2016-11-04 22:38 GMT+08:00 Michael Niedermayer <mich...@niedermayer.cc>:
> On Fri, Nov 04, 2016 at 08:58:56PM +0800, Steven Liu wrote:
> > 2016-11-04 20:44 GMT+08:00 Michael Niedermayer <mich...@niedermayer.cc>:
> >
> > > On Fri, Nov 04, 2016 at 11:24:06AM +0800, Steven Liu wrote:
> > > > Add keyframe index metadata
> > > > Used to facilitate seeking; particularly for HTTP pseudo streaming.
> > > >
> > > > Reviewed-by: Lou Logan <l...@lrcd.com>
> > > > Signed-off-by: Steven Liu <li...@gosun.com>
> [...]
> > > > +static int flv_append_keyframe_info(AVFormatContext *s, FLVContext
> > > *flv, double ts, int64_t pos)
> > > > +{
> > > > + FLVFileposition *position = av_malloc(sizeof(FLVFileposition));
> > > > +
> > > > + if (!position) {
> > > > + av_log(s, AV_LOG_WARNING, "no mem for add keyframe
> index!\n");
> > > > + return AVERROR(ENOMEM);
> > > > + }
> > > > +
> > > > + position->keyframe_timestamp = ts;
> > > > + position->keyframe_position = pos;
> > > > +
> > > > + if (flv->filepositions_count) {
> > > > + flv->filepositions = position;
> > > > + flv->head_filepositions = flv->filepositions;
> > > > + position->next = NULL;
> > > > + } else {
> > > > + flv->filepositions->next = position;
> > > > + position->next = NULL;
> > > > + flv->filepositions = flv->filepositions->next;
> > > > + }
> > > > +
> > > > + flv->filepositions_count++;
> > > > +
> > > > + return 0;
> > > > +}
> > >
> > > an array should be more space efficient than a linked list
> > >
> > array have max limit, if this is used in recording living stream to flv,
> > maybe linked list is better than array.
>
> on what platform can you allocate more linked list entries (which have
> much more overhead) than an array ?
>
No, maybe you misunderstand me.
I mean, this is a vector, if is use array[n], i cannot sure what size set
to [n],
if use vector, it can dynamic allocateļ¼ just create keyframes list and moov
the keyframes list into metadata at the end.
look like avformat/movenc "faststart".
>
> The only i can think of are some addressing modes on 80286 but i would
> be very surprised if ffmpeg would run on this
>
>
> [...]
> --
> Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
> Freedom in capitalist society always remains about the same as it was in
> ancient Greek republics: Freedom for slave owners. -- Vladimir Lenin
>
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