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feat: add demo of GPT vision capabilities based on video stream
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‎assets/app.js‎

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@@ -4,4 +4,5 @@ import './styles/app.css';
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import './styles/audio.css';
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import './styles/blog.css';
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import './styles/youtube.css';
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import './styles/video.css';
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import './styles/wikipedia.css';

‎assets/controllers/video_controller.js‎

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import {Controller} from '@hotwired/stimulus';
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import {getComponent} from '@symfony/ux-live-component';
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export default class extends Controller {
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async initialize() {
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this.component = await getComponent(this.element);
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this.video = document.getElementById('videoFeed');
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this.canvas = document.getElementById('canvas');
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const input = document.getElementById('chat-message');
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input.addEventListener('keypress', (event) => {
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if (event.key === 'Enter') {
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this.submitMessage();
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}
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});
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input.focus();
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const submitButton = document.getElementById('chat-submit');
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submitButton.addEventListener('click', (event) => {
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this.submitMessage();
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});
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this.video.srcObject = await navigator.mediaDevices.getUserMedia({video: true, audio: false});
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};
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submitMessage() {
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const input = document.getElementById('chat-message');
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const instruction = input.value;
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const image = this.captureImage();
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this.component.action('submit', { instruction, image });
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input.value = '';
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}
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captureImage() {
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this.canvas.width = this.video.videoWidth;
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this.canvas.height = this.video.videoHeight;
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const context = this.canvas.getContext('2d');
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context.drawImage(this.video, 0, 0, this.canvas.width, this.canvas.height);
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return this.canvas.toDataURL('image/jpeg', 0.8);
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}
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}

‎assets/icons/tabler/video-filled.svg‎

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‎assets/styles/video.css‎

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.video {
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body&, .card-img-top {
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background: #26931e;
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background: linear-gradient(0deg, #186361 0%, #26931e 100%);
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}
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.card-img-top {
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color: #ffffff;
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}
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&.chat {
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#chat-submit {
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&:hover {
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background: #186361;
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border-color: #186361;
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}
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}
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}
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footer {
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color: #ffffff;
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a {
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color: #ffffff;
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}
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}
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}

‎config/routes.yaml‎

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@@ -25,6 +25,13 @@ youtube:
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template: 'chat.html.twig'
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context: { chat: 'youtube' }
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video:
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path: '/video'
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controller: 'Symfony\Bundle\FrameworkBundle\Controller\TemplateController'
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defaults:
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template: 'chat.html.twig'
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context: { chat: 'video' }
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wikipedia:
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path: '/wikipedia'
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controller: 'Symfony\Bundle\FrameworkBundle\Controller\TemplateController'

‎demo.png‎

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‎src/Video/TwigComponent.php‎

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<?php
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declare(strict_types=1);
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namespace App\Video;
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use PhpLlm\LlmChain\Bridge\OpenAI\GPT;
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use PhpLlm\LlmChain\Model\Message\Content\Image;
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use PhpLlm\LlmChain\Model\Message\Message;
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use PhpLlm\LlmChain\Model\Message\MessageBag;
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use PhpLlm\LlmChain\Model\Response\AsyncResponse;
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use PhpLlm\LlmChain\Model\Response\TextResponse;
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use PhpLlm\LlmChain\PlatformInterface;
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use Symfony\UX\LiveComponent\Attribute\AsLiveComponent;
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use Symfony\UX\LiveComponent\Attribute\LiveAction;
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use Symfony\UX\LiveComponent\Attribute\LiveArg;
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use Symfony\UX\LiveComponent\Attribute\LiveProp;
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use Symfony\UX\LiveComponent\DefaultActionTrait;
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#[AsLiveComponent('video')]
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final class TwigComponent
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{
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use DefaultActionTrait;
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#[LiveProp]
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public string $caption = 'Please define an instruction and hit submit.';
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public function __construct(
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private readonly PlatformInterface $platform,
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) {
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}
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#[LiveAction]
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public function submit(#[LiveArg] string $instruction, #[LiveArg] string $image): void
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{
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$messageBag = new MessageBag(
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Message::forSystem(<<<PROMPT
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You are a video captioning assistant. You are provided with a video frame and an instruction.
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You must generate a caption or answer based on the provided video frame and the user's instruction.
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You are not in a conversation with the user and there will be no follow-up questions or messages.
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PROMPT),
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Message::ofUser($instruction, Image::fromDataUrl($image))
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);
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$response = $this->platform->request(new GPT(GPT::GPT_4O_MINI), $messageBag, [
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'max_tokens' => 100,
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]);
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assert($response instanceof AsyncResponse);
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$response = $response->unwrap();
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assert($response instanceof TextResponse);
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$this->caption = $response->getContent();
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}
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}

