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| author | michael <michael@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2004-10-05 14:05:17 +0000 |
|---|---|---|
| committer | michael <michael@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2004-10-05 14:05:17 +0000 |
| commit | eaa1bc9e8a00d366f7b39038e6cfee722c232cac (patch) | |
| tree | f755981266406f00d67ac4f87761ec69677e720d /DOCS | |
| parent | 4812185d2b6dfc30d1ac71e002476d91a7711507 (diff) | |
| download | mpv-eaa1bc9e8a00d366f7b39038e6cfee722c232cac.tar.bz2 mpv-eaa1bc9e8a00d366f7b39038e6cfee722c232cac.tar.xz | |
keyframe index
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13564 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'DOCS')
| -rw-r--r-- | DOCS/tech/mncf.txt | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/DOCS/tech/mncf.txt b/DOCS/tech/mncf.txt index 31515a1181..8d3061dbd2 100644 --- a/DOCS/tech/mncf.txt +++ b/DOCS/tech/mncf.txt @@ -90,6 +90,7 @@ main header: version v stream_count v max_distance v + max_index_distance v global_time_base_nom v global_time_base_denom v for(i=0; i<256; ){ @@ -171,6 +172,7 @@ frame Index: index_startcode f(64) packet header + stream_id v index_length v for(i=0; i<index_length; i++){ index_timestamp v @@ -265,6 +267,13 @@ max_distance reason to set it higher otherwise reasonable error recovery will be impossible +max_index_distance + max distance of keyframes which are represented in the index, the + distance between consecutive entries A and B may only be larger if + there are no keyframes within this stream between A and B + SHOULD be set to <=32768 or at least <=65536 unless there is a very good + reason to set it higher + stream_id Note: streams with a lower relative class MUST have a lower relative id so a stream with class 0 MUST allways have a id which is lower then any @@ -428,11 +437,15 @@ checksum adler32 checksum index_timestamp - value of the timetamp in a sync point relative to the last sync-point + value of the timetamp of a keyframe relative to the last keyframe + stored in this index index_position - position in bytes of the first byte of a sync-point, relative to the - last sync_point + position in bytes of the first byte of a keyframe, relative to the + last keyframe stored in this index + there MUST be no keyframe with the same stream_id as this index between + 2 consecutive index entries if they are more then max_index_distance + appart id the id of the type/name pair, so its more compact @@ -532,7 +545,6 @@ info packets which describe the whole file or individual streams/tracks must be placed before any video/audio/... frames Index -every sync-point must be exacty once in the index Note: in case of realtime streaming there is no end, so no index there either Info packets |