video decoder and video sink plugins not negotiating using playbin

[ajay kumar]

Hi,

I'm beginner to gstreamer, and am developing a customized h264 video decoder
and video sink plugins. These plugins are working with 'gst-launch-0.10' 

gst-launch-0.10 filesrc location=/multimedia_samples/sample_onlyvideo.mp4 !
qtdemux name=demux demux.video_00 ! ajayh264dec ! ajayvidsink

But with 'playbin', the elements are not negotiating. 

 gst-launch playbin video-sink='ajayvidsink'
uri=file:///multimedia_samples/sam
ple_onlyvideo.mp4 -v

Below is the 'log' received for above play bin command.

Setting pipeline to PAUSED ...
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src:
caps = video/quicktime, variant=(string)iso
Pipeline is PREROLLING ...
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0.GstPad:sink:
caps = video/quicktime, variant=(string)iso
/GstPlayBin:playbin0/GstStreamSelector:selector_video_src0: active-pad =
NULL


Ajayvidsink:start/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstQueue:queue0.GstPad:sink:
caps = video/x-h264, stream-format=(string)avc, alignment=(string0
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstQueue:queue0.GstPad:src:
caps = video/x-h264, stream-format=(string)avc, alignment=(string)au,
level=(string)0

mine: pad = sinkpad
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/Gstajaydec:ajaydec0.GstPad:sink:
caps = video/x-h264, stream-format=(string)avc, alignment=(string)au,
level=(st0

ajaydec: decoding
h264/GstPlayBin:playbin0/GstDecodeBin:decodebin0.GstGhostPad:src0: caps =
video/x-h264, stream-format=(string)avc, alignment=(string)au, le0
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/Gstajaydec:ajaydec0.GstPad:src:
caps = video/x-h264, stream-format=(string)avc, alignment=(string)au,
level=(str0
/GstPlayBin:playbin0/GstStreamSelector:selector_video_src0.GstPlaybinSelectorPad:sink0:
caps = video/x-h264, stream-format=(string)avc, alignment=(string)au,0
/GstPlayBin:playbin0/GstDecodeBin:decodebin0.GstGhostPad:src0.GstProxyPad:proxypad2:
caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, le0
/GstPlayBin:playbin0/GstStreamSelector:selector_video_src0.GstPad:src: caps
= video/x-h264, stream-format=(string)avc, alignment=(string)au,
level=(string)3.0
/GstPlayBin:playbin0/GstQueue:preroll_video_src0.GstPad:sink: caps =
video/x-h264, stream-format=(string)avc, alignment=(string)au,
level=(string)3.1, profil0

ajaydec: decoding h264
ajaydec: decoding h264
ajaydec: decoding h264
ajaydec: decoding h264
ajaydec: decoding
h264/GstPlayBin:playbin0/GstQueue:preroll_video_src0.GstPad:src: caps =
video/x-h264, stream-format=(string)avc, alignment=(string)au, leve0

ajaydec: decoding h264
ajaydec: decoding h264ERROR: from element
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0: GStreamer
encountered a general stream error.
Additional debug info:
qtdemux.c(3865): gst_qtdemux_loop ():
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0:
streaming stopped, reason not-negotiated
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...

Ajayvidsink:stop/GstPlayBin:playbin0/GstQueue:preroll_video_src0.GstPad:src:
caps = NULL
/GstPlayBin:playbin0/GstQueue:preroll_video_src0.GstPad:sink: caps = NULL
/GstPlayBin:playbin0/GstStreamSelector:selector_video_src0.GstPlaybinSelectorPad:sink0:
caps = NULL
/GstPlayBin:playbin0/GstStreamSelector:selector_video_src0.GstPad:src: caps
= NULL
/GstPlayBin:playbin0/GstDecodeBin:decodebin0.GstGhostPad:src0: caps = NULL
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/Gstajaydec:ajaydec0.GstPad:src:
caps = NULL
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/Gstajaydec:ajaydec0.GstPad:sink:
caps = NULL
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstQueue:queue0.GstPad:src:
caps = NULL
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstQueue:queue0.GstPad:sink:
caps = NULL
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0.GstPad:video_00:
caps = NULL
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0.GstPad:sink:
caps = NULL
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src:
caps = NULL
Freeing pipeline ...

Attaching video decoder, video sink source templates. Please LMK what am I
missing here.

gstajayvidsink_template.c
<http://gstreamer-devel.966125.n4.nabble.com/file/n4661420/gstajayvidsink_template.c>  
gstajayh264decoder_template.c
<http://gstreamer-devel.966125.n4.nabble.com/file/n4661420/gstajayh264decoder_template.c>  

thanks,
ajay






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