[x264-devel] Re: x264 features

[Tran Minh Son]

Dear All
As I hint from the input parameters and also from the source codes, x264 
does not support SP, SI type of frame? It seems that interlaced video as 
well as flexible macroblock ordering are not supported either? Please 
correct me.
Thank you


Son Minh Tran a écrit :
> Dear Loren Merritt,
> Thank you for clarification.
> My question on Hamadard is just a part of my problem, would you please 
> give me more in detail the features of AVC that are supported by x264 
> ? From the feature list of x264 and the way of setting parameters 
> (also the different naming like hadamard) it is very difficult to 
> figure out.
> Thank you for your helps
> Regards
>
>
> Loren Merritt a écrit :
>> On Tue, 11 Apr 2006, Son Minh Tran wrote:
>>
>>> Dear All,
>>> Would you please let me know if the hamadard transform is 
>>> implemented  in x264, or only the DCT?
>>> Thank you
>>> Regards
>>
>> Yes, it is implemented. x264 usually calls it "SATD" for "sum of 
>> absolute transformed differences".
>>
>> But "or only the DCT" is misleading. Hadamard is not part of the 
>> H.264 standard, and is not an alternative to DCT. It is an 
>> encoder-side technique to improve speed and/or quality, and is also 
>> used in some mpeg-1/2/4 encoders.
>> (Well, hadamard is also part of the h264 intra 16x16 dc transform, 
>> but asking whether that's implemented is meaningless; it's required.)
>>
>> --Loren Merritt
>>
>

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