大全景到平移视频 [英] Large Panorama to Panning Video

问题描述

从全景图像创建视频的最有效方法是什么，例如，其尺寸为: 5000宽x 600高度 px?

What would be the most efficient way to create a video from a panoramic image that would for example have the size: 5000 width x 600 height px?

我创建了这个GIF图像，可以更好地解释事情.想象一下，视频将位于红色边框内.因此视频可能会从左向右平移.

I created this GIF image that would explain things a bit better. Imagine that the video would be inside the red border. So the video would potentially be panning from left to right.

推荐答案

在ffmpeg中，移动作物是实现此目标的最便捷方法.

A moving crop is the most convenient way to achieve this in ffmpeg.

ffmpeg -loop 1 -i in.jpg -vf crop=500:ih:'min((iw/10)*t,9*iw/10)':0 -t 10 pan.mp4

农作物过滤器的尺寸为500 x ih，即500x600.裁剪窗口的左上角坐标固定为Y = 0.对于X，表达式为 min((iw/10)* t，9 * iw/10)，即每秒钟，裁剪窗口将在图像宽度的10％范围内滑动.因此，在t = 9时，裁剪窗口覆盖了示例图像的(4500,0)至(5000,600).从那时起，min函数将返回另一个值 9 * iw/10 = 4500 ，并且滑动停止.

The crop filter crops to a size of 500 x ih i.e. 500x600. The top-left co-ordinate of the cropping window is fixed to Y=0. For X, the expression is min((iw/10)*t,9*iw/10) i.e. in each second, the cropping window will slide across 10% of the image width. So, at t=9, the cropping window covers (4500,0) to (5000,600) for the example image. From that time, the min function returns the other value 9*iw/10 = 4500 and the sliding stops.

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