[FFmpeg-devel] [PATCH v1 2/6] avfilter/af_silencedetect: document metadata

[Moritz Barsnick]

On Mon, Sep 30, 2019 at 21:36:43 +0800, lance.lmwang at gmail.com wrote:
> -The printed times and duration are expressed in seconds.
> +The printed times and duration are expressed in seconds. The @code{lavfi.silence_start}
> +or @code{lavfi.silence_start.X} metadata key is set on the first frame whose timestamp
> +equals or exceeds the detection duration and it contains the timestamp of the first
> +frame of the silence.
> +
> +The @code{lavfi.silence_duration} or @code{lavfi.silence_duration.X} and
> + at code{lavfi.silence_end} or @code{lavfi.silence_end.X}metadata keys are set on the
> +first frame after the silence. Where @code{X} is the channel number and .X is used
> +if @option{mono} is enabled.

I don't understand. Literal ".X" (which you should write as
"@code{.X}", by the way)? And if not mono, it's ".0", ".1"? And when is
".N" completely omitted?

This is a bit unclear to me, without experimenting or looking at the
code.

Cheers,
Moritz