View source for NTS File Format

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MPEG2 - 32 byte entries

Offset		Purpose                                      Value
--------------------------------------------------------------------------------------------------------------
0x00  3 bytes	Offset from Seq. header to current frame.	Address of this frame minus address of Sequence header.
0x03  1 byte	Frame Type					0x01 = I-Frame, 0x02 = P-Frame, 0x03 = B-Frame.
0x04  1 byte	SD/HD flag					0x20 = SD. 
0x05  1 byte	Picture sequence frame count			0 to 12 (13 frames) for first count only, then 3 to 14 (12 frames) after that. 
0x06  2 byte    Offset from Seq. header to first frame.		Address of first frame in Sequence minus address of Sequence header.  
0x08  8 bytes	Picture header address.				Address of this frame.
0x10  4 bytes	Presentation TimeStamp (PTS)			The first 32 bits of PES PTS.
0x14  4 bytes	Frame size.					Address of next frame minus address of this frame. 
0x18  4 bytes	Played Time					Played time in milliseconds.
0x1C  4 bytes	Unused						N/A


H264 - 64 byte entries

Offset		Purpose                                      Value
--------------------------------------------------------------------------------------------------------------
0x00  3 bytes	Offset from PicParamSet to current SEI.		Address of SEI preceding current frame minus address of last PicParamSet.
0x03  1 byte	Frame Type					0x01 = I-Frame, 0x02 = P-Frame, 0x03 = B-Frame.
0x04  1 byte	HD Flag						0x30 = HD.
0x05  1 byte	Picture sequence frame count.			Starts at zero for first count only, then starts at 1 after that. Consequently the last
                                                                0x08 entry of each count sequence contains the address of first SEI of the next sequence.
0x06  2 bytes	Offset from PicParamSet to first SEI.		Address of first SEI in sequence minus address of last PicParamSet.
0x08  8 bytes	SEI address.					Address of SEI preceding the frame.
0x10  4 bytes	Presentation TimeStamp (PTS)			The first 32 bits of PES PTS.
0x14  4 bytes	Frame size.					Address of the AUD immediately after frame minus address of SEI preceding the frame. 
0x18  4 bytes	Played Time.					Played time in milliseconds for timebar display.
0x1C  4 bytes	Unused						N/A
0x20  4 bytes	HeaderEndSize					Address of SEI minus address of last SeqParamSet
0x24  4 bytes	ExtDistance					Address of last PicParamSet minus address of last SeqParamSet 
0x28 24 bytes	Unused						N/A


All values are in reverse byte order (little endian)

File analysis by raydon
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