[FFmpeg-user] Cannot find a matching stream for unlabeled input pad 7 on filter Parsed_concat_2

Edward Park kumowoon1025 at gmail.com
Fri Oct 30 00:09:50 EET 2020


> Sorry Nicolas, but I think I am still confused.  I changed it to 16 and
> get the same error so I am thinking I am not understanding.

The concat filter should have [# of segments] × ([# of audio streams] + [# of video streams]), or n × (v + a) as specified to the filter. You seem to have 2 segments (n=2) with 2 streams (v=1:a=1) each. 

Ted Park

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