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    SubjectRe: i.MX6 CSC and scaler
    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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