[FFmpeg-devel] [PATCH 2/5] fftools/ffmpeg: move parsing of -stats_* specifiers to lavu/parseutils

[Thilo Borgmann]

Am 13.12.23 um 13:08 schrieb Anton Khirnov:
> Quoting Thilo Borgmann via ffmpeg-devel (2023-12-13 13:05:35)
>> Am 13.12.23 um 13:00 schrieb Anton Khirnov:
>>> Quoting Thilo Borgmann via ffmpeg-devel (2023-12-11 16:07:22)
>>>> ---
>>>>    fftools/ffmpeg.h          |  31 +------
>>>>    fftools/ffmpeg_enc.c      |   3 +-
>>>>    fftools/ffmpeg_mux_init.c | 152 +++-----------------------------
>>>>    libavutil/parseutils.c    | 176 ++++++++++++++++++++++++++++++++++++++
>>>>    libavutil/parseutils.h    | 102 ++++++++++++++++++++++
>>>>    libavutil/version.h       |   2 +-
>>>>    6 files changed, 296 insertions(+), 170 deletions(-)
>>>
>>> Absolutely not.
>>>
>>> This is application code and does not belong in the libraries.
>>
>> How else do we not have a redundant copy of all that and make sure that -stats_* options and the filter understand the same {..} directives?
> 
> Why does that filter need to understand the same directives? No other
> filter does.

Because it is meant to use the file(s) the -stats_* option writes out. The most convenient and most error resilient way is to use the very same format string for -stats_* option as well as for the filter.

Otherwise it could be a 'usual' scanf-format, but then the user has to translate it from one format into the other - without making mistakes.
But that would also mean to update the filter (if someone realizes it) if the option ever changes.

-Thilo