[gst-devel] sequence header from "codec_data" for WMV VC-1 Advanced and Simple Main profiles.

[Felipe Contreras]

On Tue, Oct 21, 2008 at 4:29 AM, Ajitabh Saxena <ajitabhp at broadcom.com> wrote:
> Hi There,
>        Thanks for the information. I figured that it should be correct only. Now from the VC1 specs it says that  there is a 4 byte sequence strucutre (STRUCT_C) for simple and main profile. The fiels included are:
>
> PROFILE: 4bits
> FRMRTQ:3 bits
> BITRTQ_POST:5bits
> LOOPFILTER:1
> Res-3:1
> MULTIRES:1
> Res-4:1
> FASTUVMC:1
> EXTENDED_MV:1
> DQUANT:
> :
> :
> :
> Res6:1
>
> Though the total of this structure comes to 4 bytes. But when I see the metadata for simple/Main
> 0x4B 0xF1 0x0A 0x01
>
> The first two bits which designate the profile are set to Advanced profile.
> >From Specs it says that these bits are designated to be
>
> Value    -  Meaning.
> ==============================
>    0    - Simple Profile.
>    4    - Main Profile.
>    12   - Advanced Profile.
>
>
> Just also want to mention that for advanced profile the Metadata makes perfect sence and the data that I am getting is
>
> 27 00 00 01 0f DB BE 27 F1 67 88 80 00 00 01 0E 10 44 9F C5 9C 80
>
> Am I parsing the structure correctly. I know I am missing something.

I don't know how to parse the data, maybe you can take a look at FFmpeg.

-- 
Felipe Contreras