[Libav-user] Detecting bit rate from live stream

[Kalileo]

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?