I have tried changing the framerate by modifying the value of qcifMPI in H245Capabilities, but the framerate still couldn't be reduced from ~10FPS (Nokia C5) so I think it is like what you mentioned that the phones does not honor the parameter. There is no way to set the framerate on the phones I have seen so far.
On Mon, Aug 23, 2010 at 8:26 PM, Ram <[email protected]> wrote: > Kalimutu, > > If the video from the phone is of bad quality, there's nothing much you can > do. The quality of the video is dependent on the rate control algorithm and > in the 3g TDM world with 64 kbps total BW available, you cannot expect super > quality. One thing you probably can do is reduce the framerate,so that the > more bits are allocated to a frame and better quality is produced. But I am > not sure whether phones honor the framerate parameter during signaling. You > can try, or try if you can set the framerate using the 3g phone settings. > > Ram. > > > > > On Mon, Aug 23, 2010 at 12:10 AM, Kalimutu Singh <[email protected]>wrote: > >> I am using mp4save to record directly from a 3G phone. I thought H245 >> negotiation would always be required regardless of whether phone-to-phone or >> phone-to-asterisk. Please enlighten me on how to establish video calls >> without involving H245 nego in the case of phone-to-asterisk. >> >> Anyway, if both phones are same model, I think the quality might be better >> since both would has same H245 capabilities. Unfortunately I do not have a >> pair of same-model 3G phones to do such testing here. From my experience, >> even for phone-to-phone video calls using phones of same brand(Nokia N73 + >> Nokia C5), the quality is pretty bad too. >> >> Regards, >> Kalimutu >> >> On Mon, Aug 23, 2010 at 1:03 AM, Dan Julius <[email protected]> wrote: >> >>> Why should phone 2 phone quality suffer while recording? This shouldn't >>> require any transcoding. >>> >>> Dan >>> >>> On Aug 22, 2010 4:35 PM, "Ram" <[email protected]> wrote: >>> >>> kalimutu, >>> >>> r u transcoding the video or it is a direct record from a 3g phone. If >>> It's direct record, as Dan suggested, it depends on the encoding >>> capabilities of each phone. If the encoding is hardware based, you can't do >>> much. One other thing I've found is that whe I do phone to phone video >>> calls, quality is great, but if you do the H.245 negotiation and try to >>> record to your device, then quality suffers. >>> >>> Ram. >>> >>> On Mon, Aug 16, 2010 at 1:00 AM, Kalimutu Singh <[email protected]> >>> wrote: >>> >>>> > >>>> > Hi all, >>>> > >>>> > I am exploring options on how to improve the H324M/3G video calls >>>> recording qualit... >>>> >>>> > -- >>>> > _____________________________________________________________________ >>>> > -- Bandwidth and Colo... >>>> >>> >>> >>> >>> -- >>> Ram >>> >>> -- >>> _____________________________________________________________________ >>> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >>> >>> asterisk-video mailing list >>> To UNSUBSCRIBE or update options visit: >>> http://lists.digium.com/mailman/listinfo/asterisk-video >>> >>> >>> -- >>> _____________________________________________________________________ >>> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >>> >>> asterisk-video mailing list >>> To UNSUBSCRIBE or update options visit: >>> http://lists.digium.com/mailman/listinfo/asterisk-video >>> >> >> >> -- >> _____________________________________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> >> asterisk-video mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-video >> > > > > -- > Ram > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-video mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-video >
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