[x264-devel] Re: X264 Decoder

[Hilton Garcia Fernandes]

Sorry if that's been already discussed, but i'd like to ask why to
replicate the decoder effort of the libavcodec team ? 

Is it because libavcodec is too generic ? 

Thanks, 
Hilton

On Thu, Nov 10, 2005, Stephen Henry <Stephen.Henry at elixent.com> said:

> 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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-- 
Hilton Garcia Fernandes
Nucleo de Tecnologias sem Fio (NTSF) -- Wireless Technologies Team
Lab de Sistemas Integraveis Tecnologico (LSI) -- Integrable Systems Lab
Escola Politecnica (Poli) -- Engineering School
Univ S Paulo (USP)
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