[Ffmpeg-devel] lzw compression in tiff encoder (qualification task for GSoC)

Baptiste Coudurier baptiste.coudurier
Fri Apr 6 16:53:27 CEST 2007


Michael Niedermayer wrote:
> Hi
> On Fri, Apr 06, 2007 at 03:30:43PM +0200, Baptiste Coudurier wrote:
>> Hi
>> Bartlomiej Wolowiec wrote:
>>> Hi,
>>> As a supplement to my qualification task for GSoC I implemented LZW 
>>> compressor. I think that my code is fast, universal and it can be easily used 
>>> in other encoders. My implementation use hash table with simple hash function 
>>> (I've used LZW prefix code and xor to calculate new hash value). So, I'm 
>>> sending two files: one with lzw encoder (lzw.patch) and one with patch to 
>>> tiffenc.c (tifflzw.patch). 
>> Good, you may be interested in using your lzw encoder with gif also,
>> which atm does not use lzw compression.
>> I also quickly tested tiff encoder, and unfortunately it does not play
>> in quicktime, if you can have a look.
> i think tiff in QT support is very low priority ...

That is a suggestion, and you already know that my goal differ.

Baptiste COUDURIER                              GnuPG Key Id: 0x5C1ABAAA
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