ai/live: remove analyzeduration from rtmp pull.

[j0sh]

This increases the likelihood we receive enough data to initialize a video track within the alloted time.

The default is 5 seconds so this change would increase average stream startup time by 2.5 seconds.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 32.13344%. Comparing base (b9cf0ea) to head (522afe0).
Report is 1 commits behind head on master.

Additional details and impacted files

@@                 Coverage Diff                 @@
##              master       #3422         +/-   ##
===================================================
+ Coverage   32.13022%   32.13344%   +0.00322%     
===================================================
  Files            147         147                 
  Lines          40977       40976          -1     
===================================================
+ Hits           13166       13167          +1     
+ Misses         27035       27033          -2     
  Partials         776         776                 

Files with missing lines	Coverage Δ
media/rtmp2segment.go	3.40426% <ø> (+0.01443%)	⬆️

... and 1 file with indirect coverage changes

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Files with missing lines	Coverage Δ
media/rtmp2segment.go	3.40426% <ø> (+0.01443%)	⬆️

... and 1 file with indirect coverage changes

[emranemran]

To confirm, you have seen cases where the video track is not initialized with -analyzeduration of 2.5s? Before we push this to prod, we should confirm what startup time are like on staging.

[j0sh]

To confirm, you have seen cases where the video track is not initialized with -analyzeduration of 2.5s? Before we push this to prod, we should confirm what startup time are like on staging.

@emranemran - the output here is audio only