[gst-devel] Another GstAppSrc Question

[ved kpl]

On Thu, Dec 2, 2010 at 4:24 PM, John Stowers
<john.stowers.lists at gmail.com> wrote:
> On Thu, Dec 2, 2010 at 10:52 PM, Prabhulinga Swamy B S
> <prabhulingaswamy.bs at globaledgesoft.com> wrote:
>> 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?
>
> Yeah. The solution was to add a videoparse filter (noted in another reply).

   Also, u need not set any caps on appsrc.
>
> Thanks,
>
> John



>>
>> 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
>>>
>>>
>>>
>>
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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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