[FFmpeg-trac] #8827(ffmpeg:new): ffmpeg prints out inconsistent transcoding stats for multiple outputs

[FFmpeg]

#8827: ffmpeg prints out inconsistent transcoding stats for multiple outputs
-------------------------------------+-------------------------------------
             Reporter:  doubleecao   |                     Type:
                                     |  enhancement
               Status:  new          |                 Priority:  normal
            Component:  ffmpeg       |                  Version:  git-
                                     |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 After transcoding, for multiple output with when two outputs are
 specified, output 0 has size of 100 kB and output 1 has size of 50 kB,
 ffmpeg prints something like:
 {{{
 frame=  206 fps=3.6 q=0.0 LPSNR=Y:45.57 U:50.04 V:50.07 *:46.62 size=
 100kB time=00:00:07.10 bitrate=1362.7kbits/s speed=0.124x
 video:140kB audio:79kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.382502%
 }}}

 video:140kB size is not consistent with the size reported to the previous
 line because it is an aggregation of all output streams.

 This behavior should be reproducible for any inputs to produce multiple
 outputs.

 How to reproduce:
 {{{
 % ffmpeg -i <input> -y output0 -y output1
 }}}

 Proposal:
 Add an option to print stats for each outputs. Keep the original prints so
 that people are not surprised with the previous behavior for now. The new
 behavior would be something like:
 {{{
 video:50kB audio:38kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.382502%
 video:50kB audio:38kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.382502%
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/8827>
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