jpegdec and x-raw-rgb

[emmanuel pouthier]

Thank you very much.

2012/7/4 Tim-Philipp Müller <t.i.m at zen.co.uk>

> On Wed, 2012-07-04 at 02:50 -0700, hasardel wrote:
>
> Hi,
>
> > I started with GStreamer.
> > My plugin accepts caps "video/x-raw-rgb".
> >
> > gst-launch --verbose filesrc location="test.jpg" ! jpegdec ! imagefreeze
> !
> > video/x-raw-rgb ! myplugin ! autovideosink
> > Définition du pipeline à PAUSED...
> > Le pipeline est en phase de PREROLL...
> > /GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:src: caps =
> > video/x-raw-yuv, format=(fourcc)I420, width=(int)1280, height=(int)819,
> > framerate=(fraction)0/1
> > ERREUR : de l'élément /GstPipeline:pipeline0/GstFileSrc:filesrc0 : Erreur
> > interne de flux de données.
> > Information de débogage supplémentaire :
> > gstbasesrc.c(2625): gst_base_src_loop ():
> > /GstPipeline:pipeline0/GstFileSrc:filesrc0:
> > streaming task paused, reason not-negotiated (-4)
> > ERREUR : le pipeline refuse de passer en phase de préparation.
> > Définition du pipeline à NULL...
> > /GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:src: caps = NULL
> > Libération du pipeline...
> >
> > The pad "src" of jpegdec accepts caps "video/x-raw-yuv",
> "video/x-raw-rgb"
> > and "video/x-raw-gray".
> > I don't understand why ?
>
> Only sink pads "accept" different caps really. Source pad caps tend to
> depend on the input caps and the input data. jpegdec might output RGB
> for some images and YUV I420 for others.
>
> Just doing: ..... ! jpegdec ! ffmpegcolorspace ! yourplugin ! ...
>
> should work, assuming yourplugin announces its RGB caps properly in its
> sink pad template caps.
>
> Cheers
>  -Tim
>
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