matroskamux + filesink show incorrect video length

[android6011]

I am having an issue where vlc(others wont play it) playback  reports the
length of the videos as about 2-3 seconds but sometimes it is correct. What
is the best way and to which element do I need to get it to cleanly close
the file and write the correct length to the header?

pipeline:

rtspsrc location={0} name=stream tcp-timeout=5000000 timeout=1250000 !
rtph264depay ! h264parse ! matroskamux name=container ! filesink
location=\"{1}\" name=file stream. ! rtppcmudepay ! mulawdec ! lamemp3enc !
container.



And thanks to all the devs and members who continually help everyone out :)
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