[FFmpeg-devel] [RFC] Specifying KEYINT (-g) has no effect in libx264

[Etienne Buira]

On Sun, Jun 26, 2011 at 06:40:45AM -0700, Thomas Worth wrote:
> On Sat, Jun 25, 2011 at 8:46 PM, Michael Niedermayer <michaelni at gmx.at> wrote:
> > On Thu, Jun 09, 2011 at 12:06:16AM +0200, Etienne Buira wrote:
> >> On Wed, Jun 08, 2011 at 09:44:02PM +0200, Etienne Buira wrote:
> >> ...
> >>
> >> Sorry, the patch without noise is attached.
> >
> > the issue with this patch i see is that it requires continuous
> > maintaince to keep supporting all options in x264
> >
> > Iam not sure if we have someone who wants to do this kind of long term
> > maintaince. It also would be needed to follow x264 with short delay so
> > as not to lack features.
> >
> > To the lazy person that i am, my x264opts seems less work.
> 
> Are there any parameters that MUST be supplied with FFmpeg-native
> arguments, or is it possible to send ALL x264 parameters through
> x264opts? Example:
> 
> #!/bin/sh
> X264_OPTS=<args here>
> ffmpeg -i in.mov -an -vcodec libx264 -x264opts $X264_OPTS -y out.mp4
> 
> For what it's worth, I would prefer this over having a combination of
> FFmpeg args/x264opts.

x264opts is interpreted last before profile, so you can put almost every
x264 options there (with the exception of preset, tune, and
fastfirstpass).