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Use sequence parameter sets for h.264 keyframe detection.

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RFC 6184 Section 8.5.1 implies that the sender will send a
a sequence parameter set in response to PLI.  Since a keyframe is
useless without parameters, use the SPS to detect keyframes.
This commit is contained in:
Juliusz Chroboczek 2021-05-15 23:28:02 +02:00
parent f829da67e5
commit 4435a30a53
1 changed files with 2 additions and 2 deletions
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4
rtpconn/codec.go
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@ -150,7 +150,7 @@ func isKeyframe(codec string, packet *rtp.Packet) (bool, bool) {
return false, false
}
n := packet.Payload[i+offset] & 0x1F
if n == 5 {
if n == 7 {
return true, true
} else if n >= 24 {
// is this legal?
@ -171,7 +171,7 @@ func isKeyframe(codec string, packet *rtp.Packet) (bool, bool) {
// not a starting fragment
return false, true
}
return (packet.Payload[1]&0x1F == 5), true
return (packet.Payload[1]&0x1F == 7), true
}
return false, false
} else {