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Slipstream
Asked: 2011-04-06 07:00:41 +0800 CST

How to automatically graph the output of a shell function

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I do a lot of video editing and processing, and spend a lot of time looking at the output of command line programs like ffmpeg. Ffmpeg produces a regular output of the form

frame=1234 fps=80 q=-1.0 size= 23456kB time=1234 bitrate=280.0kbits/s
frame=1237 fps=80 q=-1.0 size= 23678kB time=1258 bitrate=280.0kbits/s
...

my question is, is there a command line program that could automatically graph the output of this (preferably live)? so you could write

ffmpeg -i inputfile.avi -lotsofoptions -outputfile.avi > graphprogramorsomething

and it would produce a nice chart showing how the fps and things varied throughout the whole process.

Not really a mission critical request but would make the wait much nicer...

command-line

1 Answers

  1. Best Answer

    I don't know about the generation being done "automatically", but you can certainly automate it.

    Gnuplot might be your best bet.

    Here's a brief tutorial.

    Here's another method to extract some data from ffmpeg: http://forums.creativecow.net/thread/291/71

    xgraph and ploticus might also be of use.

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