> On Mar 11, 2022, at 6:07 AM, Weber, Patrick <[email protected]> 
> wrote:
> 
> 
>>> What is the ?codec ID??
> 
> While I was hoping you'd know, I rather expected this response. Let me ask 
> the customer which RFC/standard he's referring to & I'll get back with you. I 
> suspect he's looking for a media description with codec name & ID; here's his 
> question to me:
> 
> "When working with the video stream, the codec for the data stream is 
> reported as "Data: none". This is easily seen with the FFMPEG tool (ffprobe 
> rtsp://192.168.0.40/Primary). Generally when working with KLV data streams 
> the codec should be set to KLV (id: 100356). When you create the stream is 
> this something that you can specify?"

This doesn’t seem to have anything to do with the RTP stream (as defined, in 
this case, by RFC 6597 - which describes the RTP payload format for carrying 
this KLV data).  RFC 6597 doesn’t mention “codec” at all.

I suspect that the FFMPEG tool that your customer is using (“ffprobe”) just 
happens to not recognize this RTP payload format (“application/smpte336m”).  
And then your customer is getting confused, and thinking that there’s a problem 
with the KLV data in the stream, when there isn’t.  His ‘problem’ is likely 
just with “ffprobe”.


Ross Finlayson
Live Networks, Inc.
http://www.live555.com/


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