support publishing H265 and AV1 tracks with Enhanced RTMP (#1393) (#1446) (#1621)

[aler9]

Fixes #1446

Fixes #1621

TODO:

• support publishing H265 with enhanced RTMP
• support publishing AV1 with enhanced RTMP

[codecov-commenter]

Codecov Report

Merging #1756 (a76a15b) into main (225220d) will decrease coverage by 0.96%.
The diff coverage is 52.38%.

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@@            Coverage Diff             @@
##             main    #1756      +/-   ##
==========================================
- Coverage   63.11%   62.15%   -0.96%     
==========================================
  Files          91      101      +10     
  Lines       10087    10365     +278     
==========================================
+ Hits         6366     6442      +76     
- Misses       3270     3468     +198     
- Partials      451      455       +4     

Impacted Files	Coverage Δ
internal/formatprocessor/av1.go	0.00% <0.00%> (ø)
internal/formatprocessor/h264.go	77.67% <0.00%> (ø)
internal/formatprocessor/h265.go	76.29% <0.00%> (ø)
internal/formatprocessor/processor.go	40.00% <0.00%> (-4.45%)	⬇️
internal/rtmp/message/extended_metadata.go	0.00% <0.00%> (ø)
...al/rtmp/message/extended_mpeg2ts_sequence_start.go	0.00% <0.00%> (ø)
internal/rtmp/message/extended_sequence_end.go	0.00% <0.00%> (ø)
internal/rtmp/message/extended_sequence_start.go	0.00% <0.00%> (ø)
internal/rtmp/message/set_peer_bandwidth.go	0.00% <0.00%> (ø)
internal/rtmp/message/set_window_ack_size.go	0.00% <0.00%> (ø)
... and 29 more

... and 5 files with indirect coverage changes

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