Ah, silly me. Not sure how I overlooked that part of the docs. Thanks!

On Wed, Mar 31, 2010 at 4:28 PM, Patrick Mihelich
<mihelich@willowgarage.com> wrote:
> On Wed, Mar 31, 2010 at 3:04 PM, Patrick Bouffard
> <patrick.m.bouffard@gmail.com> wrote:
>>
>> Now normally if I start
>> image_view manually and click on the window it will save frames to the
>> current directory. But it seems like if it's started in a launch file,
>> the image isn't saved anywhere.
>
> It should be saved to $ROS_ROOT.
>
>> So my question is, is there any quick way to specify a specific
>> directory (that I have write access to) to image_view when it is
>> started via a launch file?
>
> Yes, you can set the ~filename_format parameter prefixed with an absolute
> path. From the command line:
>
> $ image_view image:=my_image_topic
> _filename_format:=/my_absolute_path/frame%04i.jpg
>
> You can also use that parameter to change the naming and image format. All
> the parameters are documented at
> http://www.ros.org/wiki/image_view#image_view-1.
>
> -Patrick
>
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