CoderFunda
  • Home
  • About us
    • Contact Us
    • Disclaimer
    • Privacy Policy
    • About us
  • Home
  • Php
  • HTML
  • CSS
  • JavaScript
    • JavaScript
    • Jquery
    • JqueryUI
    • Stock
  • SQL
  • Vue.Js
  • Python
  • Wordpress
  • C++
    • C++
    • C
  • Laravel
    • Laravel
      • Overview
      • Namespaces
      • Middleware
      • Routing
      • Configuration
      • Application Structure
      • Installation
    • Overview
  • DBMS
    • DBMS
      • PL/SQL
      • SQLite
      • MongoDB
      • Cassandra
      • MySQL
      • Oracle
      • CouchDB
      • Neo4j
      • DB2
      • Quiz
    • Overview
  • Entertainment
    • TV Series Update
    • Movie Review
    • Movie Review
  • More
    • Vue. Js
    • Php Question
    • Php Interview Question
    • Laravel Interview Question
    • SQL Interview Question
    • IAS Interview Question
    • PCS Interview Question
    • Technology
    • Other

20 April, 2023

Laravel FFMpeg tools

 Programing Coderfunda     April 20, 2023     Laravel     No comments   

This package allows you to build FFMpeg strings in a fluent, easily maintainable way that feels familiar to php and Laravel devs. The post Laravel FFMpeg tools appeared first on Laravel News. Join the Laravel Newsletter to get Laravel articles like this directly in your inbox. ---


Here's the final shell command that will generate that video:

ffmpeg -y -f lavfi -i "color=c=black:s=256x256:d=1" -filter_complex "[0:v] loop=-1:1 [bg]; [bg] drawtext=text='Motion Tween':fontcolor=white:x=(main_w/2)-(tw/2):y=if(gt(t\,4)\,if(lt(t\,4)\,((main_h/2)-(th/2))\,if(gt(t\,4+2)\,(main_h)\,((main_h/2)-(th/2))+(((main_h)-((main_h/2)-(th/2)))*(if(eq(((t-4)/2)\,0)\,0\,if(eq(((t-4)/2)\,1)\,1\,-pow(2\,10*((t-4)/2)-10)*sin((((t-4)/2)*10-10.75)*2.0943951023932)))))))\,if(lt(t\,1)\,(-th)\,if(gt(t\,1+2)\,((main_h/2)-(th/2))\,(-th)+((((main_h/2)-(th/2))-(-th))*(if(lt(((t-1)/2)\, 1/2.75)\,7.5625*pow(((t-1)/2)\,2)\,if(lt(((t-1)/2)\,2/2.75)\,7.5625*(((t-1)/2)-1.5/2.75)*(((t-1)/2)-1.5/2.75)+0.75\,if(lt(((t-1)/2)\,2.5/2.75)\,7.5625*(((t-1)/2)-2.25/2.75)*(((t-1)/2)-2.25/2.75)+0.9375\,7.5625*(((t-1)/2)-2.65/2.75)*(((t-1)/2)-2.65/2.75)+0.984375))))))))" -codec:a copy -codec:v libx264 -crf 25 -pix_fmt yuv420p -t 8 drawtext_y_enter-OutBounce_exit-InElastic.mp4

I can break this down further if people are interested, but really we're only concerned about the y parameter of the drawtext video filter.

if(gt(t\,4)\,if(lt(t\,4)\,((main_h/2)-(th/2))\,if(gt(t\,4+2)\,(main_h)\,((main_h/2)-(th/2))+(((main_h)-((main_h/2)-(th/2)))*(if(eq(((t-4)/2)\,0)\,0\,if(eq(((t-4)/2)\,1)\,1\,-pow(2\,10*((t-4)/2)-10)*sin((((t-4)/2)*10-10.75)*2.0943951023932)))))))\,if(lt(t\,1)\,(-th)\,if(gt(t\,1+2)\,((main_h/2)-(th/2))\,(-th)+((((main_h/2)-(th/2))-(-th))*(if(lt(((t-1)/2)\, 1/2.75)\,7.5625*pow(((t-1)/2)\,2)\,if(lt(((t-1)/2)\,2/2.75)\,7.5625*(((t-1)/2)-1.5/2.75)*(((t-1)/2)-1.5/2.75)+0.75\,if(lt(((t-1)/2)\,2.5/2.75)\,7.5625*(((t-1)/2)-2.25/2.75)*(((t-1)/2)-2.25/2.75)+0.9375\,7.5625*(((t-1)/2)-2.65/2.75)*(((t-1)/2)-2.65/2.75)+0.984375))))))))

