On 6/25/15, Michael Niedermayer <michae...@gmx.at> wrote:
> On Thu, Jun 25, 2015 at 06:03:14PM +0000, Paul B Mahol wrote:
>> On 6/25/15, Michael Niedermayer <michae...@gmx.at> wrote:
>> > On Wed, Jun 24, 2015 at 05:49:35PM +0000, Paul B Mahol wrote:
>> >> Signed-off-by: Paul B Mahol <one...@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.
>
> right, this is slightly more complex, maybe we should add a
> av_get_double2/int2 that takes a class argument
> but something like this should work:
>
> class = avcodec_get_frame_class();
> ptr = av_opt_ptr(class, in, s->key);
> o = av_opt_find(&class, s->key, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ);
> switch (o->type) {
> ...
> }
For now I use sscanf(%f) and that works for ints too.
>
> [...]
> --
> Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
> What does censorship reveal? It reveals fear. -- Julian Assange
>
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