[FFmpeg-trac] #10330(documentation:new): Opus documentation: lowdelay is too trivialized

FFmpeg trac at avcodec.org
Fri Apr 21 18:37:39 EEST 2023

#10330: Opus documentation: lowdelay is too trivialized
             Reporter:  Mingye Wang  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  documentation                      |  unspecified
             Keywords:  libopus      |               Blocked By:
  docs                               |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 Summary of the bug:

 FFmpeg currently describes (at https://ffmpeg.org/ffmpeg-
 codecs.html#libopus-1) `-application lowdelay` as simply "Restrict to only
 the lowest delay modes." This is true, but does not cover the whole
 picture. Compare the [[https://www.opus-
 documentation of OPUS_APPLICATION_RESTRICTED_LOWDELAY]]: "Only use when
 lowest-achievable latency is what matters most. Voice-optimized modes
 cannot be used."

 A better wording based on the above would be:
 "Restrict to only the lowest delay modes by disabling voice-optimized
 codec. This is usually unnecessary, as basic Opus already has a delay of
 22.5 ms. Try -frame_duration before using this."

 How to reproduce:
 Well, just navigate to the page. Or
 ffmpeg -h enccoder=libopus
Ticket URL: <https://trac.ffmpeg.org/ticket/10330>
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