[Libav-user] Detecting bit rate from live stream

[Taha Ansari]

Hi kalileo,

Thanks for the reply, yes I just tried this - i.e. looking at following
code:

    if(avformat_find_stream_info(this->pFormatCtx, NULL)<0)
        return -1; // Couldn't find stream information

    // Dump information about file onto standard error
    av_dump_format(this->pFormatCtx, 0, this->finalInputName.c_str(), 0);

At time of opening up decoder for live udp stream (like:
udp://localhost:8765/a.h264) is still giving me bit_rate '0'.


On Tue, Jan 22, 2013 at 10:35 AM, Kalileo <kalileo at universalx.net> wrote:

>
> On Jan 22, 2013, at 11:37 , Taha Ansari wrote:
>
> > Hi,
> >
> > I've been looking deeper into this, unfortunately so far I could not
> find a way to detect live stream's bit rate, or any way I could some how
> 'stuff' custom data (which would be bit rate in my case) with the encoder,
> and extract that on the network decoding end.
> >
> > Kindly, could anyone guide me how can I achieve this? Also any hints are
> most welcome...
> >
> > Thanks for your time...
> >
> > On Wed, Jan 16, 2013 at 12:48 PM, Taha Ansari <mtaha.ansari at gmail.com>
> wrote:
> > Hi!
> >
> > I am using h264 encoding to transmit video to destination network
> address using udp protocol. I also want to detect bit rate of the encoded
> frame on receiver end. In the pFormatCtx->bit_rate, and
> pCodecCtx->bit_rate, I see on receiver end, they are all zero. I understand
> since it is live streaming bit rate isn't stuffed there, but I would like
> to know if there is any way I could retrieve actual bit rate frame was
> transmitted on, on client side (i.e. decoder side decoding video over
> network).
> >
> > Can anyone kindly provide some guidance or tips on how to do this?
> >
> > Thanks for your time!
> >
>
> Did you try running  avformat_find_stream_info()  after opening the codec
> context and before checking the bitrate fields?
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ffmpeg.org/pipermail/libav-user/attachments/20130122/7f52c56b/attachment.html>