mirror of https://github.com/mpv-player/mpv
1) change date and goals slightly
2) fix 's' in info packets 3) rename sync_point to syncpoint, and frame_startcode to syncpoint_startcode git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17327 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -1,5 +1,5 @@
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========================================
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NUT Open Container Format DRAFT 20051118
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NUT Open Container Format DRAFT 20060105
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========================================
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@ -23,7 +23,7 @@ Compact
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~0.2% overhead, for normal bitrates
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index is <10kb per hour (1 keyframe every 3sec)
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a usual header for a file is about 100 bytes (audio + video headers together)
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a packet header is about ~1-8 bytes
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a packet header is about ~1-5 bytes
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Error resistant
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seeking / playback without an index
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@ -243,6 +243,8 @@ info_frame: (optional)
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name vb
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if(type=="v")
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value v
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else if(type=="s")
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value s
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else
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value vb
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}
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@ -254,8 +256,8 @@ info_packet: (optional)
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packet header
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info_frame
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sync_point:
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frame_startcode f(64)
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syncpoint:
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syncpoint_startcode f(64)
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global_timestamp v
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back_ptr v
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@ -277,8 +279,8 @@ file:
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info_packet
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}
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while(next_code != main_startcode){
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if(next_code == frame_startcode)
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sync_point
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if(next_code == syncpoint_startcode)
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syncpoint
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frame
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}
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}
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@ -316,10 +318,10 @@ main_startcode
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stream_starcode
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0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48)
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frame_startcode
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syncpoint_startcode
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0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48)
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frame_startcodes SHOULD be placed immediately before a keyframe if the
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syncpoint_startcodes SHOULD be placed immediately before a keyframe if the
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previous frame of the same stream was a non-keyframe, unless such
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non-keyframe - keyframe transitions are very frequent
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@ -333,8 +335,8 @@ version
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NUT version. The current value is 2.
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max_distance
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max distance of frame_startcodes, the distance may only be larger if
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there is only a single frame between the two frame_startcodes this can
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max distance of syncpoints, the distance may only be larger if
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there is no more than a single frame between the two syncpoints. This can
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be used by the demuxer to detect damaged frame headers if the damage
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results in too long of a chain
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