Messages in this thread | | | From | Jean-Michel Hautbois <> | Date | Mon, 15 Dec 2014 22:27:24 +0100 | Subject | Re: i.MX6 CSC and scaler |
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2014-12-15 19:52 GMT+01:00 Nicolas Dufresne <nicolas.dufresne@collabora.com>: > > > Le 12/15/2014 01:23 PM, Steve Longerbeam a écrit : >> You would need to write a gstreamer plugin to make use of the >> mem2mem device for h/w CSC and scaling.
Thank you Steve, this is of a great help !
> There is an element already (v4l2transform), though it currently only > handle color conversion. I'd like to see scaling in that too instead of > having a separate element that only do scaling like: > > https://bugzilla.gnome.org/show_bug.cgi?id=726104
Nice idea. You are probably right Nicolas, it would make sense to be able to scale and convert color in the same element.
> I think Michael and Philipp idea was that scaling could be done directly > out of the decoder, something supported by CODA driver. There is some > work require to get that in GStreamer, see: > > https://bugzilla.gnome.org/show_bug.cgi?id=733827 (pixel format nego) > https://bugzilla.gnome.org/show_bug.cgi?id=733828 (display size nego)
There is a need for a separate element too. So it could be handled in front of the encoder if needed, on decoder output if needed, but should be a single element too, instanciable multiple times if multiple inputs/outputs are needed.
JM
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