[gst-devel] Another GstAppSrc Question

[ved kpl]

it expects the entire rgb caps...
Easier way would be to use videoparse after the appsrc.
eg. appsrc ! videoparse width=640 height=480 format=rgb ! ....

On Thu, Dec 2, 2010 at 11:28 AM, John Stowers
<john.stowers.lists at gmail.com> wrote:
> Hi All,
>
> I see quite a few similar questions to these on the gst-devel mailing
> list, but none of them allowed me to get past my problem.
>
> I'm building a streaming video thing using gstreamer, the prototype
> (works fine) is
>
> sender:
> gst-launch -v videotestsrc !
> video/x-raw-rgb,width=640,height=480,bpp=24,depth=24 !
> ffmpegcolorspace ! videoscale method=1 ! theoraenc bitrate=150 ! udpsink
> host=127.0.0.1 port=1234
>
> viewer:
> gst-launch -v udpsrc port=1234 ! theoradec ! autovideosink
>
> I have been translating it to C starting with the appsrc-stream example.
> I can't get it to negotiate the caps I set properly. The relevant
> warning messages are;
>
> basetransform
> gstbasetransform.c:1047:gst_base_transform_acceptcaps:<videoscale0>
> transform could not transform video/x-raw-rgb, bpp=(int)24,
> depth=(int)24, width=(int)640, height=(int)480 in anything we support
> 0:00:00.178133697 10789  0x829a8d0 WARN           basetransform
> gstbasetransform.c:1144:gst_base_transform_setcaps:<ffmpegcsp0> FAILED
> to configure caps <ffmpegcsp0:src> to accept video/x-raw-yuv,
> format=(fourcc)I420, framerate=(fraction)1/2147483647, width=(int)640,
> height=(int)480
>
> The relevant code is;
>
> app->pipeline = gst_parse_launch("appsrc name=mysource !
> video/x-raw-rgb,width=640,height=480,bpp=24,depth=24 !
> ffmpegcolorspace ! videoscale method=1 ! theoraenc bitrate=150 ! udpsink
> host=127.0.0.1 port=1234", NULL);
>
> <snip>
>
> caps = gst_caps_new_simple ("video/x-raw-rgb",
>    "bpp",G_TYPE_INT,24,
>    "depth",G_TYPE_INT,24,
>     "width", G_TYPE_INT, 640,
>     "height", G_TYPE_INT, 480,
>     NULL);
> gst_app_src_set_caps(GST_APP_SRC(app->appsrc), caps);
>
> Full source code is here
> http://pastebin.com/PJuGVJLC
>
> Any pointers?
>
> John
>
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