The problem with gzipping an entire bag file is you lose the ability to do random access.  We&#39;re working on a new bag format for rosbag which internally uses compression and permits random access.  This is slated for ROS 1.1.3.<br>

<br>For images, one option to consider is storing CompressedImage messages in your bag files (see compressed_image_transport).  A domain specific compression algorithm is always going to beat a generic one such as gzip.<br>

<br>Tim<br><br><div class="gmail_quote">On Sat, Apr 10, 2010 at 5:22 PM, Jack O&#39;Quin <span dir="ltr">&lt;<a href="mailto:jack.oquin@gmail.com">jack.oquin@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">

Is there a rosbag option to read and write gzipped bag files?<br>
<br>
That would be useful. With images and point clouds bags can get really<br>
large, and gzip can compress them quite a lot.<br>
<font color="#888888">--<br>
 joq<br>
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