[FFmpeg-devel] [PATCH] fftools/ffmpeg_filter: add -print_filter_graph option

[Nicolas George]

Niklas Haas (HE12025-02-17):
> For the record, this approach seems to work well - adding a const char *label
> to the AVFilterPad struct and then setting it during
> avfilter_graph_segment_create_filters() recovers the full label names without
> any need for shenanigans.

Thanks for looking into it.

> That aside, how do you feel about scrapping the current ASCII art
> output entirely in favor of the new format? I think that it is, at the
> very least, providing just as much information, and IMO more readable.
> The ASCII art graph is not really enhancing clarity for me.
> 
> (Though given what Soft Works noted below, it may be a good idea to focus that
> version instead)

We need at least two formats: one easy to read for humans, one reliable
to parse for scripts. Therefore, we need a mechanism to select the
format. Under these circumstances, I see no merit in removing the
current format; somebody might have built something around it.

(Ideally, the computer-readable outputs should offer various formats:
JSON, XML, etc. For that, we would need to move into the library with a
proper API the code in ffprobe. And for that we need a good strings API.
Yet another thing blocked by the people blocking AVWriter.)

On the other hand, I do not object to a new format being made the
default.

Regards,

-- 
  Nicolas George