support publishing with WebRTC (#1659) (#1786)

internal/formatprocessor/mpeg4audio.go

@@ -78,7 +78,7 @@ func (t *formatProcessorMPEG4Audio) Process(unit Unit, hasNonRTSPReaders bool) e
 		}
 
 		// decode from RTP
-		if hasNonRTSPReaders {
+		if hasNonRTSPReaders || t.decoder != nil {
 			if t.decoder == nil {
 				t.decoder = t.format.CreateDecoder()
 			}
@@ -108,3 +108,10 @@ func (t *formatProcessorMPEG4Audio) Process(unit Unit, hasNonRTSPReaders bool) e
 
 	return nil
 }
+
+func (t *formatProcessorMPEG4Audio) UnitForRTPPacket(pkt *rtp.Packet, ntp time.Time) Unit {
+	return &UnitMPEG4Audio{
+		RTPPackets: []*rtp.Packet{pkt},
+		NTP:        ntp,
+	}
+}