[FFmpeg-devel] [PATCH] avfilter: Added siti filter

[Paul B Mahol]

On Fri, Feb 19, 2021 at 9:03 PM Werner Robitza <werner.robitza at gmail.com>
wrote:

> On Mon, Feb 1, 2021 at 4:57 PM Nicolas George <george at nsup.org> wrote:
> >
> > Werner Robitza (12021-01-22):
> > > Thanks, I know this, but this is not a known format that can be easily
> > > parsed like a plain CSV file.
> >
> > What you need to do is to extend the metadata filter so that it lets
> > output to a file and choose the format.
>
> I suppose that would be the best option, yes. However, metadata comes
> in all kinds of shapes, so it's not easy to map arbitrary metadata
> (that any filter can generate) to a meaningful output format, in
> particular when the result should be CSV.
>
> In particular, such output should be tidy [1]. For instance, you don't
> want to output "frame, key, value" with lines "1, si, 53.999", but
> rather "frame, si, ti". Such transformations to useful/parsable output
> must be done in the filter itself, not vf_metadata …
>

Huh, that does not make any sense.


>
> [1]:
> https://cran.r-project.org/web/packages/tidyr/vignettes/tidy-data.html
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