[gst-devel] Another GstAppSrc Question

[Prabhulinga Swamy B S]

Hi John,

You can just leave out the filter you are doing between 'appsrc' and 
'ffmpegcolorspace'.
That is not required since you are setting the caps of appsrc, that fine.
Have you tried like this?

app->pipeline = gst_parse_launch("appsrc name=mysource ! "
	" ffmpegcolorspace ! videoscale method=1 ! theoraenc bitrate=150 ! udpsink "
	" host=127.0.0.1 port=1234", NULL);


Prabhu



On 12/02/2010 11:28 AM, John Stowers 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
>
>
>