\mp3\flacfolder\name.mp3 using ffmpeg, but I couldn’t find how to loop through while passing the directory to a different command and manipulating it.

• Calling pkill to pause a process with subprocess inside a class in python suspends the python script

  31 mars 2017, par muammar

  I have a class that contains a "blocking method". Inside that method, I am listening to keys to perform some actions. The action in question is pkill. Below I am pasting it :

  def show_control(self, control):
  
      """docstring for control"""                                                                                                                           
  
      if control == True:        
  
          from mkchromecast.getch import getch, pause
  
  
  
          self.controls_msg()    
  
          try:                   
  
              while(True):       
  
                  key = getch()  
  
                  if(key == 'p'):     
  
                      if self.videoarg == True:
  
                          print('Pausing Casting Process...')
  
                          subprocess.call(['pkill', '-STOP', '-f', 'ffmpeg'])
  
                      ...

  It turns out that the ffmpeg process is paused, but the python script gets suspended ?. I don’t understand why that is the case. If one creates the same function in a regular script (not inside a class to be clearer) this does not happen. I have tried using multithreading and multiprocessing modules without success. What am I doing wrong ?. Thanks.