[FFmpeg-user] Concat limited to certain file types?

Roger Pack rogerdpack2 at gmail.com
Tue Oct 16 23:36:09 CEST 2012


>>What is a command line that failed?
>
> For instance:
>
> ffmpeg -i S1000001.MP4 -i S1000002.MP4 -filter_complex "[0:0] [0:1]
>         [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a],scale=384:288"
>         -map [v] -map [a] -aspect 4:3 -vcodec libx264 -b:v 320k
>         -strict -2 -acodec aac -ab 96k -y out.mp4
> Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_scale_1


My guess is you need to provide an input to scale, like "[v] scale" ?
-r


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