Last 2 writes to cutom source element(thoretically similar to file src) doesn't reflect in output

[appu]

Hi All,

I am a newbie in Gstreamer and, I am in need of developing a custom
Gstreamer plugin(similar to file src). Final aim is to develop a gstreamer
source elelment plugin, which read data from various hardware
peripherals and feed the input to the down stream. 

For achieving the above, I started developing from the 'gst-template-master'
and fitted a 'task' for pulling the data by reading from a file. I know,
there is 'FileSrc' derived from 'BaseSrc', but I would like my design, this
way. In a 'while loop', I read the data from file until read returns zero
and wrote to the downstream pipeline using "gst_pad_push (filter->srcpad,
buf);" each time it was read. Then I wrote application to connect my element
with "filesink" and tested. 

The input file is copied to an output file in multiple reads, except the
last two reads. I don't understand why this happens. Could anybody please
advice me how this can be solved, or any clue? 

Thanks in advance
Appu



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