v210, UYVP and IYU1 are complex formats for which pixel stride does not really have a meaning. If we copy width*pstride bytes per line, it's not going to do the right thing. As a fallback, copy stride bytes per line. This might copy uninitialized bytes at the end of each line, but at least copies the frame. https://bugzilla.gnome.org/show_bug.cgi?id=755392