[FFmpeg-trac] #10461(ffmpeg:new): AAC-LC RTP Multicast bug

FFmpeg trac at avcodec.org
Thu Jul 27 01:44:57 EEST 2023


#10461: AAC-LC RTP Multicast bug
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             Reporter:  AJ      |                    Owner:  (none)
                 Type:  defect  |                   Status:  new
             Priority:  normal  |                Component:  ffmpeg
              Version:  6.0     |               Resolution:
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
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Comment (by AJ):

 More info/clues on this bug for the developers.

 1. From starting FFmpeg, it seems to always be 9h17m till the audio in the
 stream breaks.Easy to replicate.

 2. @9h17ms, it starts gradually degrading the audio over the course of
 about 60-90s, after which it remains either a silent stream (at the
 correct bit rate), or low level and highly distorted audio.

 3. Changing -pkt_size to a higher value (5000), reducing the packet count,
 makes no difference to the 9h17m time to fault.

 On the same pc, other instances have been test streaming HE-AAC & Opus
 streams 24/7 for 2+ weeks now without any issue. Just impacting both AAC-
 LC codecs (internal & FDK). Our application needs a AAC family codec @
 ~100 kbps, and we'd prefer to use AAC-LC than HE-AAC.

 Thank you for this useful tool.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10461#comment:2>
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