What we're doing here with the y position is initializing it just out of the top of the frame, waiting one second, transitioning it to the center of the frame over 2 seconds with an easing of EaseOutBounce, holding that position for 1 second, then transitioning to just outside the bottom of the frame with an easing of EaseInElastic over 2 seconds, and keeping it there until the video ends.

This description might not sound that tough, but let's take a quick look at the math for one of these easing functions, and see what we need to do to get that plugged into ffmpeg.

Here's the function in typescript and the resulting plot for EaseOutBounce (from Easings.net)

function easeOutBounce(x: number): number {
const n1 = 7.5625;
const d1 = 2.75;
 
if (x < 1 / d1) {
return n1 * x * x;
} else if (x < 2 / d1) {
return n1 * (x -= 1.5 / d1) * x + 0.75;
} else if (x < 2.5 / d1) {
return n1 * (x -= 2.25 / d1) * x + 0.9375;
} else {
return n1 * (x -= 2.625 / d1) * x + 0.984375;
}
}

Note We're reassigning x inside these conditionals.

All this function does is take in a number between 0 and 1 that represents our absolute progress through an animation, and gives us a different number between 0 and 1. We then use that number multiplied against our delta to calculate our value at this point of our animation, or tween.

First let's lay out a couple constants to which we have access in the drawtext filter:

  • t = current time in seconds for the frame being generated
  • th = text height
  • main_h = height of the video frame

To get x (our absolute progress through this animation), it's going to be the current time (t) minus delay (1), over duration (2). In FFMpeg-speak, that's (t-1)/2. This is because while normally we would do t/duration, we have to account for the delay by subtracting it from the numerator of our fraction.

Now is the super gross part. We have to turn that pretty simple ts function into an FFMpeg function, and replace every reference to x with ours. To do this, we're going need three FFMpeg functions: if, lt (less than), and pow. Because we're reassigning the time value (x) in these conditionals, we're just going to make them separately beforehand. Here's a PHP function with the terms all premade, then concatenated to form the easing string:

public static function EaseOutBounce(string $time): string
{
$n1 = 7.5625;
$d1 = 2.75;
$firstExpr = "{$n1}*pow(({$time})\\,2)";
$secondTime = "(({$time})-1.5/{$d1})";
$secondExpr = "{$n1}*{$secondTime}*{$secondTime}+0.75";
$thirdTime = "(({$time})-2.25/{$d1})";
$thirdExpr = "{$n1}*{$thirdTime}*{$thirdTime}+0.9375";
$fourthTime = "(({$time})-2.65/{$d1})";
$fourthExpr = "{$n1}*{$fourthTime}*{$fourthTime}+0.984375";
 
return "if(lt(({$time})\\, 1/{$d1})\\,{$firstExpr}\\,if(lt(({$time})\\,2/{$d1})\\,{$secondExpr}\\,if(lt(({$time})\\,2.5/{$d1})\\,{$thirdExpr}\\,{$fourthExpr})))";
}

Running our x value of (t-1)/2 through this function gives us this output:

if(lt(((t-1)/2)\, 1/2.75)\,7.5625*pow(((t-1)/2)\,2)\,if(lt(((t-1)/2)\,2/2.75)\,7.5625*(((t-1)/2)-1.5/2.75)*(((t-1)/2)-1.5/2.75)+0.75\,if(lt(((t-1)/2)\,2.5/2.75)\,7.5625*(((t-1)/2)-2.25/2.75)*(((t-1)/2)-2.25/2.75)+0.9375\,7.5625*(((t-1)/2)-2.65/2.75)*(((t-1)/2)-2.65/2.75)+0.984375)))

This is our ease.

