[FFmpeg-devel] [RFC] [WIP] [PATCH] lavfi: add drawgraph filter

[Paul B Mahol]

On 6/25/15, Michael Niedermayer <michaelni at gmx.at> wrote:
> On Wed, Jun 24, 2015 at 05:49:35PM +0000, Paul B Mahol wrote:
>> Signed-off-by: Paul B Mahol <onemda at gmail.com>
>> ---
>> Example:
>>
>> ffplay movie.webm -vf
>> signalstats,drawgraph=lavfi.signalstats.YAVG:min=0:max=255:mode=0
>>
>> ---
>>  libavfilter/Makefile       |   1 +
>>  libavfilter/allfilters.c   |   1 +
>>  libavfilter/vf_drawgraph.c | 186
>> +++++++++++++++++++++++++++++++++++++++++++++
>>  3 files changed, 188 insertions(+)
>>  create mode 100644 libavfilter/vf_drawgraph.c
>
> nice, i like this filter!
>
>
> [...]
>> +    metadata = av_frame_get_metadata(in);
>> +    e = av_dict_get(metadata, s->key, NULL, 0);
>
> this could be extended to also support AVOptions
> aka av_get_double(in, s->key...)

Hmm, this doesn't work.

>
> LGTM otherwise
>
> [...]
> --
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
> The educated differ from the uneducated as much as the living from the
> dead. -- Aristotle
>