ARCore:如何在检测到图像时在相框中播放视频 [英] ARCore: How to play video in the photo frame when an image detected

问题描述

我想在检测到图像时在相框中播放视频，有人用 ARCore 做过吗?会有很大帮助

I want to play video in in photo frame when image is detected, anybody who have done this using ARCore? would be great help

谢谢

推荐答案

我想您的意思是您想在 ARCore 中添加视频作为可渲染对象，在您检测到图像的情况下.

I think you mean you want to add a video as a renderable in ARCore, in your case when an image is detected.

实际上(在撰写本文时)Sceneform 中包含一个示例，展示了如何将视频添加为可渲染的 - 可在此处获得:https://github.com/google-ar/sceneform-android-sdk/tree/master/samples/chromakeyvideo

There is actually (at the time of writing) an example included with Sceneform showing how to add a video as a renderable - it is available here: https://github.com/google-ar/sceneform-android-sdk/tree/master/samples/chromakeyvideo

此特定示例还应用了色度过滤器，但您可以简单地忽略该部分.

This particular example also applies a Chroma filter but you can simply ignore that part.

做法大致是:

• 创建一个 ExternalTexture 来播放视频
• 创建一个 MediaPlayer 并将其表面设置为 ExternalTexture 的表面
• 使用 ExternalTexture 构建一个新的可渲染对象
• 创建一个节点并将其添加到您的场景中
• 将节点的可渲染对象设置为您构建的新 ModelRenderable

对于增强图像，只要图像的状态为正在跟踪"，ArCore 就会自动计算它检测到的图像的大小.来自文档:

For Augmented images, ArCore will automatically calculate the size of the image that it detects so long as the state of the image is 'TRACKING". From the documentation:

ARCore 将尝试根据其对世界的理解来估计物理图像的宽度.如果在数据库中指定了可选的物理尺寸，则此估计过程将更快地进行.但是，估计尺寸可能与指定尺寸不同.

ARCore will attempt to estimate the physical image's width based on its understanding of the world. If the optional physical size is specified in the database, this estimation process will happen more quickly. However, the estimated size may be different from the specified size.

默认情况下，您的可渲染对象的大小将适合它，但您也可以根据需要向上或向下缩放可渲染对象.

Your renderable will be sized to fit inside this by default but you can scale the renderable up or down as you want also.

有一系列可用的文章可能涵盖您的具体情况，具体取决于您的需要，以及此处的一些示例代码:https://proandroiddev.com/arcore-sceneform-simple-video-playback-3fe2f909bfbc

There is a series of articles available which may cover your exact case, depending on exactly what you need, along with some example code here: https://proandroiddev.com/arcore-sceneform-simple-video-playback-3fe2f909bfbc

这篇关于ARCore:如何在检测到图像时在相框中播放视频的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！