There is extract_images node in image_view that does exactly the same as image_view node, but instead of showing an image it saves it to a jpg file. I believe Patrick wrote image_saver (also in image_view) that does something similar. I suggest this functionality should reside somewhere in rxbag. 

Best Regards, Victor

On May 31, 2010, at 10:05 AM, Kurt Konolige wrote:

> Hmm, that's a little old, and only works for the old topic "raw_stereo", 
> which doesn't exist in current ROS.  I can probably munge it to work 
> with new topics, though.
> 
> Cheers --Kurt
> 
> On 5/30/2010 9:09 PM, Jeremy Leibs wrote:
>> I have not used it, but there is a script called "bag2png.py" in
>> rosrecord.  I expect it will do what you want.
>> 
>> On Sun, May 30, 2010 at 9:06 PM, Kurt Konolige
>> <konolige@willowgarage.com>  wrote:
>>> Sorry if this has already been covered -
>>> 
>>> Any way to take the images from a bag file and put them into normal
>>> PNG-type files in a directory?
>>> 
>>> Cheers --Kurt
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