[x264-devel] Re: X264 Decoder

[Stephen Henry]

I had a look at the decoder a while back, for the same reasons as
Dimosthenis suggested, but I quickly found that the shared code between
the encoder and decoder and since diverged quite significantly. It
actually took quite a lot of effort just to get the decoder to compile.
Many of the problems I was having wasn't the fact that the decoder code
was incomplete, in actually the majority of it had already been written,
it was the fact that because the "common" structures and functions to
the encoder and decoder appeared to change since the decoder was last
run. This meant that subtle bugs would creap into the decoder and would
be quite difficult and lengthy to track down where it had gone wrong.

To be honest, you might have better luck if you simply delete the
majority of the decoder code and simply build it up from stratch. It
would probably take  you less time overall...

Stephen

-----Original Message-----
From: x264-devel-bounce at videolan.org
[mailto:x264-devel-bounce at videolan.org] On Behalf Of Dimosthenis
STAMATIOU
Sent: 09 November 2005 15:16
To: x264-devel at videolan.org
Subject: [x264-devel] Re: X264 Decoder

Heejune AHN wrote:
> Thanks, Guillaume.
>
> So, you don't have any plan for decoder release anyway.
>
> Thanks for reminding me of ffmpeg. I forgot it. I rechecked it today.
but it sill has many "FIXME" and "incompleted functions" in my view. In
fact I searched archive for 5 months before November. I could't find the
same topics, just questions on how to build decoder t in Windows.
>
> Anyway, I should review ffmpeg h264.c and update x264 anyway for my
internal use.
>
> Thanks again!
> Heejune
>
>
>
>
>
>
>
>
>
> Hi,
>
> On 11/8/05, Heejune AHN <heejune at snut.ac.kr> wrote:
>   
>> Hi,  I am Heejune, quite new to this project, but I have experience 
>> with MPEG-2, MPEG-4  codecs.
>> After I found X264 is one of fast h264 codec in public domain, I am 
>> doing hard to catch up the progress.
>> Several question on the Decoder here.
>>     
>
>
> You should have dig the archives, all if not most of your questions 
> have been answered before.
>
>
>   
>>    -  How is going with the decoder part? why Encoder first ?
>>        Any due date for decoder part? We need decoder before the end 
>> of this year.
>>     
>
> FFmpeg features a state-of-the-art decoder already. There's no plan 
> that I know of to improve x264 decoder.
>
> Guillaume
> --
> Reading doesn't hurt, really!
>   -- Dominik 'Rathann' Mierzejewski
>
>   
Hi.

The fact that there's no plan of improving the internal x264 decoder
doesn't mean you're prohibited from doing such a thing, it's just that
the effort is mainly driven on improving the encoder first. Also, making
the internal decoder work would mean no longer having to download the
whole ffmpeg library just to decode x264(at least on Windows, that is).

Dimosthenis

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