[FFmpeg-trac] #1686(documentation:new): Dataloss because ffmpeg manpage about -passlogfile is wrong

[FFmpeg]

#1686: Dataloss because ffmpeg manpage about -passlogfile is wrong
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             Reporter:  jonb         |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  minor        |                Component:
              Version:  unspecified  |  documentation
             Keywords:  passlogfile  |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by jonb):

 Excuse me, but dataloss is NEVER EVER minor. Dataloss is a serious problem
 and the documentation and/or code should be changed quickly.

 I can confirm that I did not overwrite the input source file with these
 commands:

 ffmpeg -i 00004.MTS -vcodec mpeg4 -sameq -acodec copy -deinterlace -r 25
 -s 1440x1080 -t 1537 -pass 1 -an -passlogfile 00004.MTS -f rawvideo -y
 /dev/null
 ffmpeg -i 00004.MTS -vcodec mpeg4 -sameq -acodec copy -deinterlace -r 25
 -s 1440x1080 -t 1537 -pass 2 -an -passlogfile 00004.MTS -f rawvideo -y
 /dev/null
 ffmpeg -i 00004.MTS -vcodec mpeg4 -sameq -acodec copy -deinterlace -r 25
 -s 1440x1080 -t 1537 -pass 3 -passlogfile 00004.MTS 00004.MTS.t1537.mp4

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1686#comment:2>
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