如何在Linux帧缓冲区上截屏截图或电影

Question

How can the linux frame buffer, on Cell Linux, be captured to obtain either screen shots or movies?

Is there a tool to do this for a running program, or must the program writing to, and presumably controlling, the frame buffer also handle capture and recording? If so, how would the program do so?

Answer 1

Many tools for doing so, for example FBGrab and fbdump ; look at the sources for those two, it would be pretty easy to extend either one or write your own which captures video instead of just snapshots.

However, I would recommend that the program writing to the framebuffer be the one recording as well, in order to synchronize capturing frames between writing them (and not partially through a write, or skipping, or ...)

Answer 2

您可以使用ffmpeg或avconv （例如avconv -f fbdev -i /dev/fb0 mymovie.flv ）。