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TS流分析

TS流分析

 

1.  文件來(lái)源

Ø  PS文件:prison_break_clip0.mpg

Ø  TS抓包文件:dump:http://dl2.csdn.net/down4/20070729/29203617214.dump

2.  TS流分析

2.1 PAT

(1) 起始地址:0x001e

(2) 各字段內容:

    Header:

sync_byte(1B)0x47

transport_error_indicator (1b)0

payload_unit_start_indicator(1b)

1,  該字段置1表示攜帶的是PSIPES第一個(gè)包

            transport_priority(1b)0

            PID(13b)0 0000 0000 0000,說(shuō)明攜帶的是PAT

            Transport_scrambling_control(2b)00

            Adaptation_field_control(2b)11,標識既有adaptation_field又有payload

        Adaptation_field

            adaptation_field_length1B):0xa6

            discontinuity_indecator(1b)0

            random_access_indicator(1b)0

            elementary_stream_priority_indicator(1b)0

            PCR_flag(1b)0

            OPCR_flag(1b)0

            splicing_point_flag(1b)0

            transport_private_data_flag(1b)0

            adaptation_field_extension_flag1b):0

            stuffing_bytes:填充0xff,結束地址:0x00c6

        point_field(1B)0x00

        Program Association Section

            table_id(1B)0x00,PAT表固定值

            section_syntax_indicator(1b)1

            ‘0’

            ‘11’

            section_length(12b)0x 0 0d

            transport_stream_id(2B)0x 4b 7c,為何是這個(gè)值??????

            ‘11’

            version_number(5b)00 101

            current_next_indicator(1b)0

            section_number(1B)0x 00

            last_section_number(1B)0x 00

           進(jìn)入N _loop循環(huán)

           program_number(2B)0x 00 01

           ‘111’

           program_map_PID(13b)0 0000 0100 00100x42

 

           CRC32(4B)0xbec6 cee3

2.2 PMT

1)起始地址:0x00d8

    2)各字段內容:

      Header:

sync_byte(1B)0x47

transport_error_indicator (1b)0

payload_unit_start_indicator(1b)

1,  該字段置1表示攜帶的是PSIPES第一個(gè)包

            transport_priority(1b)0

            PID(13b)0 0000 0100 00100x42),說(shuō)明攜帶的是節目1PMT

            Transport_scrambling_control(2b)00

            Adaptation_field_control(2b)11,標識既有adaptation_field又有payload

        Adaptation_field

            adaptation_field_length1B):0x9c

            discontinuity_indecator(1b)0

            random_access_indicator(1b)0

            elementary_stream_priority_indicator(1b)0

            PCR_flag(1b)0

            OPCR_flag(1b)0

            splicing_point_flag(1b)0

            transport_private_data_flag(1b)0

            adaptation_field_extension_flag1b):0

            stuffing_bytes:填充0xff,結束地址:0x0178

        point_field(1B)0x00

        Program Map Section

            table_id(1B)0x02,PMT表固定值

            section_syntax_indicator(1b)1

            ‘0’

            ‘11’

            section_length(12b)0x 0 17

            program number(2B)0x00 01

            ‘11’

            version_number(5b)11 100

            current_next_indicator(1b)1

            section_number(1B)0x 00

            last_section_number(1B)0x 00

            ‘111’

            PCR_PID(13b)0 0000 0100 01000x44

           ‘1111’

           program_info_length(12b)0000 0000 0000

           進(jìn)入N _loop循環(huán)

           stream_type(1B)0x 02 (13818-2 Video stream)

           elementarty_PID(13b)0 0000 0100 01000x44//為何為0x44,用戶(hù)自定義???

           ‘1111’

           ES_info_length(12b)0000 0000 0000

 

           stream_type(1B)0x03 (ISO/IEC 11172Audio,為什么不是04 13818-3video??)

           ‘111’

           elementary_PID(13b)0 0000 0100 10010x45

           ‘1111’

           ES_info_length(12b)0000 0000 0000

 

           CRC_32(4B)0x73cf 72ce

2.3 PES

1)起始地址:0x0194

    2)各字段內容:

      Header:

sync_byte(1B)0x47

transport_error_indicator (1b)0

payload_unit_start_indicator(1b)

2,  該字段置1表示攜帶的是PSIPES第一個(gè)包

            transport_priority(1b)0

            PID(13b)0 0000 0100 01000x44),說(shuō)明攜帶的是節目1的視頻PES

            Transport_scrambling_control(2b)00

            Adaptation_field_control(2b)11,標識既有adaptation_field又有payload

        Adaptation_field

            adaptation_field_length1B):0x07

            discontinuity_indecator(1b)0

            random_access_indicator(1b)0

            elementary_stream_priority_indicator(1b)0

            PCR_flag(1b)1

            OPCR_flag(1b)0

            splicing_point_flag(1b)0

            transport_private_data_flag(1b)0

            adaptation_field_extension_flag1b):0

           

program_clock_reference_base(33b)0101 0010 0011 0101 0111 0111 0101 0011 0

reserved(6b)111 111

            program_clock_reference_extension(9b)0 0000 0000       

        PES

            packet_start_code_prefix(24b)0x00 00 01

            stream_id(1B)0xe0

            PES_packet_length(2B)0x20cf,PS上為0x07ec???????

         optional_PES_HEADER

            ‘10’

            PES_scrambling_control(2b)00

            PES_priority(1b)0

            data_alignment_indicator(1b)0

            copyright(1b)0

            original_or_copy(1b)0

            PTS_DTS_flags(2b)11

            ESCR_flag(1b)0

            ES_rate_flag(1b)0

            DSM_trick_mode_flag(1b)0

            additional_copy_info_flag(1b)0

            PES_CRC_flag(1b)0

            PES_extension_flag(1b)0

            PES_header_data_length1B):0x0a

           

            PTS_DTS(10B)0x 35 91af 1293 1591 adf5 41,

PS中為 0x 31 00 01 a9 f3 11 00 01 8c a1,為何不同?

         video_sequencePS中完全相同

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