[gst-devel] Another GstAppSrc Question

[John Stowers]

On Thu, Dec 2, 2010 at 10:39 PM, ved kpl <ved.kpl at gmail.com> wrote:
> 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 ! ....

It worked fine without any extra caps

The videoparse stuff made it work!

Thanks a lot

John

>
> 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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>
> ------------------------------------------------------------------------------
> Increase Visibility of Your 3D Game App & Earn a Chance To Win $500!
> Tap into the largest installed PC base & get more eyes on your game by
> optimizing for Intel(R) Graphics Technology. Get started today with the
> Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs.
> http://p.sf.net/sfu/intelisp-dev2dev
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