[x264-devel] Multislicing support

[Etienne Bömcke]

Hi Mojtaba,

I finally had some time to look at your patch, but it seems that the  
archives of last year's mails has been erased and is not accessible  
anymore. Could you please forward me Lorren's mail you mentioned in  
the following mail? I also wanted to ask you some pointers about how  
to make the slice headers array a dynamically growing array, instead  
of a hard-coded 8 elements array as it is now.
Furthermore, I'm afraid I won't be able to merge our two patches, as  
they don't really do the same thing. My patch breaks a frame in  
multiple slices, forbidding both spatial and temporal prediction  
between different slices. If I followed your method, I wouldn't have  
any access to the prediction constraints.
Anyway, I'll try to correct my code in order to get the ratecontrol  
algorithm to work properly, hopefully I'll be able to obtain something  
cleaner than it is in its current state.

Regards,

Etienne


On 16 Jan 2008, at 16:08, Mojtaba Hosseini wrote:

>
>> -----Original Message-----
>> From: x264-devel-bounces at videolan.org on behalf of Etienne Bömcke
>> Sent: Wed 1/16/2008 7:49 AM
>> To: Mailing list for x264 developers
>> Subject: Re: [x264-devel] Multislicing support
>
>> I noticed that encoding a sequence in multiple slices breaks the rate
>> control part of x264. It seems that the rate control is applied to
>
> Is this with the patch you emailed (where each slice has N  
> macroblocks)?
> When implementing multi-slice support (where each slice break  
> happens at
> a byte size threshold), I did not run into this problem.
> In fact, Loren Merritt explained that rate control and multiple slices
> are independent of each other here:
>
> http://mailman.videolan.org/pipermail/x264-devel/2007-October/003678.html
>
> So perhaps it is not the multiple slices that breaks the rate  
> control but
> the way you implemented it?
> (Read Loren's email in the link above for other very useful  
> information
> about multi-slice report like how to test your patch, what to look for
> and related issues)
>
> Mojtaba
> <winmail.dat>_______________________________________________
> x264-devel mailing list
> x264-devel at videolan.org
> http://mailman.videolan.org/listinfo/x264-devel

--
Etienne Bömcke
UCL - Laboratoire TELE
etienne.bomcke at uclouvain.be



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