What is the Correct Way to Use the Append Property of Filesink Element?

[wlm014]

Hello all,

I am trying to use the append property of the filesink element to append
video to the end of a file.  I use this pipeline to first make the video
file:

gst-launch videotestsrc num-buffers=200 pattern=snow ! x264enc ! avimux !
filesink location="c:\\naiob\\video.avi"

Then I use this pipeline to append to the file:

gst-launch videotestsrc num-buffers=200 ! x264enc ! avimux ! filesink
location="c:\\naiob\\video.avi" append=true

When I try to play this file with VLC the total length is shown as 6
seconds.  After playing through the 6 seconds of the video produced by the
first pipeline, the video continues another 6 seconds through the video
produced by the second pipeline.  So at the end  the video produced by both
pipelines is definitely in the file, but something is wrong with the
metadata because VLC is showing only 6 seconds, not the full 12.

I also tried playing the file with a gstreamer pipeline:

gst-launch filesrc location="c:\\naiob\\video.avi" ! avidemux ! ffdec_h264 !
ffmpegcolorspace ! glimagesink

This pipeline plays the first six seconds of video, then prints that it
received EOS and the pipeline shuts down.  So it seems the EOS from the
first pipeline is still in the file and causing it to stop playing early.

Am I not understanding the usage of the append property correctly?  Could
someone please provide me with some information about get these pipeline to
work the way I am intending them?

Thank you for your help,
William 

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