To get our delta, we use our initial position (from) of -th (just outside the top of the frame), and our final position (to) of (main_h/2)-(th/2) (the vertical center of the frame). That gives us a delta of ((main_h/2)-(th/2))-(-th)

For our final step in this tween, we're going to tell ffmpeg that if t is less than the delay, to use our from value, if t is greater than our delay plus our duration to use the to value, or else add our from value to our delta multiplied by our ease.

public function build(): string
{
return "if(lt(t\,{$this->delay})\,{$this->from}\,if(gt(t\,{$this->delay}+{$this->duration})\,{$this->to}\,{$this->from}+({$this->getDelta()}*{$this->ease})))";
}

This gives us this final string for this specific part of the animation:

if(lt(t\,1)\,(-th)\,if(gt(t\,1+2)\,((main_h/2)-(th/2))\,(-th)+((((main_h/2)-(th/2))-(-th))*(if(lt(((t-1)/2)\, 1/2.75)\,7.5625*pow(((t-1)/2)\,2)\,if(lt(((t-1)/2)\,2/2.75)\,7.5625*(((t-1)/2)-1.5/2.75)*(((t-1)/2)-1.5/2.75)+0.75\,if(lt(((t-1)/2)\,2.5/2.75)\,7.5625*(((t-1)/2)-2.25/2.75)*(((t-1)/2)-2.25/2.75)+0.9375\,7.5625*(((t-1)/2)-2.65/2.75)*(((t-1)/2)-2.65/2.75)+0.984375)))))))

There must be a better way

Well I'm glad you asked.

Enter projektgopher/laravel-ffmpeg-tools - the package I've been itching to tell you about.

With this package, generating this string is as easy as

(new Tween())
->from("-th")
->to("(main_h/2)-(th/2)")
->delay(Timing::seconds(1))
->duration(Timing::seconds(2))
->ease(Ease::OutBounce);

But we didn't just have this one tween to get to our final y value for our drawtext filter at the beginning of the post. This is where Timelines and Keyframes come in.

Here's a portion of the generateTimeline testing script from this package that I used to make that first video:

use ProjektGopher\FFMpegTools\Timeline;
use ProjektGopher\FFMpegTools\Keyframe;
use ProjektGopher\FFMpegTools\Ease;
use ProjektGopher\FFMpegTools\Timing;
 
echo 'Generating video sample using Timeline...'.PHP_EOL;
 
$timeline = new Timeline();
$timeline->keyframe((new Keyframe())
->value('-th')
->hold(Timing::seconds(1))
);
$timeline->keyframe((new Keyframe())
->value('(main_h/2)-(th/2)')
->ease(Ease::OutBounce)
->duration(Timing::seconds(2))
->hold(Timing::seconds(1))
);
$timeline->keyframe((new Keyframe())
->value('main_h')
->ease(Ease::InElastic)
->duration(Timing::seconds(2))
);
 
$input = "-f lavfi -i \"color=c=black:s=256x256:d=1\"";
$filter = "-filter_complex \"[0:v] loop=-1:1 [bg]; [bg] drawtext=text='Motion Tween':fontcolor=white:x=(main_w/2)-(tw/2):y={$timeline}\"";
$codecs = '-codec:a copy -codec:v libx264 -crf 25 -pix_fmt yuv420p';
$duration = '-t 8'; // in seconds
$out = "tests/Snapshots/Timelines/drawtext_y_enter-OutBounce_exit-InElastic.mp4";
$redirect = '2>&1'; // redirect stderr to stdout
 
$cmd = "ffmpeg -y {$input} {$filter} {$codecs} {$duration} {$out} {$redirect}";

You can install the package via composer:

composer require projektgopher/laravel-ffmpeg-tools

The current version at the time of this writing is v0.5.0

Extra

shell cmd for plot

Here's a slightly modified portion of the generateEasings testing script to generate the plot for EaseOutBounce from the middle of this post:

