Easily deal with SMPTE Timecode format in PHP. If you need a Javascript lib, check out fireworkweb/smpte.js.

You can install the package via composer:

composer require fireworkweb/smpte

Include the Timecode or Validations classes:

use FireworkWeb\SMPTE\Timecode;
use FireworkWeb\SMPTE\Validations;

You can instantiate it directly using new:

// passing frame count
$timecode = new Timecode(360);

// passing a timecode string
$timecode = new Timecode('00:00:01:10');

// passing a Datetime object
$timecode = new Timecode(new \DateTime('01:34:12'));

Or you can use the static helper:

$timecode = Timecode::fromSeconds(10);

• $time: int|String|Timecode time to start with.
• $frameRate: float frame rate to calculate the timecode.
• $dropFrame: bool indicates if is drop frame. ONLY WITH 29.97 FPS

$time as int is the frame count to be setted with. To deal with seconds, use fromSeconds.

Note: if $frameRate or $dropFrame are null, it will use the default.

Returns a timecode string representation.

(new Timecode(360))->toString();
// "00:00:15:00"

Adds a timecode or a frame count to the current Timecode object.

• $time: int|String|Timecode indicating the value to be added.
• $operation: int used to get the sign of time.
• return: Timecode Reference to the Timecode object.

$tc = new Timecode('00:01:00:00');

// Adding from string
$tc->add('00:00:30:00')->toString();
// 00:01:30:00

// Adding frame count
$tc->add(1)->toString();
// 00:01:30:01

// Adding from another object
$tc2 = new Timecode('00:01:00:00');
$tc->add($tc2)->toString();
// 00:02:30:01

Substracts a timecode or a frame count to the current Timecode object.

• $time: int|String|Timecode indicating the value to be added.
• return: Timecode Reference to the Timecode object.

$tc = new Timecode('00:03:00:00');

// Subtracting from string
$tc->subtract('00:00:30:00')->toString();
// 00:02:30:00

// Subtracting frame count
$tc->subtract(1)->toString();
// 00:02:29:23

// Subtracting from another object
$tc2 = new Timecode('00:01:00:00');
$tc->subtract($tc2)->toString();
// 00:01:29:23

Directly set object hours.

• $hours: int indicating the value to be setted.

$tc = new Timecode('00:03:00:00');
$tc->setHours(1)->toString();
// 01:03:00:00

Directly set object minutes.

• $minutes: int indicating the value to be setted.

$tc = new Timecode('00:03:00:00');
$tc->setMinutes(1)->toString();
// 00:01:00:00

Directly set object seconds.

• $seconds: int indicating the value to be setted.

$tc = new Timecode('00:03:00:00');
$tc->setSeconds(1)->toString();
// 00:03:01:00

Directly set object frames.

• $frames: int indicating the value to be setted.

$tc = new Timecode('00:03:00:00');
$tc->setFrames(1)->toString();
// 00:03:00:01

Directly set object frame count. This will recalculate all other attributes, so use it with care.

• $frameCount: int indicating the value to be setted.

$tc = new Timecode('00:03:00:00');
$tc->setFrameCount(360)->toString();
// 00:00:15:00

Returns the frame count from a time.

• $time: String time as string to calculate.
• $frameRate: float frame rate to calculate the timecode.
• $dropFrame: bool indicates if is drop frame.
• return: int returns the frame count

Instantiate a new object from seconds instead of timecode/framecount.

• $seconds: int seconds to convert
• $frameRate: float frame rate to calculate the timecode.
• $dropFrame: bool indicates if is drop frame.
• return: Timecode Returns the newly created object

$tc = Timecode::fromSeconds(15);
$tc->toString();
// 00:00:15:00

Change default frame rate to instantiate objects with.

• $frameRate: float New default frame rate.

$tc = new Timecode();
$tc->getFrameRate();
// 24

Timecode::setDefaultFrameRate(25);

$tc2 = new Timecode();
$tc2->getFrameRate();
// 25

Change default drop frame to instantiate objects with.

• $dropFrame: float New default drop frame.

$tc = new Timecode();
$tc->getDropFrame();
// false

Timecode::setDefaultDropFrame(true);

$tc2 = new Timecode();
$tc2->getDropFrame();
// true

All contribution is welcome, please feel free to open tickets and pull requests.

MIT.