On Tue, Mar 24, 2015 at 09:54:07PM +0000, Donny Yang wrote: > On 25 March 2015 at 04:18, Michael Niedermayer <michae...@gmx.at> wrote: > > > the generated png files seem to differ > > > > ./ffmpeg -i lena.pnm ref.png > > > > -rw-r----- 1 michael michael 180438 Mar 24 18:11 after-patches.png > > -rw-r----- 1 michael michael 180987 Mar 24 18:14 before-patches.png > > > > It's because the non-APNG version breaks the data into lots of small IDAT > chunks whereas mine puts it in one big chunk - but are functionally the > same.
is there any advantage for multiple small IDATs ? if not i suggest to make the IDAT change to png as well in a seperate patch so that a single frame APNG and PNG produce identical data and especially so that the introduction of APNG does not change PNG files > Also, my version doesn't output any ancillary chunks (yet - it's planned) > either, since this is just a "basic" version. > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > -- 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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