[Live-devel] Record a H265 stream from IP camera to file

[Ross Finlayson]

> On Sep 27, 2020, at 12:01 AM, Nicolas Julien <nicolas.julien at cdvi.com> wrote:
> 
> And the DESCRIBE answer :
[…]
> a=rtpmap:96 H265/90000
> a=fmtp:96 sprop-sps=Z00AMp2oCgAtabgICAoAAAMAAgAAAwBRCA==; sprop-pps=aO48gA==

It’s very unusual that your server is not including a “sprop-vps” parameter here.  (According to RFC 7798 - which defines the RTP payload format for H.265 aka. HEVC - this parameter is only ‘optional’; however, it’s very unusual for it not to be included here.)

The bigger problem, however, is that the "sprop-sps” and "sprop-pps” parameters do not appear to encode H.265 SPS and PPS NAL units.  Instead, they appear to encode H.264 NAL units instead.

In summary: Your server is broken.  It is advertising H.265, but its "sprop-sps” and "sprop-pps” parameters encode H.264 NAL units, not H.265 NAL units.  (Also, there is no “sprop-vps” parameter.)  You need to contact the manufacturer of your server, asking them to fix this bug.


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