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I have written a really simple script to output ros topics to a text file. you can find the script here

for example, we need the timestamp, width and height of sensor_msgs::PointCloud2;

$ ./topics_to_ssv -d " " hoge.ssv /camera/depth/points2/header/stamp/secs /camera/depth/points2/header/stamp/nsecs /camera/depth/points2/width /camera/depth/points2/height
$ cat hoge.ssv
/camera/depth/points2/header/stamp/secs /camera/depth/points2/header/stamp/nsecs /camera/depth/points2/width /camera/depth/points2/height 
1297944909 267601871 640 480 
1297944909 310369177 640 480 
...

I hope it help you...

I have written a really simple script to output ros topics to a text file. you can find the script herehere; http://https://gist.github.com/831611

for example, we need the timestamp, width and height of sensor_msgs::PointCloud2;

$ ./topics_to_ssv -d " " hoge.ssv /camera/depth/points2/header/stamp/secs /camera/depth/points2/header/stamp/nsecs /camera/depth/points2/width /camera/depth/points2/height
$ cat hoge.ssv
/camera/depth/points2/header/stamp/secs /camera/depth/points2/header/stamp/nsecs /camera/depth/points2/width /camera/depth/points2/height 
1297944909 267601871 640 480 
1297944909 310369177 640 480 
...

I hope it help you...

I have written a really simple script to output ros topics to a text file. you can find the script here; http://https://gist.github.com/831611https://gist.github.com/831611

for example, we need the timestamp, width and height of sensor_msgs::PointCloud2;

$ ./topics_to_ssv -d " " hoge.ssv /camera/depth/points2/header/stamp/secs /camera/depth/points2/header/stamp/nsecs /camera/depth/points2/width /camera/depth/points2/height
$ cat hoge.ssv
/camera/depth/points2/header/stamp/secs /camera/depth/points2/header/stamp/nsecs /camera/depth/points2/width /camera/depth/points2/height 
1297944909 267601871 640 480 
1297944909 310369177 640 480 
...

I hope it help you...