VideoDurationCalculator.py

import os
import commands

# Paul Solt - get the length of all videos within a folder (recursive)
#
# Depending on the number of files/folders, it can take time to complete
#(100 files ~2.018 seconds to run)

# Set your video folder path here
path = "/Users/Shared/Course Videos/1 - Swift in 31 Days/Swift1 - Handbrake 1080"


def main():
    
    # Grab all the video (.mp4) files recursively for a folder
    filenames = []
    for root, dirs, files in os.walk(path):
        for file in files:
            if file.endswith(".mp4"):
                filenames.append(os.path.join(root, file))

    #Calculate the total time of all videos in folder
    totalTimeInSeconds = 0
    
    for file in filenames:
        # Calculate total time
        lengthInSeconds = videoLength(file)
        totalTimeInSeconds += lengthInSeconds
    
    hours = int(totalTimeInSeconds / 3600)
    minutes = int((totalTimeInSeconds - (hours * 3600)) / 60)
    print "hours:", hours, "Minutes:", minutes

# Parse the plist format from mdls command on Terminal
# @return the time in seconds
# mdls -plist - filename.mp4
def videoLength(filename):
    
    myCommand = "mdls -plist - "
    myCommand = myCommand + "\"" + filename + "\""
        
    status, plistInput = commands.getstatusoutput(myCommand)
    
    videoLength = 0
    searchTerm = "<key>kMDItemDurationSeconds</key>"
    
    # 1. find "<key>kMDItemDurationSeconds</key>"
    # 2. grab text until next </real>
    
    realStart = "<real>"
    realEnd = "</real>"
    
    index = plistInput.find(searchTerm)
    
    # Offset by length of search term
    startIndex = index + len(searchTerm)
    
    # Calculate new start/end positions
    startIndex = plistInput.find(realStart, startIndex)
    endIndex = plistInput.find(realEnd, startIndex)
    
    #offset start by length of realStart text
    startIndex += len(realStart)
    
    if startIndex != -1 and endIndex != -1:
        #Split and parse as number
        numberString = plistInput[startIndex:endIndex]
        numberString = numberString.strip()
        videoLength = float(numberString)
    else:
        print
    return videoLength

# Run the main method
main()