[x264-devel] Retrieve statistics from CABAC Entropy Encoder

[backgroundman]

Thank you for your answer. I will try the JM ref. decoder.



On Wed, Sep 8, 2010 at 1:08 PM, Loic <lll+vlc at m4x.org <lll%2Bvlc at m4x.org>>wrote:

> Hi,
>
> On Wednesday September 08 2010 at 12:03:52 PM +0300, backgroundman wrote:
> > Hi to all,
> >
> > I need to retrieve some informations/statistics from the encoding
> process.
> > I need statistics about the encoded bitstream before CABAC Entropy
> Encoder
> > process
> > (% of bits being Motion Vector Differences, % of bits being Macroblock
> > Quantization
> > Delta (Change), % of bits being Macroblock Type, and others).
> > Furthermore, I need statistics from the CABAC Entropy Encoder
> Binarization
> > process
> > (% use of Unary(U), Truncated Unary(TU), Fixed-Length(FL), k-th order
> > Exp-Golomb(EGk),
> > Unary/k-th order Exp-Golomb(UEGk) binarization scheme).
> >
> > 2. Is there any other program (free or commercial) that can retrieve
> these
> > information from an encoded video ?
>
> You can use the JM reference decoder. After decoding a stream, it
> outputs a trace_dec.txt (if enabled at compile time) which you can parse
> to get some of the information you want. At if you don't have enough
> information in trace_dec file, you can add the necessary logging in the
> code quite easily.
>
> You can get this program here: http://iphome.hhi.de/suehring/tml/
>
> Best regards
> --
> Loïc
>
> Only a very small fraction of our DNA does anything; the rest is all
> comments and ifdefs.
>
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