[Ffmpeg-devel] [PATCH] DV Tune Up

[Roman Shaposhnik]

Hi

On Wed, 2006-11-22 at 02:30 +0100, Baptiste Coudurier wrote:
> > --- libavcodec/dv.c.orig	2006-11-01 12:21:43.000000000 -0600
> > +++ libavcodec/dv.c	2006-11-14 16:17:10.156250000 -0600
> > @@ -1096,7 +1096,8 @@
> >       *   2. It is not at all clear what STYPE is used for 4:2:0 PAL
> >       *      compression scheme (if any).
> >       */
> > -    int apt = (c->sys->pix_fmt == PIX_FMT_YUV420P ? 0 : 1);
> > +    int apt = (c->sys->pix_fmt == PIX_FMT_YUV420P || c->sys->pix_fmt == PIX_FMT_YUV411P) ? 0 : 1;
> 
> IIRC, dv ntsc 411p in ffmpeg is coded according to SMPTE 314M and
> therefore requires apt to be 1.
> 
> Only DV 420p (DVCAM) is following IEC specs.

  You are absolutely correct.

Thanks,
Roman.