‎templates/base.html.twig‎

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<li class="nav-item">
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<a class="nav-link" href="{{ path('audio') }}">{{ ux_icon('iconoir:microphone-solid', { height: '20px', width: '20px' }) }} Audio Bot</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="{{ path('video') }}">{{ ux_icon('tabler:video-filled', { height: '20px', width: '20px' }) }} Video Bot</a>
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</li>
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<li class="nav-item"><span class="nav-link">|</span></li>
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<li class="nav-item">
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<a class="nav-link" href="https://github.com/php-llm/symfony-demo" target="_blank">{{ ux_icon('mdi:github', { height: '20px', width: '20px' }) }} GitHub</a>

‎templates/components/video.html.twig‎

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{% import "_message.html.twig" as message %}
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<div class="card mx-auto shadow-lg" {{ attributes.defaults(stimulus_controller('video')) }}>
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<div class="card-header p-2">
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{{ ux_icon('tabler:video-filled', { height: '32px', width: '32px' }) }}
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<strong class="ms-1 pt-1 d-inline-block">Video Bot</strong>
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</div>
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<div id="chat-body" class="card-body p-2 overflow-auto">
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<div id="welcome" class="text-center mt-5 p-4 bg-white rounded-5 shadow-sm w-75 mx-auto">
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<div class="mb-2">
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<video id="videoFeed" autoplay playsinline></video>
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</div>
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<canvas id="canvas" class="d-none"></canvas>
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<i class="text-muted">{{ this.caption }}</i>
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</div>
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</div>
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<div class="card-footer p-2">
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<div class="input-group">
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<input id="chat-message" type="text" class="form-control border-0" placeholder="What do you see?">
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<button id="chat-submit" class="btn btn-outline-secondary border-0" type="button">{{ ux_icon('mingcute:send-fill', { height: '25px', width: '25px' }) }} Submit</button>
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</div>
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</div>
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</div>

‎templates/index.html.twig‎

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</p>
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<h3 class="text-dark">Examples</h3>
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<div class="row">
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<div class="col-md-3">
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<div class="col-md-4">
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<div class="card blog bg-body shadow-sm">
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<div class="card-img-top py-2">
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{{ ux_icon('mdi:symfony', { height: '150px', width: '150px' }) }}
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{% endif %}
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</div>
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</div>
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<div class="col-md-3">
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<div class="col-md-4">
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<div class="card youtube bg-body shadow-sm">
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<div class="card-img-top py-2">
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{{ ux_icon('bi:youtube', { height: '150px', width: '150px' }) }}
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{% endif %}
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</div>
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</div>
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<div class="col-md-3">
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<div class="col-md-4">
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<div class="card wikipedia bg-body shadow-sm">
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<div class="card-img-top py-2">
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{{ ux_icon('mdi:wikipedia', { height: '150px', width: '150px' }) }}
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{% endif %}
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</div>
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</div>
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<div class="col-md-3">
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</div>
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<div class="row mt-4">
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<div class="col-md-2"></div>
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<div class="col-md-4">
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<div class="card audio bg-body shadow-sm">
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<div class="card-img-top py-2">
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{{ ux_icon('iconoir:microphone-solid', { height: '150px', width: '150px' }) }}
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</div>
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<div class="card-body">
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<h5 class="card-title">Audio Bot</h5>
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<p class="card-text">Simple demonstration of text-to-speech with Whisper in combination with GPT.</p>
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<p class="card-text">Simple demonstration of speech-to-text with Whisper in combination with GPT.</p>
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<a href="{{ path('audio') }}" class="btn btn-outline-dark d-block">Try Audio Bot</a>
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</div>
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{# Profiler route only available in dev #}
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{% endif %}
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</div>
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</div>
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<div class="col-md-4">
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<div class="card video bg-body shadow-sm">
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<div class="card-img-top py-2">
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{{ ux_icon('tabler:video-filled', { height: '150px', width: '150px' }) }}
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</div>
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<div class="card-body">
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<h5 class="card-title">Video Bot</h5>
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<p class="card-text">Simple demonstration of vision capabilities of GPT in combination with your webcam.</p>
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<a href="{{ path('video') }}" class="btn btn-outline-dark d-block">Try Video Bot</a>
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</div>
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{# Profiler route only available in dev #}
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{% if 'dev' == app.environment %}
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<div class="card-footer">
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{{ ux_icon('solar:code-linear', { height: '20px', width: '20px' }) }}
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<a href="{{ path('_profiler_open_file', { file: 'src/Video/TwigComponent.php', line: 37 }) }}">See Implementation</a>
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</div>
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{% endif %}
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</div>
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</div>
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<div class="col-md-2"></div>
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</div>
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</div>
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{% endblock %}

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