Author: michael Date: Tue Jan 30 01:47:28 2007 New Revision: 22069 Modified: trunk/DOCS/tech/nut.txt Log: better back_ptr_div16 description by (Clemens Ladisch ((( cladisch ( fastmail (( net Modified: trunk/DOCS/tech/nut.txt ============================================================================== --- trunk/DOCS/tech/nut.txt (original) +++ trunk/DOCS/tech/nut.txt Tue Jan 30 01:47:28 2007 @@ -736,10 +736,11 @@ back_ptr_div16 (v) back_ptr = back_ptr_div16 * 16 + 15 - back_ptr must point to a position within 16 bytes of a syncpoint - startcode. This syncpoint MUST be the closest syncpoint such that at - least one keyframe with a pts lower or equal to the original syncpoint's - global_key_pts for all streams lies between it and the current syncpoint. + back_ptr must point to a position up to 15 bytes before a syncpoint + startcode. Relative to position of current syncpoint. The syncpoint + pointed to MUST be the closest syncpoint such that at least one keyframe + with a pts lower or equal to the current syncpoint's global_key_pts for + all streams lies between it and the current syncpoint. A stream where EOR is set is to be ignored for back_ptr.