[FFmpeg-devel] Interlaced video decoder help needed

[Michael Niedermayer]

On Wed, Jul 21, 2010 at 09:14:11PM +0300, Kostya wrote:
> I've decided to extend lavc VC-1 decoder to handle at least some of
> interlaced video stuff. Looks like format with two fields is most
> common so I'm going to implement it first.
> 
> How can I make decoder handle field-interlaced video (modify strides for
> it, handle macroblock/draw_slice() stuff etc)? Finding answers in
> mpegvideo.c probably will double amount of work.

the decoder outputs frames consisting of 2 interlaced fields
you may or may not wish to double strides internally for decoding
this depends on which way its more convenient
SLICE_FLAG_ALLOW_FIELD switches between draw_slice returning field slices
or frame slices.

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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