1169590 - Answer created by Firefox has inactive SDP with NULL video codec if no video codecs matches with offered ones

Status: RESOLVED DUPLICATE of bug 1113443

(Core :: WebRTC, defect, P3)

Description

[Ugurcan]

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.73 Safari/537.36

Steps to reproduce:

A legacy device calls Firefox with Video.
Firefox answers with video.
Sdp generated by Firefox has NULL video codec.


Actual results:

A device creates offer with codecs unsupported by Firefox like(I wrote just the video m-line); 

m=video 36596 RTP/SAVPF 97 34 98 99
c=IN IP4 47.168.150.163
b=AS:197
a=rtpmap:97 H264/90000
a=fmtp:97 profile-level-id=42801F
a=rtpmap:34 H263/90000
a=fmtp:34 CIF=3;QCIF=3;SQCIF=3;F=1
a=rtpmap:98 H263-1998/90000
a=fmtp:98 CUSTOM=640,480,3;CIF=3;QCIF=3;SQCIF=3;F=1;I=1;J=1;R=1;T=1
a=rtpmap:99 MP4V-ES/90000
a=fmtp:99 profile-level-id=1
a=maxprate:16.00
a=framerate:8.0
a=sendrecv
a=fingerprint:sha-256 57:7D:D1:3E:B9:5E:05:48:F6:6E:42:E6:F4:53:53:87:ED:AB:AC:50:8B:DB:9E:60:57:62:DE:A6:A8:05:75:91
a=setup:actpass
a=ice-pwd:J1TXt/Lun7I4R8h9OR6+D/Z9IZMK5XAr
a=ice-ufrag:X9F787Emc5BdfJ9uzHAytiEFE7bcIix2
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:aOtaGtlPFlsD6zP8YuYB978Ovnnm18Nds4yy8d6B
a=rtcp:36597 IN IP4 47.168.150.163
a=candidate:1 1 udp 2113937151 47.168.150.163 36596 typ host generation 0
a=candidate:1 2 udp 2113937151 47.168.150.163 36597 typ host generation 0

Codecs missmatched, so that Firefox should generate an answer with inactive video m-line, but instead Firefox generates a SDP with NULL video codec.

m=video 0 RTP/SAVPF 111
c=IN IP4 0.0.0.0
a=inactive
a=ice-pwd:jyeulDZ9THsVh8aJ+j7OtZ+4qFqEOB73
a=ice-ufrag:VMNVNVykc6kbrGP4zS7EscG7KAjeIOeM
a=rtpmap:111 NULL/0





Expected results:

Firefox should generate inactive SDP with codec set that Firefox can handle, but instead Firefox generates an SDP with NULL codec which leads to error in originator side.