[lk] My Linux Blog - Capturing images in Android framebuffer

[Peter Teoh]

http://my.opera.com/otaku_2r/blog/grab-a-frame-in-android-frame-buffer Capturing images in Android framebuffer Thursday, 21. January 2010, 02:24:14 ffmpeg, capture, android, rgb565, framebuffer, png, raw Grab the raw image from the Android frame buffer using ADB $ adb shell # cat /dev/graphics/fb0 > /sdcard/frame.raw # exit After capturing the RAW data from the frame buffer of Android, I want to see the result in a common image format so I convert it to PNG by using FFMPEG. Currently Android is using RGB565 format. $ IMAGE_RES=320x480 $ RAW_IMAGE=frame.raw $ OUT_IMAGE=frame-%d.png $ #Download the raw data $ adb pull /sdcard/$RAW_IMAGE . $ ffmpeg -vcodec rawvideo -f rawvideo -pix_fmt rgb565 -s $IMAGE_RES \ -i $RAW_IMAGE -f image2 -vcodec png $OUT_IMAGE Normally, you will get two frames (frame-1.png and frame-2.png), cuz' Android is using double buffering.   -- Subscription settings: http://groups.google.com/group/linuxkernelnewbies/subscribe?hl=en