[FFmpeg-devel] Format for fast extraction (was: [PATCH] Dynamic plugins loading)

Michael Niedermayer michaelni
Mon Nov 1 23:28:06 CET 2010

On Mon, Nov 01, 2010 at 09:37:36PM +0100, Nicolas George wrote:
> Le primidi 11 brumaire, an CCXIX, Michael Niedermayer a ?crit?:
> > > (On the other hand, if anyone knows a supported format that allows efficient
> > > extraction of two 1-hour shows from a 3-hours recording with commercials, I
> > > would like to hear about it.)
> > 
> > where is the problem with existing formats? mpeg4/h264/mp3/aac in nut?
> They require a lot of disc-to-disc copy. With the example I chose, the
> original file will be about 6?giga-octets and requires two copies of
> 2?giga-octets each.
> The format I have designed splits the video into fragments of about 1?minute
> each, which makes them about 30 or 40 mega-octets, plus a global index.
> Extracting a segments uses mostly hardlinks, only the index and the
> fragments at the cut points are rebuilt. The whole thing is done in less
> than one second. As a bonus, it works even if the disk space is tight.

And you think you are the only person with this problem?
and thus there is no need to have this feature in svn?
and it would be better with a plugin architecture?

also the split program and using stdout with mpeg-ps or ts might already do
what you want approximately

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Those who are too smart to engage in politics are punished by being
governed by those who are dumber. -- Plato 
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