[FFmpeg-user] Concat error - No such filter '[0,0]'

Nicolas George nicolas.george at normalesup.org
Thu Nov 15 12:43:51 CET 2012

Le quartidi 24 brumaire, an CCXXI, Mike Kavanagh a écrit :
> Thanks for your replies. Your post gives me hope that I can do this in the
> MS Dos OS. So, I reran the command with two different quote configs
> surrounding the filter_complex command:
> -1- double quotes filter_complex:  "cmd parameters"
>                                Get error: [AVFilterGraph @ 041d6da0] Too
> many inputs specified for the "concat" filter.

This is a progress: until now, you did not manage to get ffmpeg to
understand that you want the concat filter. This is now working, the quoting
is correct. You now have to resolve the inconsistency of the inputs you put
to concat and the number you set as options.

>                                              Error configuring filters.
> -2- double and single quotes: filter_complex  "'cmd parameters'"
>                           Get Error: [AVFilterGraph @ 003988a0] No such
> filter: '[0:0] [0:1] [1:0] [1:1] [2:0] [2:1]                                                                
> concat=n=3:v=1:a=0 [a] [v]'

n = 3, v = 1, a = 0 means 3×(1+0) = 3 inputs, and you gave 6. Please read
the doc for the meaning of the options.

> Command line:
> ffmpeg -i HV_movieAV10001.mp4 -i HV_movieAV10002.mp4 -i HV_movieAV10003.mp4
> -filter_complex "'[0:0] [0:1] [1:0] [1:1] [2:0] [2:1] concat=n=3:v=1:a=0 [a]
ffmpeg gets the single quotes as part of the argument, it should not. The
single quote is here in the example for the shell, not for ffmpeg.


  Nicolas George
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