diff options
Diffstat (limited to 'DOCS/tech/mpcf.txt')
| -rw-r--r-- | DOCS/tech/mpcf.txt | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/DOCS/tech/mpcf.txt b/DOCS/tech/mpcf.txt index 89e00ea41e..98e37bbc02 100644 --- a/DOCS/tech/mpcf.txt +++ b/DOCS/tech/mpcf.txt @@ -18,6 +18,8 @@ Extendible Compact ~0.2% overhead, for normal bitrates index is <10kb per hour (1 keyframe every 3sec) + a usual header for a file is about 100bytes (audio + video headers together) + a packet header is about ~8 bytes Error resistant seeking / playback without an index headers & index can be repeated @@ -82,8 +84,8 @@ reserved_bytes a compatible way main header: - packet header main_startcode f(64) + packet header version v stream_count v file_size v @@ -92,8 +94,8 @@ main header: checksum u(32) stream_header: - packet_header stream_startcode f(64) + packet_header stream_id v stream_class v fourcc b @@ -130,7 +132,6 @@ audio_stream_header: checksum u(32) frame - packet header if(keyframe){ keyframe_startcode f(64) } @@ -140,6 +141,7 @@ frame msb_timestamp_flag u(1) subpacket_type u(2) reserved u(1) + packet header stream_id v if(msb_timestamp_flag) msb_timestamp v @@ -168,8 +170,8 @@ frame frame_checksum u(32) Index: - packet header index_startcode f(64) + packet header stream_id v index_length v for(i=0; i<index_length; i++){ @@ -180,8 +182,8 @@ Index: checksum u(32) info_packet: (optional) - packet header info_startcode f(64) + packet header for(;;){ id v if(id==0) break |