Python API for Carla 0.9.3 requires libpng16 incompatible with ROS

[anshulpaigwar]

Python API for Carla 0.9.3 requires libpng16 while ROS and Gazebo still work with libpng12. When I installed libpng16 using apt-get it auto removes some important Gazebo and ROS files. I think Carla should also stick to libpng12 for a while. Is there any way to install both libpng16 and libpng12 ??

[nsubiron]

This is a known issue, unfortunately we don't know how to fix this except by removing PNG support #924. The problem is that we use Boost GIL for handling images, and as it turns out is not compatible with libpng12.

[jkewang]

I think you can reinstall ros-kinetic-gazebo* after installing Carla. I did this way and they both work well in my machine.

[anshulpaigwar]

Thank you @jkewang this worked for me too.

[wattsavolt]

Did you ever try FreeImage? Link to python wrapper: http://freeimagepy.sourceforge.net/

[rohanb2018]

I actually found another solution that doesn't require reinstalling ROS. If you install the libpng16-16 package (which only has the libpng runtime library files) instead of libpng16-dev, none of the Gazebo/ROS files will be removed. And it seems that the CARLA Python API works fine with only the runtime library files: I tried the tutorial.py script and it saved the PNG files without a hitch.

Hopefully this works for others as well.

EDIT: I've only tried this with the 0.9.5 release version; not sure if it works in 0.9.6 or the latest dev version of CARLA.