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

[FFmpeg]

#1686: Dataloss because ffmpeg manpage about -passlogfile is wrong
-------------------------------------+-------------------------------------
             Reporter:  jonb         |                     Type:  defect
               Status:  new          |                 Priority:  critical
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  dataloss     |               Blocked By:
  ffmpeg manpage man passlogfile     |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 ffmpeg manpage about -passlogfile is wrong, it says:

 "-passlogfile prefix
 Set two-pass log file name prefix to prefix, the default file name prefix
 is ``ffmpeg2pass''. The complete file name will be PREFIX-N.log, where N
 is a number specific to the output stream."

 So based on that I felt it was safe to use the input filename as
 -passlogfile, but nooo, it was not safe, and my input files was
 overwritten, causing a dataloss :-(

 Command lines and ffmpeg output is attached as files.

 System is debian stable.
 ii  ffmpeg                  5:0.7.13-dmo2           audio/video encoder,
 streaming server & audio/video file conve

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