Thanks, If i need peer endpoint send 720p/15fps, how to do?
Like this:
m=fmtp:96
profile-level-id=42801f;max-fs=3600;max-mbps=3600*15(fps)?
But RFC 6184 indicated max-mbps must >= 108000( because in level 1f only
support 720p/30fps ).
or like this:
m=fmtp:96
profile-level-id=428014;max-fs=3600;max-mbps=3600*15(fps)?
But some device don't parse max-fs, maybe it repsonse with
profile-level-id=428014, both will
negotiate to 352*288(30fps).
On Thu, Dec 18, 2014 at 12:23 AM, Dale R. Worley <wor...@alum.mit.edu>
wrote:
>
> fan fan <sipgur...@gmail.com> writes:
> > I want peer endpoint know it's max video frame rate. How to do?
> > 1. I find a=framerate in SDP, but this is not use in other devices.
> > 2. I find max-fs, max-mbps maybe not work, because max-fs, max-mbps need
> > greater than is indicated in profile-level-id,
> > Sample H.264 -HD (720p) in SDP.
> > m=fmtp:96 profile-level-id=42801f
> > or
> > m=fmtp:96 profile-level-id=428014;max-fs=3600;max-mbps=108000
> >
> > but other devices only parse profile-level-id, this maybe wrong.
> >
> > Do you have other way, thanks!
>
> The details of SDP for H.264 are in RFC 6184 section 8, of course.
>
> But if a device does not parse the max-fs parameter (for example), that
> seems to be to be correct -- it simply does not support a higher frame
> rate than is specified in the profile. So the device's response would
> (I think) not include a max-fs, and the result of the negotiation would
> be that only the profile frame rate is to be used.
>
> Dale
>
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