[vdr] How does VDR handle AFD?

Reinhard Nissl rnissl at gmx.de
Thu Sep 15 23:00:34 CEST 2005


Johannes Stezenbach wrote:

>>AFD information appears in the video stream after user data startcodes 
>>(0x000001B2) and these appear before picture start codes (0x00000100). 
> User data and thus AFD can be in other places, too (in theory, I have
> no practical experience). Described in the MPEG-2 video spec.

You are right, there are 3 places for user data: user data 0 is in front 
of a group start code, user data 1 appears in front of the picture start 
code and user data 2 is before the first slice start code.

But all of them should typically be within 2048 bytes when 
cVideoRepacker starts a new PES packet just after the last slice of a 

Dipl.-Inform. (FH) Reinhard Nissl
mailto:rnissl at gmx.de

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