[FFmpeg-devel] [OPW] OPW Project Proposal

Michael Niedermayer michael at niedermayer.cc
Thu Oct 27 00:54:28 EEST 2016

On Thu, Oct 27, 2016 at 12:40:53AM +0530, Pallavi Kumari wrote:
> I mean deciding a timeline for the opw project. Which is to be mentioned in
> application

its your application, you can choose whatever timeline you feel makes
As far as iam concered whats important is to finish the qualification
task well before we have to choose the applicant(s) we accept this

The timeline for the main project in dec-mar can be segmented as you
like but leave plenty of time toward the end, problems always occur
and things get delayed.
Also both for qualification and the main project submit code early
if you have questions ask early,
if you dont get satisfactory reply from me on something ask again and
louder/clearer ... i do sometimes also forget to reply until i then
remember again days later ...

also i think the architecture wasnt discussed much yet
do you have some plans about it ?

I mean for example there could be a avfilter that passes audio through
and adds fingerint(s) as metadata into thf AVFrame
(as with avpriv_frame_get_metadatap in vf_idet.c) and also print the
fingerprints via av_log()

a 2nd filter could then look these fingerprints from the metadata
up in some file/database

a 3rd one could add the fingerprints to the file/database

or these also could all be in one filter of course

this can be extended in the future to for example have a filter
delay the audio until lookup succeeds and then once identified
lookup lyrics online and add them or such (this of course would be a
future thing after outreachy/opw)

but maybe you have a different plan on how the components would
interact ?


> On Wed, Oct 26, 2016 at 6:01 PM, Michael Niedermayer <michael at niedermayer.cc
> > wrote:
> > Hi
> >
> > On Mon, Oct 17, 2016 at 02:06:26PM +0530, Pallavi Kumari wrote:
> > > Hi Michael,
> > >
> > > I figured out the use of fft. Help me with the time line setting. Thanks
> >
> > I dont understand the question,
> > if its about AVFILTER_FLAG_SUPPORT_TIMELINE*, please ignore this for
> > now, its not needed
> >
> > [...]
> > --
> > Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
> >
> > Rewriting code that is poorly written but fully understood is good.
> > Rewriting code that one doesnt understand is a sign that one is less smart
> > then the original author, trying to rewrite it will not make it better.
> >
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Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

He who knows, does not speak. He who speaks, does not know. -- Lao Tsu
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