[x264-devel] Fixed IDR Frame Intervals

[Richard Buteau]

> -----Original Message-----
> From: x264-devel-bounces at videolan.org [mailto:x264-devel-
> bounces at videolan.org] On Behalf Of Jason Garrett-Glaser
> Sent: Monday, April 25, 2011 2:38 PM
> To: Mailing list for x264 developers
> Subject: Re: [x264-devel] Fixed IDR Frame Intervals
> 
> On Mon, Apr 25, 2011 at 7:48 AM, Richard Buteau
> <rbuteau at rgbnetworks.com> wrote:
> >
> >> -----Original Message-----
> >> From: x264-devel-bounces at videolan.org [mailto:x264-devel-
> >> bounces at videolan.org] On Behalf Of Jason Garrett-Glaser
> >> Sent: Sunday, April 24, 2011 3:49 AM
> >> To: Mailing list for x264 developers
> >> Subject: Re: [x264-devel] Fixed IDR Frame Intervals
> >>
> >> On Sat, Apr 23, 2011 at 8:00 AM, Stefan Lederer
> <ledererstefan at gmx.at>
> >> wrote:
> >> > Hello,
> >> >
> >> >
> >> >
> >> > I want to encode content for http streaming and therefore I would
> >> need fixed
> >> > IDR frame intervals (e.g. at least frame nr. 1, 51, 101 ... have
> to be
> >> IDR
> >> > Frames). I already tried -keyint 50 as parameter for the encoding,
> >> but as
> >> > far as I understood, this option does not guarantee that the IDR
> >> frame is at
> >> > position 50 because it could also be somewhere between 1 and 50?
> >> >
> >> > In there any possibility for the encoding to set fixed IDR frame
> >> positions?
> >>
> >> --scenecut 0
> > Is there a way to generate just an I frame instead of IDR on scenecut
> and keep the same gop?
> 
> There's no benefit to such a thing.
Assuming you have a requirement of having fix GOP size and you want to have best possible video quality. 
I was assuming that using I frame to handle the scene change would results in a better output than a P or B frame. What is wrong with that?

> 
> Jason
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