[FFmpeg-trac] #8793(undetermined:closed): Add 'peak' mode to showwavespic

FFmpeg trac at avcodec.org
Fri Jul 17 14:09:33 EEST 2020

#8793: Add 'peak' mode to showwavespic
             Reporter:  MelkorLord   |                    Owner:
                 Type:  enhancement  |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:  invalid
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by MelkorLord):

 I don't think "draw=full" is the right answer. Please see the attached
 waveforms to see the difference.

 !SoundForge (Windows) only supports peak level display and the waveform is
 identical to Audcacity's dark blue part.

 Audacity displays both peak (dark blue) and average RMS (light blue) and
 the light blue part is quite identical to FFMPEG's showwavespic overall

 Besides, there's no apparent difference between "draw=scale" and
 "draw=full" options, at least not using this resolution. Using higher
 resolutions (tested up to 3840 pixels width) shows differences but the
 waveform aspect remains the same, only more detailed as the "draw=full"
 seems to imply.

 If you need the OGG Vorbis sample, just ask but I'll have to compress it
 further because it's a bit bigger than the allowed attachment size (2.5 MB
 vs 3.9 MB for the OGG file)

Ticket URL: <https://trac.ffmpeg.org/ticket/8793#comment:2>
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