Hi, I was surprised that RFC 4629 contains info about video formats. Thanks for advice!
> On 16 December 2010 15:05, <[email protected]> wrote: >> Hi All! >> >> There is 2 endpoint. >> Endpoint1 fmtp - 34 CIF=1 QCIF=1 >> Endpoint2 fmtp - 34 QCIF=1 CIF=1 >> >> How to define priority format properly? >> >> 1. Endpoint1 is caller, then priority format is QCIF=1 >> 2. Endpoint2 is caller, then priority format is CIF=1 >> >> right? > I'm not sure why your subjects says "re-INVITE", as the interpretation > of preferred order of these H.261/H.263 fmtp parameters applies to any > offer/answer - the initial or subsequent ones. > Anyway, what is important here is that the resolutions are listed in > the receiver's order of preference regardless of who initiates the > call. > In your example EP1 prefers receiving CIF and EP2 prefers receiving QCIF. > So, EP1 should send QCIF towards EP2, while EP2 should send CIF towards EP1. > Cf. detailed description in > http://tools.ietf.org/html/rfc4629#section-8.2.1 for what is called > "Picture sizes and MPI" parameters. > -- Tom -- С уважением, alex mailto:[email protected] _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
