Hi Jerome, Neil, Hans, Thanks a lot for all the insights. 2018-08-02 8:59 GMT+02:00 Hans Verkuil <hverkuil@xxxxxxxxx>: >> fail: ../../../v4l-utils-1.12.3/utils/v4l2-compliance/v4l2-test-buffers.cpp(571): q.has_expbuf(node) >> test VIDIOC_EXPBUF: FAIL > > Not sure, might well be a knock-on result of the 'one open' problem. > > BTW, always get the latest code from the v4l-utils git repo, don't use a released > version for v4l2-compliance: it's always evolving and you don't want to use an > old version. Also for the next version of this patch series add the output of > v4l2-compliance to this cover letter, I want to see it. Will do. > Finally, are you aware of the work Tomasz Figa on specifying the codec behavior? > > https://lkml.org/lkml/2018/7/24/539 > > The final version will be close to what was posted there. I wasn't, thanks for pointing it out.