[FFmpeg-trac] #1516(undetermined:new): Possible dead loop while making snapshot from a MP4

[FFmpeg]

#1516: Possible dead loop while making snapshot from a MP4
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             Reporter:  tewilove     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by Cigaes):

 Them measure the time it took for 20, multiply it by 24, and wait that
 amount of time for your original 479.342, because that is the time
 necessary to decode and skip 479 seconds of HD video.

 You can add a kind of progress indication if you add this to the end of
 your command line: {{{-f framecrc -r 1 -an -sn -t 480 -}}}

 You could also speed-up things by putting {{{-ss}}} as an input option,
 but the time would be much less accurate as it would only jump to
 keyframes.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1516#comment:4>
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