[FFmpeg-trac] #10501(ffmpeg:new): ffmpeg(1) prints 'kB' for byte values divided by 1024

[FFmpeg]

#10501: ffmpeg(1) prints 'kB' for byte values divided by 1024
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             Reporter:  WHR          |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  minor        |                Component:  ffmpeg
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Description changed by WHR:

Old description:

> Take the following example of a statistic output of the **ffmpeg(1)**
> command line tool:
>
> {{{
> frame=39687 fps=562 q=31.0 Lsize=  134695kB time=00:22:02.97 bitrate=
> 834.0kbits/s speed=18.7x
> video:119395kB audio:14442kB subtitle:0kB other streams:0kB global
> headers:0kB muxing overhead: 0.641295%
> }}}
>
> All the byte values have an unit of 'kB'. Based on how it matches exactly
> the offical SI unit prefix symbol (lowercased 'k') and the uppercased 'B'
> to form unit 'kilobyte', and how the man page describes what the tool
> would interpreting user's numerical inputs, I has without doubt, believed
> it was a decimal unit prefix and the number is based on powers of 1000 (1
> kB == 1000 B), for years.
> Until yesterday I found the size of one of my encoded file didn't match
> what ffmpeg(1) reported at the end of encoding; by reading the source
> file `ffmpeg.c`, I can confirm that all output numbers with 'kB' unit in
> there, are actually divided from original byte values by 1024 instead of
> 1000.
> This behavior is inconsistent and could mislead users.

New description:

 Take the following example of a statistic output of the **ffmpeg(1)**
 command line tool:

 {{{
 frame=39687 fps=562 q=31.0 Lsize=  134695kB time=00:22:02.97 bitrate=
 834.0kbits/s speed=18.7x
 video:119395kB audio:14442kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 0.641295%
 }}}

 All the byte values have an unit of 'kB'. Based on how it matches exactly
 the offical SI unit prefix symbol (lowercased 'k') and the uppercased 'B'
 to form unit 'kilobyte', and how the man page describes what the tool
 would interpreting user's numerical inputs, I has without doubt, believed
 it was a decimal unit prefix and the number is based on powers of 1000 (1
 kB == 1000 B), for years.
 Until yesterday I found the size of one of my encoded file didn't match
 what ffmpeg(1) reported at the end of encoding; by reading the source file
 `ffmpeg.c`, I can confirm that all output numbers with 'kB' unit there,
 are actually divided from original byte values by 1024 instead of 1000.
 This behavior is inconsistent and could mislead users.

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Ticket URL: <https://trac.ffmpeg.org/ticket/10501#comment:1>
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