[android-developers] saving camera preview frames to a file with minimum slow-down

hi list

I'd like to get some advice on optimizing file IO of a camera-frame
processing code I am working on.

I used the setPreviewCallbackWithBuffer() method to capture each
preview frame and do some processing in the real-time. The processed
frame (an int array) is then save to the sdcard. I found that by
commenting out the file io block, my frame rate can go up to 30fps for
a 512x512 preview size. However, with the data saving, the frame rate
is only around 10 fps or less.

Any suggestions to speed up this?

Qianqian

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