Support for multiple SPS/PPS, then pick the first one.

[duiniuluantanqin]

No description provided.

[codecov-commenter]

Codecov Report

Merging #2544 (dd5e6b8) into develop (85620a3) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop    #2544   +/-   ##
========================================
  Coverage    59.18%   59.18%           
========================================
  Files          122      122           
  Lines        51724    51728    +4     
========================================
+ Hits         30611    30614    +3     
- Misses       21113    21114    +1     

| Impacted Files | Coverage Δ | |'

Translated to English while maintaining the markdown structure:

'| Impacted Files | Coverage Δ | |
|---|---|---|
| trunk/src/kernel/srs_kernel_codec.cpp | 90.07% <ø> (ø) | |'

Translated to English while maintaining the markdown structure:

| trunk/src/kernel/srs_kernel_codec.cpp | 90.07% <ø> (ø) | |
| trunk/src/utest/srs_utest_kernel.cpp | 98.49% <100.00%> (+<0.01%) | ⬆️ |
| trunk/src/protocol/srs_rtmp_handshake.cpp | 84.13% <0.00%> (-0.18%) | ⬇️ |

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| Δ = absolute <relative> (impact), ø = not affected, ? = missing data |

Translated to English while maintaining the markdown structure:

| Δ = absolute <relative> (impact), ø = not affected, ? = missing data |

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TRANS_BY_GPT3

[mypopydev]

Any special reason just pick the first one?

[duiniuluantanqin]

Any special reason just pick the first one?

Indeed, no official information was found, only found this: [https://stackoverflow.com/questions/20682275/h264-with-multiple-pps-and-sps].

Most decoders/muxers parse the first SPS/PPS as part of a setup process and ignore subsequent SPSs.

For streaming media, multiple SPS/PPS is meaningless. For example, if you want to change the resolution midway, you can simply place the latest SPS/PPS before the next IDR frame. Therefore, choosing the first or the last one does not make any difference.

TRANS_BY_GPT3