> What about the v4l2_buffer.sequence field? I always assumed this is the > number of transmitted, not read frames. Exactly. > > > And to answer your question, with USB webcams you cannot infer the > > > timeperframe from any other fields in the V4L(2) API. > > > > Ok, then lets keep it. > > You do know v4l2_captureparm.timeperframe was intended to request a > different frame period (frame skipping on the driver side, reducing the > bus load) I suppose. Oops, yes. I forgot that, sorry. So maybe add some bit to v4l_std_id for "other" which can be used by the usb cams then? Gerd -- You can't please everybody. And usually if you _try_ to please everybody, the end result is one big mess. -- Linus Torvalds, 2002-04-20