[FFmpeg-trac] #4254(ffmpeg:new): Smarter FFmpeg — abort and do not write output when no input is supplied

[FFmpeg]

#4254: Smarter FFmpeg — abort and do not write output when no input is supplied
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             Reporter:  zmwangx      |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  normal       |                Component:  ffmpeg
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by zmwangx):

 Replying to [comment:1 Timothy_Gu]:
 > Well it was you the user who typed `-y`.

 It makes sense, especially when you are testing something over and over
 again, and don't want to confirm each time. And it is especially easy to
 make mistakes (e.g., accidentally deleting an `-i` from a long command
 line) after you've tested over and over again. After all, in no case —
 whether or not `-y` is present — should output be written when no input is
 supplied. No one willfully empties a file with `ffmpeg -y`, when there are
 much simpler and unambiguous ways like `cat /dev/null >`.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4254#comment:2>
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