Apologies for the delayed response.
I believe Carl Eugen have covered all the questions
The issue with packed bistreams is quite old and -if am not wrong- it came up when standalone dvd-players started playing .avi files.
A nice article about packed bitstream files and playback issues can be found in the next link http://itsjustonesandzeros.blogspot....bitstream.html
which describes pretty simple the situation.
If more sample files are needed, i would be more than glad to provide them.
Thank you for your responses, best regards, Dimitris.