[XviD-devel] Requantizing XviD video

[Andrew Voznytsa]

Hello,

oops, under "we did" I did not mean xvid team or any other opensource initiative. Sorry, my mistake.

As a matter of fact this tool was part of some commercial project related to 3GPP. As usual (in such case) I can't share anything including implementation details. 


Best regards,
Andrew Voznytsa

Bruno Harbulot wrote:

>Hello,
>
>I guess it's more a user question, but is there an application that can
>do this? I was unable to find it (or the right command line if such an
>application is mencoder or transcode).
>
>Best regards,
>
>Bruno.
>
>
> --- Andrew Voznytsa <av at polynet.lviv.ua> wrote: > Hello,
>
>  
>
>>>I've never seen it done anywhere, but is it (at least theoretically)
>>>possible to "requantize" an XviD video to reduce its size without
>>>re-encoding everything, in a similar way as it can be done with
>>>      
>>>
>>MPEG-2
>>    
>>
>>>streams?
>>>
>>>      
>>>
>>Yes, it is possible. We did this some time ago and it works 
>>(H.263("short header") - MPEG-4, MPEG-4 - MPEG-4, etc).
>>
>>    
>>
>>>If yes, would there be any specific requirements for the
>>>original video?
>>>
>>>Regards,
>>>
>>>Bruno.
>>> 
>>>      
>>>