Multiple appsrc to a single muxer [SEC=UNCLASSIFIED]

[Durrand, Paul (Contractor)]

UNCLASSIFIED

I am trying to modify the mpegtsmux plugin to process KLV metadata. I am
currently having trouble creating a pipeline which will allow me to
write a video and metadata with multiple appsrc plugins.
 
A new cap has been created on mpegtsmux named "application/x-klv". I am
trying to attach an appsrc element directly to this which will mux with
an mpeg2 video via ffenc_mpeg2video.
 
My pipeline looks like this and is called using
gst_parse_bin_from_description() :
 
mpegtsmux name="muxer" ! filesink location=gstreamer.out.mpg appsrc
name="adsssrc"
caps="video/x-raw-rgb,width=704,height=480,framerate=(fraction)25/1,bpp=
24,depth=24,red_mask=255,green_mask=65280,blue_mask=16711680,endianness=
4321" ! ffmpegcolorspace ! videorate ! ffenc_mpeg2video bitrate=15000000
! muxer. appsrc name="metasrc" caps="application/x-klv" ! muxer.
 
The mpegtsmux_create_stream() function is never hit when using this
pipeline and a video is never created. In the debug there are lots of
references to queuing the buffer in gst_app_src_push_buffer_full().
 
If I remove the additional appsrc as below, the megtsmux_create_stream()
function is hit (shown through debug):
 
mpegtsmux name="muxer" ! filesink location=gstreamer.out.mpg appsrc
name="adsssrc"
caps="video/x-raw-rgb,width=704,height=480,framerate=(fraction)25/1,bpp=
24,depth=24,red_mask=255,green_mask=65280,blue_mask=16711680,endianness=
4321" ! ffmpegcolorspace ! videorate ! ffenc_mpeg2video bitrate=15000000
! muxer.
 
Can anyone tell me if the syntax for my pipeline is correct for using
multiple appsrc with mpegtsmux? 
 
Any help would be appreciated.
 
Thanks,
Paul

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