> On Jul 8, 2020, at 6:38 AM, Matthew Czarnek <mczar...@edge360.com> wrote:
>
> Good catch, you're right about those looking strange.. I don't think I have
> been setting profile-level-id, I can't remember doing that anyway, how would
> I set that one?
Don’t worry about that; it comes automatically from the SPS NAL unit. So, the
SPS and PPS NAL units are all that you need to worry about here.
> Regarding sprop-parameter-sets, I'm still exploring but I believe that one is
> created from fSPSNAL and fPPSNAL, which appear to be set correctly, am I
> right?
> fPPSNALSize = 4
> fPPSNAL = "hî<€ýýýýd™Nõ"
>
> fSPSNAL = "gM"
> fSPSNALSize = 20
What are these variables? They don’t appear anywhere in our code; therefore
they must instead be somewhere in your code - most likely in your
implementation of “createNewRTPSink”, in the “OnDemandServerMediaSubsession”
subclass that you’ve written, as described here:
http://live555.com/liveMedia/faq.html#liveInput-unicast
I’m guessing that you’re using these variable as parameters to your call to
H264VideoRTPSink::createNew()
In which case there’s a much easier way for you to be doing this; see below.
> I know what it's supposed to be as I'm using ffmpeg to pull both
> sprop-parameter-sets and profile-level-id out of the file: a=fmtp:96
> packetization-mode=1;
> sprop-parameter-sets=Z00AKeKQDwBE/LgLcBAQHh4kRUA=,aO48gA==;
> profile-level-id=4D0029
> But I then parse it and turn it into the PPS and SPS, so Live555 can turn it
> back.
In this case, you know the "sprop-parameter-sets” string in advance. You don’t
need to convert this to binary yourself; instead you can just use the third
variant of “H264VideoRTPSink::createNew()” (see
“liveMedia/include/H264VideoRTPSink.hh”), and just call
H264VideoRTPSink::createNew(env, RTPgs, rtpPayloadFormat,
"Z00AKeKQDwBE/LgLcBAQHh4kRUA=,aO48gA==“)
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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