[FFmpeg-user] Please help confirm if this hard, system crash is reproducible

[Moritz Barsnick]

On Mon, Apr 06, 2020 at 06:29:48 -0400, Ted Park wrote:
> > is this a correct syntax if you specify only one input for amix? I'm not sure. Does it mean amix gets [a1] as the first input and sine as the second input, or vice versa?
> It is vice versa, I don’t know if it is proper syntax, something I
> picked up, or a shorthand I found to work, but I have thought of the
> comma as the same as a semicolon with all unlabeled outputs on the
> left being implicitly mapped to any unlabeled inputs on the right,
> with any necessary resamplers auto-inserted in between.

It is correct:
https://ffmpeg.org/ffmpeg-filters.html#Filtergraph-syntax-1

    If an output pad is not labelled, it is linked by default to the
    first unlabelled input pad of the next filter in the filterchain.

Moritz