[FFmpeg-devel] [PATCH] avfilter/af_astats: export metadata

[Paul B Mahol]

On 6/30/15, Dave Rice <dave at dericed.com> wrote:
> Hi Paul,
>
>> On Jun 29, 2015, at 7:40 PM, Paul B Mahol <onemda at gmail.com> wrote:
>>
>> Signed-off-by: Paul B Mahol <onemda at gmail.com>
>> ---
>> doc/filters.texi        | 35 ++++++++++++++++++++++
>> libavfilter/af_astats.c | 80
>> +++++++++++++++++++++++++++++++++++++++++++++++--
>> 2 files changed, 113 insertions(+), 2 deletions(-)
>
> I tested the metadata astats filters with the latest drawgraph patch. I find
> this adds a lot of ability to visualize audio information. Here's a few
> comments from testing.
>
> I suggest adding a reset_count/reset option similar to what is in
> cropdetect, so that audio information could either be graphed frame-by-frame
> or summarized as it accumulates.

Like in attached patch?

>
> With my samples the filter defaulted to an audio frame size of 1024. I
> realize that I could set asetnsamples before astats to change that, but
> could the audio frame size be set within the astats filter.

It could, but to what value? I do not like duplicating functionality if it
is not strictly necessary.

>
> Thanks so much,
> Dave Rice
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