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We have a version of the Video library for you to try out, that switches from the ancient version of GStreamer 0.10 to the latest GStreamer 1.12. This could potentially solve a number of issues people were having with the library - it definitely eases installation on Linux, as few distributions were still carrying the required old version of GStreamer.
See the details, including a link to the ZIP file to download here: https://github.com/processing/processing-video/pull/84
Note: I am currently only interested in hearing about regressions you experience with the test version - that is: things that worked in the released version of the library, but not in this test version. I currently don't have time to deal with general issues with the library - one step at a time!