c# - 如何使用 Directshow.Net 放大（缩放）视频的一部分并将其覆盖在原始视频上

Question

我目前使用directshow.net 开发了一个媒体播放器。视频在左上角有一个小时间戳，非常小。我需要放大它，以便在视频播放时它是可见/可读的。

我试过使用：

IVMRFilterConfig
IVMRMixerControl

并播放相同视频的两个窗口，但我似乎无法放大一个窗口并仅显示时间戳部分。

还有其他方法可以实现吗？

谢谢。

Answer 1

I have solved (sort of) my problem by letting two independant video windows run at the same time. Thus window1 displays the whole image and window2 is a small window in the corner of the screen and it only displays the date time zoomed in.

I just had to make sure they play and stop at the same time and when I used frame skips, that both videos are treated.