fixed frame loss when time_jitter is off

[NodeBoy2]

Description'

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1. SRS Version: 4.0release branch
2. The log for SRS is as follows:'

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shrinking, size=2, removed=2, max=30000ms
dispatch cached gop success. count=49, duration=-1
create consumer, active=1, queue_size=0.00, jitter=30000000

1. The configuration for SRS is as follows:

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vhost __defaultVhost__ {
    time_jitter     off;
}

Replay

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How to replay bug?

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How to replay bug?

1. Configure time_jitter to off.
2. Start streaming.
3. After 30 seconds, use ffplay to play the stream. There is a noticeable audio-video desynchronization in the first 2 seconds, with the video playing slower.

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Problem

1. When there is a consumer, SRS will send: metadata -> audio sequence header -> video sequence header -> GOP cache -> ...
2. When putting packets into the consumer distribution queue SrsMessageQueue, if the cached frame duration in SrsMessageQueue exceeds 30 seconds, the first frame (usually a video keyframe) will be discarded.
3. Set time_jitter to off. The timestamp of the sequence header (the first packet in the queue) is usually 0, and the timestamp of the subsequent GOP cache may already be greater than 30 seconds, resulting in frame loss.

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Fix

When calculating the accumulated duration of data in SrsMessageQueue, exclude the calculation of the sequence header.

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TRANS_BY_GPT3

[NodeBoy2]

PR corresponding to 3.0 release: #2186

TRANS_BY_GPT3

[codecov-commenter]

Codecov Report

Merging #2635 (63549f2) into 4.0release (81fa762) will not change coverage.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           4.0release    #2635   +/-   ##
===========================================
  Coverage       59.53%   59.53%           
===========================================
  Files             122      122           
  Lines           51715    51715           
===========================================
  Hits            30788    30788           
  Misses          20927    20927           

| Impacted Files | Coverage Δ | |'

Translated to English while maintaining the markdown structure:

'| Impacted Files | Coverage Δ | |
|---|---|---|
| trunk/src/app/srs_app_source.cpp | 0.66% <0.00%> (ø) | |

'

Translated to English while maintaining the markdown structure:

'| trunk/src/app/srs_app_source.cpp | 0.66% <0.00%> (ø) | |

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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

[winlinvip]

Fixed by ed1c499

[winlinvip]

Dup to #2186