[FFmpeg-devel] GSoC project (JPEG 2000)

Michael Niedermayer michaelni at gmx.at
Wed Mar 30 01:56:57 CEST 2011

On Sun, Mar 27, 2011 at 05:45:54PM -0700, rukhsana afroz wrote:
> Hi Michael,
> I was able to compile ffmpeg project with j2k files. Also, I was able to
> decode some j2k files with current decoder. My code is in the repository
> "git at github.com:rukhsana/j2k.git" and the j2k files i decoded with the
> current decoder are taken from the url

If you want to work on ffmpeg for SOC then you must rebase your
changes against the official ffmpeg tree,

> http://www.crc.ricoh.com/~gormish/jpeg2000conformance/. As a qualification
> task, you asked me before to fix some bugs in the j2kdecoder. Could you
> please tell me what exact bugs you guess in the current decoder?  With which
> exact input file (.j2k), will i be able to catch that bug? I am trying
> myself with some more files and also investigating the decoder's code.
> However, if you could give me some sort of directions where to go, that
> would be great for me. I truly appreciate all of your helps.

For example decodimng the files from codestreams_profile0
results in many 
 only LRCP progression supported
 error during processing marker segment ff52
and eventually a segfault

or try testfiles_jp2/file9.jp2

I thought i remember other errors too, but couldnt find them now


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

No great genius has ever existed without some touch of madness. -- Aristotle
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20110330/a4013670/attachment.asc>

More information about the ffmpeg-devel mailing list