[FFmpeg-devel] Intended behaviour encoding using libx264 and interlacing?

Michael Niedermayer michaelni at gmx.at
Mon Aug 1 12:02:19 CEST 2011

On Thu, Jul 21, 2011 at 02:15:32PM +0200, Erik Slagter wrote:
> Hi guys, here I am again with some nagging, sorry in advance.
> In order to get interlaced encoding using libx264 right, I have had to 
> trial-and-error with lots of combinations of options of both ffmpeg and 
> libx264.
> The outcome is that you need to use
>  * -top 1 (because ffmpeg doesn't always seem to guess it right, I've had 
> it wrong way around)
>  * -fflags +ildct (because the value of this flags overwrites the 
> params.b_interlaced value set from x264opts in libx264.c)
> The x264opts "tff=1" gets overwritten so it doesn't work.
> Is this intentional?

x264opts should not be overwritten, this looks like a bug


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The worst form of inequality is to try to make unequal things equal.
-- Aristotle
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