multimedia/gstreamer1-plugins-zxing: Create a port.

[arrowd]

Summary

PR: 269383

[tcberner]

Apart from the question, that you can decide yourself, it looks good to me.

Thanks.

multimedia/Makefile

122

I'm not sure about the category, but it might better fit into graphics like the zbar plugin that also das bar-codey stuff, no?

[arrowd]

I put it under textproc, since the zxing library itself is under textproc.