使用 ffmpeg 我可以用一些静止图像, 并将其转换成视频。 我想这样做来减少我所有时间折叠照片的总大小。 但我也想提取这些静止图像, 以便在稍后的日期使用 。
In order to use this method: - I will need to correlate the original still image against a frame number in the video. - And I will need to extract a thumbnail of a given frame number in a video.
但在我进入这个兔子洞之前, 我想知道这些要求 是否可以使用 ffmpeg, 如果可以的话, 任何关于如何完成这项任务的暗示。
注意:静态图像从一个摄像头一天的时间折叠,因此与堆积的jpegs相比,时间压缩是可以测量的。
当您使用 ffmpeg 从图像序列中创建视频时, 图像不会受到任何影响。 您仍然应该能够使用它们来完成您想要做的事情, 除非我误解您的问题 。
编辑 : 您可以使用 ffmpeg 从已有的视频中创建图像 。 我不确定它能对您有用, 但是图像质量相当高, 如果与原始图像不同的话。 您需要玩它, 才能确保提取的图像与输入图像在顺序顺序和命名方面完全相同, 但是如果您考虑到 fps, 它应该起作用 。
这样做的命令(来自ffmpeg < a href="http://ffmpeg.org/faq.html#How-do-I-encode-movie-to-single-pictures_003f" rel=“nofollow” > document )如下:
ffmpeg - i 电影.mpg 电影 %d.jpg
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