transport_stream_analysis
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| transport_stream_analysis [2017/01/06 09:40] – [Transport Stream Packet Description] walkeradmin | transport_stream_analysis [2017/01/06 09:41] – [PCR PTS DTS] walkeradmin | ||
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| ==== Transport Stream Packet Description ==== | ==== Transport Stream Packet Description ==== | ||
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| ==== Adaption Field Format Description ==== | ==== Adaption Field Format Description ==== | ||
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| - | Name Number Description | ||
| - | of bits | ||
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| - | sync byte | ||
| - | 8 0x47 | ||
| - | Transport Error Indicator (TEI) 1 Set by demodulator if can't correct errors in the stream, to tell the demultiplexer that the packet has an uncorrectable error [11] | ||
| - | Payload Unit Start Indicator 1 1 means start of PES data or PSI otherwise zero only. | ||
| - | Transport Priority 1 1 means higher priority than other packets with the same PID. | ||
| - | PID 13 Packet ID | ||
| - | Scrambling control 2 00' | ||
| - | 01' = Reserved for future use | ||
| - | 10' = Scrambled with even key, | ||
| - | 11' = Scrambled with odd key | ||
| - | Adaptation field exist 2 01 = no adaptation fields, payload only | ||
| - | 10 = adaptation field only | ||
| - | 11 = adaptation field and payload | ||
| - | Continuity counter 4 Incremented only when a payload is present (i.e., adaptation field exist is 01 or 11)[13] | ||
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| - | Note: the total number of bits above is 32 and is called the transport stream 4-byte prefix or Transport Stream Header. | ||
| - | Adaptation field 0 or more Depends on flags | ||
| - | Payload Data 0 or more Depends on flags | ||
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| - | Adaptation Field Format Description | ||
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| - | Name Number Adaptation Field Format Description | ||
| - | of bits | ||
| - | Adaptation Field Length 8 Number of bytes in the adaptation field immediately following this byte | ||
| - | Discontinuity indicator 1 Set to 1 if current TS packet is in a discontinuity state with respect to either the continuity counter or the program clock reference | ||
| - | Random Access indicator 1 Set to 1 if the PES packet in this TS packet starts a video/audio sequence | ||
| - | Elementary stream priority indicator 1 1 = higher priority | ||
| - | PCR flag 1 1 means adaptation field does contain a PCR field | ||
| - | OPCR flag 1 1 means adaptation field does contain an OPCR field | ||
| - | Splicing point flag 1 1 means presence of splice countdown field in adaptation field | ||
| - | Transport private data flag 1 1 means presence of private data bytes in adaptation field | ||
| - | Adaptation field extension flag 1 1 means presence of adaptation field extension | ||
| - | Below fields are optional variable Depends on flags | ||
| - | PCR 33+9 Program clock reference, stored in 6 octets in big-endian as 33 bits base, 6 bits padding, 9 bits extension. | ||
| - | OPCR 33+9 Original Program clock reference. Helps when one TS is copied into another | ||
| - | Splice countdown 8 Indicates how many TS packets from this one a splicing point occurs (may be negative) | ||
| - | stuffing bytes variable | ||
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transport_stream_analysis.txt · Last modified: 2023/03/09 22:35 by 127.0.0.1