[Ffmpeg-devel] [RFC] mpeg2 422 encoding.

Ivan Kalvachev ikalvachev
Fri Mar 31 14:38:54 CEST 2006

2006/3/30, Baptiste COUDURIER <baptiste.coudurier at smartjog.com>:
> Hi
> Im trying to mod the mpeg2 encoder to use 4:2:2 profile.
> Here is a preliminary work, and results are correct for intra only
> streams. I will work on Long GOP encoding after.
> I would like your comments, especially from someone who really know
> mpeg2 specs, and knowing if Im really out or if im going into the right
> direction.
> Weighting is not yet taken into account (422 and 444 requires different
> coeffs).
> Next step for me would be to enable intra_vlc_format encoding. I just
> digged into the code and found that some support was envisaged (code is
> disabled in mpeg1_encode_block, but is here).
> Any hints to achieve that ?
> And finally supporting non linear q_scale_type.
> All this work is to support D10 encoding, widely used in editing systems:
> http://www.smpte.org/smpte_store/standards/pdf/s356m.pdf
> Thanks a lot.

Why are you adding only YUV422 support, the efforts needed to add
YUV444 are similar.

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