[Schrodinger-devel] dirac vs jpeg2k entropy modelling

[<javasharpdev@uk...>]

 Hi,

   I want to do some experiments with dirac and j2k and I have a
   question. As I see dirac's entropy modelling is totally different from
   that of j2k. It would be interesting to know the rationale behind it.
   In particular if the j2k's entropy modelling (together with the
   dirac's arithmetic encoder which as I understans is more effective
   than j2k's quasi-arithmetic encoder) what size decrease can be
   expected?

   Thanks in advance,
   Vladimir

Re: [Schrodinger-devel] Encoding a Video sequence using Schroedinger-1.0.10

[David Schleef <ds@en...>]

On Wed, Oct 27, 2010 at 04:25:58PM -0500, Vishesh Kalra wrote:
> Hi there,Good day!I am currently trying to have an analysis of
> Schroedinger-1.0.10
> <http://diracvideo.org/2010/03/schroedinger-1-0-9-released/>Encoder
> for encoding a video sequence with .yuv as input . The thing which is
> bothering me is that i couldn't find any tutorial which can lead me how to
> setup the compiler and proceed with an example. It would be awesome if you
> help me in this regard. An Explanation about how to do the setup and encode
> a sequence by enforcing the parameters(changing the quant parameter/bit
> rate) will clearly head me into right direction.Thank you so much for your
> time and patience.Regards,Vishesh

I recommend using existing applications for encoding, for example,
Transmageddon (which uses GStreamer), FFmpeg, ffmpeg2dirac, or
gst-launch for more low-level control.

If you are writing an encoding application, you should look at the
source code for the above, and also the testsuite/encode program.
There is also reference documentation.



David