There is an error in calculating the PCR of the ts stream in srs_kernel_ts.cpp.

[daozhao]

The function int SrsTsAdaptationField::encode(SrsStream* stream) in srs_kernel_ts.cpp has an error in calculating the PCR of the ts stream. The code for calculating the PCR in the function is as follows:

        int64_t pcrv = program_clock_reference_extension & 0x1ff;
        pcrv |= (const1_value0 << 9) & 0x7E00;
        pcrv |= (program_clock_reference_base << 15) & 0x1FFFFFFFF000000LL;

        pp = (char*)&pcrv;
        *p++ = pp[5];
        *p++ = pp[4];
        *p++ = pp[3];
        *p++ = pp[2];
        *p++ = pp[1];
        *p++ = pp[0];

One of them:

pcrv |= (program_clock_reference_base << 15) & 0x1FFFFFFFF000000LL;

It should be changed to:

pcrv |= (program_clock_reference_base << 15) & 0xFFFFFFFF8000LL;

Because the composition of PCR is 33 (PCR_Base) + 6 (PCR_const) + 9 (PCR_Ext).

Additionally, there is another calculation method mentioned in stackoverflow. However, their method is not easy to understand.

Although this PCR calculation error is relatively small.

TRANS_BY_GPT3

[winlinvip]

We will check it.

[winlinvip]

Fixed in 85a7cb8

[winlinvip]

About pcr, read #311