Dana 1. 4. 2015. 16:30 osoba "Donny Yang" <w...@kota.moe> napisala je: > > On 2 April 2015 at 00:23, Michael Niedermayer <michae...@gmx.at> wrote: > > > On Wed, Apr 01, 2015 at 01:17:50PM +0000, Donny Yang wrote: > > > On 1 April 2015 at 23:28, Michael Niedermayer <michae...@gmx.at> wrote: > > > > > > > On Wed, Apr 01, 2015 at 12:07:46PM +0000, Donny Yang wrote: > > > > > On 1 April 2015 at 22:57, Paul B Mahol <one...@gmail.com> wrote: > > > > > > > > > > > On 4/1/15, Donny Yang <w...@kota.moe> wrote: > > > > > > > On 1 April 2015 at 17:03, Paul B Mahol <one...@gmail.com> wrote: > > > > > > > > > > > > > >> Dana 31. 3. 2015. 22:59 osoba "Donny Yang" <w...@kota.moe> > > > > napisala je: > > > > > > >> > +#include <zlib.h> > > > > > > >> > > > > > > >> This is missing dependency on zlib in configure. > > > > > > >> > > > > > > > Fixed > > > > > > > > > > > > > > > > > > > > > > > > > > But this is more appropriate for APNG encoder. APNG muxer seems to > > not > > > > > > use zlib at all. > > > > > > > > > > > It's used for it's crc32 functions for editing/creating chunks. > > > > > > > > please use libavutil/crc* > > > > > > > > > > I applied the following patch to my code, but ffmpeg's functions seem to > > be > > > producing the wrong crc32 value. > > > > > > For example: > > > $ crc32 <(printf "acTL\x00\x00\x00\x14\x00\x00\x00\x00") > > > 1c2df152 > > > While a `av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, > > > "acTL\x00\x00\x00\x14\x00\x00\x00\x00", 12)` returns 0xf6f7ccdd. > > > (using AV_CRC_32_IEEE_LE also produces an incorrect checksum) > > > > > > What am I doing wrong? > > > > http://www.w3.org/TR/PNG-CRCAppendix.html > > says: > > > > /* Update a running CRC with the bytes buf[0..len-1]--the CRC > > should be initialized to all 1's, and the transmitted value > > is the 1's complement of the final running CRC (see the > > crc() routine below)). */ > > > > Thanks. Patch has been updated. > > probably ok
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