[FFmpeg-devel] DCT coeffs

Michael Niedermayer michaelni at gmx.at
Thu Oct 27 13:14:39 CEST 2011

On Thu, Oct 27, 2011 at 08:57:42AM -0200, Germán Milano wrote:
> Hi everyone,
> I'm trying to recover DCT coefficients while decoding h264 using FFMPEG
> libavcodec. It seems that in ff_h264_mb_decode_cabac, DCT coefficients are
> re-ordered (zig zag ordering).
> However i can't find where dequantification is made in order to find the
> right DCT elements.
> Can anybody help?

dequant is done during coefficient decoding

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Breaking DRM is a little like attempting to break through a door even
though the window is wide open and the only thing in the house is a bunch
of things you dont want and which you would get tomorrow for free anyway
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