[x264-devel] AVC Intra encoder based on libx264

[Sven Dueking]

Hi Jason,

I assume AVC Intra means conform to SMPTE 2027 (AVC Intra-Frame Coding
Specification for SSM Card Applications).
According to the spec, transform_8x8_mode_flag equal to 1 is just a
recommendation and there is no statement about the slice structure. That´s
different to the Panasonic specification, 8x8 transform and frame structure
using 10 slices with a fixed number of MBs (which results in the a new slice
in the middle) are both mandatory. 

Hope this helps and yes, it´s a mess :)

Sven

-----Ursprüngliche Nachricht-----
Von: x264-devel-bounces at videolan.org
[mailto:x264-devel-bounces at videolan.org] Im Auftrag von Jason Garrett-Glaser
Gesendet: Dienstag, 31. Januar 2012 01:43
An: Mailing list for x264 developers
Betreff: Re: [x264-devel] AVC Intra encoder based on libx264

On Mon, Jan 30, 2012 at 1:13 PM, Jason Garrett-Glaser <jason at x264.com>
wrote:
> On Mon, Jan 30, 2012 at 1:04 PM, Edward Richards
> <edward at edwardandalison.com> wrote:
>> Hi Jason,
>>
>> I just looked in the tarball and saw that at .\avci_encoder\x264\
provided 4
>> patch files and that they are patched against x264-snapshot-20120129-2245
>
> Oh, you're right.  Next question: doesn't AVC Intra require i8x8 only,
> or is that not the case?  I don't have the exact spec, but this code
> only seems to turn off i16x16.
>
> Also, why do we need slices in the middle of a line for this?
>
> Jason

While your patches helped, they were nowhere near insufficient to
satisfy the absurd demands of the spec (the SEI mess, exact frame
size, NTSC HRD incompatibility, etc, etc).  I've written my own full
implementation, which can be found on my github
(https://github.com/DarkShikari/x264-devel).

Testing welcome.

Jason
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