[mpeg2] docs

[Kees Cook <kees@outflux.net>]

Does anyone have the MPEG2-PS format documentation?  I've been having a 
very hard time finding it.  All I want to do is chop frames out of 
existing MPEG2 files (removing commercials...)  From what I understand, if 
I drop sections between I-frames, I can do this safely.  As in, if I had:

...IBBPBBPBBPIBBPBBPBBPI...

I could make it

...II...

to drop all the B and P frames safely without disrupting any B and P 
frames before the first I or after the final I.  (I realize that it's 
actually IPBBPBBPBBI.)

My trouble is that I need to drop the audio sections as well.  And to do 
this, I need to parse sync information, and possibly rebuild the entire 
Program Stream.

Does anything like this exist?  I imagine a application that gives me a
scroll bar, and "next/prev I-frame" buttons, and a "start/end cut" button,
with the preview frame window, and I just go through the MPEG2 file
marking all the commercials, and click "export", and I'm done.  :P

-- 
Kees Cook                                            @outflux.net