// $ease->value = "OutBounce";
echo "Generating snapshot for {$ease->value} easing...".PHP_EOL;
$time = "X/H";
$easeMultiplier = Ease::{$ease->value}($time);
$input = "-f lavfi -i \"color=c=black:s=256x256:d=1\"";
$margin = '28';
$filter = "-vf \"geq=if(eq(round((H-2*{$margin})*({$easeMultiplier}))\,H-Y-{$margin})\,128\,0):128:128\"";
$out = "-frames:v 1 -update 1 tests/Snapshots/Easings/{$ease->value}.png";
$redirect = '2>&1'; // redirect stderr to stdout
 
$cmd = "ffmpeg -y {$input} {$filter} {$out} {$redirect}";

The 'interesting' thing here is that our $time value isn't tied to t but rather the x axis of our plot.

  • Share This:  
  •  Facebook
  •  Twitter
  •  Google+
  •  Stumble
  •  Digg
Email ThisBlogThis!Share to XShare to Facebook
Newer Post Older Post Home

0 comments:

Post a Comment

Thanks

Meta

Popular Posts

  • Sitaare Zameen Par Full Movie Review
     Here’s a  complete Vue.js tutorial for beginners to master level , structured in a progressive and simple way. It covers all essential topi...
  • AI foot tracking model
    I am a student doing a graduation project. I urgently need to deal with this model (I am attaching a link). I've never worked with pytho...
  • Laravel Search String
      Laravel Search String is a package by   Loris Leiva   that generates database queries based on one unique string using a simple and custom...
  • Writing and debugging Eloquent queries with Tinkerwell
    In this article, let's look into the options that you can use with Tinkerwell to write and debug Eloquent queries easier. The post Wr...
  • Laravel - Installation
    For managing dependencies, Laravel uses   composer . Make sure you have a Composer installed on your system before you install Laravel. In t...

Categories

  • Ajax (26)
  • Bootstrap (30)
  • DBMS (42)
  • HTML (12)
  • HTML5 (45)
  • JavaScript (10)
  • Jquery (34)
  • Jquery UI (2)
  • JqueryUI (32)
  • Laravel (1017)
  • Laravel Tutorials (23)
  • Laravel-Question (6)
  • Magento (9)
  • Magento 2 (95)
  • MariaDB (1)
  • MySql Tutorial (2)
  • PHP-Interview-Questions (3)
  • Php Question (13)
  • Python (36)
  • RDBMS (13)
  • SQL Tutorial (79)
  • Vue.js Tutorial (69)
  • Wordpress (150)
  • Wordpress Theme (3)
  • codeigniter (108)
  • oops (4)
  • php (853)

Social Media Links

  • Follow on Twitter
  • Like on Facebook
  • Subscribe on Youtube
  • Follow on Instagram

Pages

  • Home
  • Contact Us
  • Privacy Policy
  • About us

Blog Archive

  • July (4)
  • September (100)
  • August (50)
  • July (56)
  • June (46)
  • May (59)
  • April (50)
  • March (60)
  • February (42)
  • January (53)
  • December (58)
  • November (61)
  • October (39)
  • September (36)
  • August (36)
  • July (34)
  • June (34)
  • May (36)
  • April (29)
  • March (82)
  • February (1)
  • January (8)
  • December (14)
  • November (41)
  • October (13)
  • September (5)
  • August (48)
  • July (9)
  • June (6)
  • May (119)
  • April (259)
  • March (122)
  • February (368)
  • January (33)
  • October (2)
  • July (11)
  • June (29)
  • May (25)
  • April (168)
  • March (93)
  • February (60)
  • January (28)
  • December (195)
  • November (24)
  • October (40)
  • September (55)
  • August (6)
  • July (48)
  • May (2)
  • January (2)
  • July (6)
  • June (6)
  • February (17)
  • January (69)
  • December (122)
  • November (56)
  • October (92)
  • September (76)
  • August (6)

Loading...

Laravel News

Loading...

Copyright © CoderFunda | Powered by Blogger
Design by Coderfunda | Blogger Theme by Coderfunda | Distributed By Coderfunda