[mpeg2] Re: Transport Stream for the kfir1 driver

["Deepak S Kotian" <dkotian1@rediffmail.com>]

Hi,

    Sorry,
    Did not work OK for us with this change.
    The result was the same.
    To give more input on this. The problem seems
    to be visible, when it is a fast moving DVD source
    only. The slow moving input source is OK for
    Transport stream.
    I hope there is a tunning factor in the driver
    for Kfir1 for these sources.
    Can there be more suggestions on these please ?


Thanks and Regards
Deepak



On Thu, 26 Sep 2002 Juergen Weiss wrote :
>Hi,
>
>as I already posted a while ago:
>
>There seems to be a problem with the calculation of
>the Bitrate for Transport Stream.
>
>Setting the TransportRate to
>
>     P->TransportRate = 
>vidrate+RateArray[kfir->Params.AudioBitRate] *
>1000;
>
>does not seem to be correct and leads to incorrect ts pcr fields.  
>The
>windows driver does not have a fixed relation between BitRate 
>and
>TransportRate.  With the following change, the problem went away. 
>Not
>sure, if this change solves your problem.
>
>         /*
>          * Rate of Transport Stream
>          * if choosen too low, ts pcr fields are wrong
>          * is there any formula for minimal transport stream 
>rate?
>          * a factor of 1.15 seems to work for
>          * bitrates at least between 0.8 to 4.5 MBit/s
>          */
>         P->TransportRate = 
>((P->BitRate+RateArray[P->AudioBitRate] *
>1000) * 115) / 100 + 80000;
>
>
>
>Juergen Weiss	  | Universitaet Mainz, Zentrum fuer 
>Datenverarbeitung,
>weiss@uni-mainz.de| 55099 Mainz, Tel: +49(6131)39-26361, FAX:
>+49(6131)39-26407
>
>
> > -----Original Message-----
> > From: Deepak S Kotian [mailto:dkotian1@rediffmail.com]
> > Sent: Thursday, September 26, 2002 9:19 AM
> > To: mpeg2@linuxtv.org
> > Subject: [mpeg2] Transport Stream for the kfir1 driver
> >
> >
> > Hi,
> >
> > I am using the Kfir1 driver for the LINUX.
> > We have observed, when we are using
> > Transport stream on the Kfir1 side and we
> > try our decoder, it takes more time
> > to decode, resulting in some delay.
> > The program stream seems to be OK.
> >
> > We have tired other encoder boards for
> > Transport stream, it seemed OK.
> >
> > Any idea/suggestion on how one
> > play with the Tranport Stream generated
> >  from Kfir1 board using the Kfir1 driver.
> > Please let me know
> >
> > Thanks and Regards
> > Deepak
> >
> >
> >
> >
> >
> >
>
>