[FFmpeg-devel] JPEG 2000

Michael Niedermayer michaelni
Sun Mar 6 13:18:17 CET 2011

On Fri, Mar 04, 2011 at 05:50:23PM -0800, rukhsana afroz wrote:
> > On Wed, Feb 23, 2011 at 7:48 PM, Michael Niedermayer <michaelni at gmx.at
> >wrote:
> >a qualification task would be to choose a bug in the SOC jpeg2000 decoder.
> >IIRC when i tested it, it showed some artifacts/errors, fix one of these
> >artifact errors. This is hard and requires systematic comparission againt a
> >reference codec. That is adding lots of printf/av_log and comparing the
> outout
> >(unless you are very lucky in guessing where the bug is)
> Hi Michael,
> Is the encoder for JPEG 2000 complete?


> Also, could you please tell me the
> bug IDs of JPEG 2000 in the bug tracker, so that I can have a look at those
> bugs.

we never wrote proper bug reports sadly
but you can get the reference bitstreams from:

also you can use jasper / openjpeg or any othert j2k encoder to make files
and then try to decode them with the ffmpeg-soc decoder
and you could ask the previous students if they remember specific cases that

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

There will always be a question for which you do not know the correct awnser.
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