* morituri/image/image.py: * morituri/test/test_common_checksum.py: * morituri/common/gstreamer.py (added): Factor out GstException and GstPipelineTask.
* morituri/image/image.py: * morituri/test/test_common_checksum.py: * morituri/common/gstreamer.py (added): Factor out GstException and GstPipelineTask.