[Ffmpeg-devel] accessing compressed domain DC co-efficients for H.263

Michael Niedermayer michaelni
Thu Aug 4 21:38:53 CEST 2005


dont crosspost!

On Tuesday 02 August 2005 21:34, mark wrote:
> I need to access compressed domain DC co-efficients of I-frame for
> 3gpp video files [ H.263 ].

AVFrame.dct_coeff should contain these if you set FF_DEBUG_DCT_COEFF

> Is this possible to do with out decoding the entire video file?

yes a few steps can theoretically be skiped


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