Motion Capture Sorting

Sunday, 06 January 2008

When using Motion for a security camera setup, it can generate a lot of files… One installation I have setup has “Encode movies in real-time” enabled, so not only are there many .jpgs in the capture directory, but also .avis.

This can become quite tedious… copying and pasting them from a GUI every day. Consequently, I would let the files simply pile up for a few days before moving them around. Then it became a big job.

Scripting to the rescue. The following below is a PHP-CLI script, that when run from the motion capture directory will sort the various files into a nice little structure that allows for dropping the .avis into a play list for viewing, and keeps the .jpgs around for backup.

#!/usr/bin/env php
<?php
// v. 1.0
$fileExtOne = '.jpg';
$fileExtTwo = '.avi';
$fileNameArray = array();

//dump filenames (ending in .jpg or .avi) in current directory into array
if ($handle = opendir('.')) {
  while (false !== ($file = readdir($handle))) {
    if (substr($file, -4) == $fileExtOne ||
      substr($file, -4) == $fileExtTwo) {
      array_push($fileNameArray, $file);
    }
  }
  closedir($handle);
}

if (count($fileNameArray) <= 0) { exit("No files to process.\n"); }

//make multi-dimensional array with substrs of filename
for ($i=0; $i<count($fileNameArray); $i++) {
  $fileNameSplit = split('-',$fileNameArray[$i]);
  $dirArray[$i]['group'] = $fileNameSplit[0];
  $dirArray[$i]['year'] = substr($fileNameSplit[1], 0, 4);
  $dirArray[$i]['month'] = substr($fileNameSplit[1], 4, 2);
  $dirArray[$i]['day'] = substr($fileNameSplit[1], 6, 2);
  $dirArray[$i]['name'] = $fileNameArray[$i];
}

//create unique array with new directory names and make them
for ($i=0; $i<count($dirArray); $i++) {
  $dirNameArray[$i] = $dirArray[$i]['year']
    .'-'. $dirArray[$i]['month']
    .'-'. $dirArray[$i]['day']
    .'/'. $dirArray[$i]['group'];
  }
  $uniqueNewDirNames = array_unique($dirNameArray);
  foreach ($uniqueNewDirNames as $value) {
    $splitUniqueDirNames = split('/', $value);
    $newDirName = $splitUniqueDirNames[0] . '/' . $splitUniqueDirNames[1];
    if (!file_exists($newDirName)) {
    if (mkdir($newDirName, 0755, true)) {
      echo 'Created directory: ' . $newDirName . "\n";
    }
  }
}

//move files into the appropriate directories
for ($i=0; $i<count($dirArray); $i++) {
  if (substr($dirArray[$i]['name'], -4) == $fileExtOne) {
    $newFileName = $dirArray[$i]['year']
      .'-'. $dirArray[$i]['month']
      .'-'. $dirArray[$i]['day']
      .'/'. $dirArray[$i]['group']
      .'/'. $dirArray[$i]['name'];
    if (rename($dirArray[$i]['name'], $newFileName)) {
      echo 'Moved file: ' . $newFileName . "\n";
    }
  }

  if (substr($dirArray[$i]['name'], -4) == $fileExtTwo) {
    $newFileName = $dirArray[$i]['year']
      .'-'. $dirArray[$i]['month']
      .'-'. $dirArray[$i]['day']
      .'/'. $dirArray[$i]['name'];
    if (rename($dirArray[$i]['name'], $newFileName)) {
      echo 'Moved file: ' . $newFileName . "\n";
    }
  }
}

Here’s what find returns after running the script on the capture directory full of sample .avis and .jpgs.

username@workstation:~/captures> find .
.
./2008-01-06
./2008-01-06/01
./2008-01-06/01/01-20080106145755-02.jpg
./2008-01-06/01/01-20080106145755-04.jpg
./2008-01-06/01/01-20080106145756-00.jpg
./2008-01-06/01/01-20080106145757-00.jpg
./2008-01-06/01/01-20080106145757-01.jpg
./2008-01-06/01/01-20080106145758-00.jpg
./2008-01-06/01/01-20080106145758-01.jpg
./2008-01-06/01/01-20080106145758-02.jpg
./2008-01-06/01/01-20080106145758-04.jpg
./2008-01-06/01/01-20080106145758-05.jpg
./2008-01-06/01/01-20080106145758-06.jpg
./2008-01-06/01/01-20080106145759-00.jpg
./2008-01-06/01/01-20080106145808-01.jpg
./2008-01-06/01-20080106145755.avi