[gst-devel] [libgstdshow] gstdshwvideosrc - patch to use other video size

[Julien.Isorce at alumni.enseeiht.fr]

Hi

In the actual source code of gstdshwvideosrc.h and .c, it is not possible
to use other video size than the default (one default for each video
format rgb ,yuv..., often 320*240)

So I found a solution to use other video sizes than the default for each
video format, for example if you want use 720*576 or 1920*1080 .. and if
the default is 320*240 ...)

I join to this mail the two new files gstdshowvideosrc.c et
gstdshowvideosrc.h

In gstdshowvideosrc.c I replace :
hres = IFilterGraph_ConnectDirect (src->filter_graph,
pin_mediatype->capture_pin, input_pin, NULL);
by this one :
hres = IFilterGraph_ConnectDirect (src->filter_graph,
pin_mediatype->capture_pin, input_pin, pin_mediatype->mediatype);

Then I defined 3 more properties:
force_size (is yes, filter will use given size)
width (given frame width)
height (given frame height)

So then gst-inspect-0.10 return :
  force-size          : Use forced size
                        flags: readable, writable
                        Boolean. Default: false Current: false
  width               : Forced frame width
                        flags: readable, writable
                        Integer. Range: 80 - 1920 Default: 720 Current: 0
  height              : Forced frame height
                        flags: readable, writable
                        Integer. Range: 60 - 1080 Default: 576 Current: 0

And the command line is like this :
gst-launch-0.10 dshowvideosrc force-size=1 width = 720 height = 576 !
ffmpegcolorspace ! autovideosink
or
gst-launch-0.10 dshowvideosrc force-size=1 width = 720 height = 576 !
video/x-raw-yuv, format=(fourcc)UYVY ! ffmpegcolorspace ! autovideosink if
I want to be sure to use UYVY for example.

It is possbile to use the filter normally :
gst-launch-0.10 dshowvideosrc ! ffmpegcolorspace ! autovideosink
or
gst-launch-0.10 dshowvideosrc ! video/x-raw-yuv, format=(fourcc)UYVY,
width=320, height=240 ! ffmpegcolorspace ! autovideosink
or
gst-launch-0.10 dshowvideosrc ! video/x-raw-rgb ! ffmpegcolorspace !
autovideosink
etc...

I join to this mail the two new files gstdshowvideosrc.c et
gstdshowvideosrc.h

I am waitting your reactions.

I will be happy that my addon be in the new release !

Sincerely,

Julien Isorce

(Actually mailing list cannot accept attachements, so i cannot join the
two files !)