record framebuffer tty action to video.

/usr/share/doc/libjpeg8-dev/libjpeg.txt.gz
	Allocate and initialize a JPEG compression object
	Specify the destination for the compressed data (eg, a file)
	Set parameters for compression, including image size & colorspace
	jpeg_start_compress(...);
	while (scan lines remain to be written)
		jpeg_write_scanlines(...);
	jpeg_finish_compress(...);
	Release the JPEG compression object