[FFmpeg-devel] Fwd: GSoC: APNG

Donny Yang work at kota.moe
Tue Mar 24 22:54:07 CET 2015

On 25 March 2015 at 04:18, Michael Niedermayer <michaelni at 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
Also, my version doesn't output any ancillary chunks (yet - it's planned)
either, since this is just a "basic" version.

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