[Opalvoip-devel] H.323 video-size and resolution downgrade bug

[Alexander S. <ale...@gm...>]

   Got another problem with polycom and conopal. It happens if I 
manually setup preferred video resolution (720p) in conopal and connect 
to Polycom which can only receive a smaller video resolution (h264 level 
2.1) but can send a higher resolution (720p). As result during 
negotiations and startup phase mediaformat and encoder first downgrade 
to CIF:

   0:00.209          H.245 Handler:16421     mediafmt.cxx(1331) 
MediaFormat     Merging H.264-1 into H.264-1
   0:00.209          H.245 Handler:16421     mediafmt.cxx(1331) 
MediaFormat     Merging H.264-1 into YUV420P
   0:00.209          H.245 Handler:16421     mediafmt.cxx(266) 
MediaFormat     Changed media option "Frame Height" from "720" to "576"
   0:00.209          H.245 Handler:16421     mediafmt.cxx(266) 
MediaFormat     Changed media option "Frame Width" from "1280" to "352"
   0:00.209          H.245 Handler:16421     mediafmt.cxx(266) 
MediaFormat     Changed media option "Max Bit Rate" from "1382400000" to 
"1024000"
   0:00.209          H.245 Handler:16421     mediafmt.cxx(266) 
MediaFormat     Changed media option "Max Rx Frame Height" from "1080" 
to "576"
   0:00.209          H.245 Handler:16421     mediafmt.cxx(266) 
MediaFormat     Changed media option "Max Rx Frame Width" from "1920" to 
"352"
....
   0:00.263          H.245 Handler:16421    h264-x264.cxx(773) 
x264            Applied options: prof=66 lev=21 res=352x576 fps=30 
bps=1000000 period=1000 RTP=1400 NALU=1400 TSTO=31 Mode=1

  and next get back to 720p:

   0:00.269          H.245 Handler:16421     mediafmt.cxx(1331) 
MediaFormat     Merging H.264-1 into H.264-1
   0:00.269          H.245 Handler:16421     mediafmt.cxx(266) 
MediaFormat     Changed media option "Frame Height" from "576" to "720"
   0:00.269          H.245 Handler:16421     mediafmt.cxx(266) 
MediaFormat     Changed media option "Frame Width" from "352" to "1280"
   0:00.269          H.245 Handler:16421     mediafmt.cxx(1331) 
MediaFormat     Merging H.264-1 into YUV420P
   0:00.269          H.245 Handler:16421     mediafmt.cxx(266) 
MediaFormat     Changed media option "Frame Height" from "576" to "720"
   0:00.269          H.245 Handler:16421     mediafmt.cxx(266) 
MediaFormat     Changed media option "Frame Width" from "352" to "1280"
....
   0:00.286          H.245 Handler:16421    h264-x264.cxx(773) 
x264            Applied options: prof=66 lev=21 res=1280x720 fps=6 
bps=1000000 period=1000 RTP=1400 NALU=1400 TSTO=31 Mode=1

As result tx video frame failing with a incorrect buffer size:

   0:00.346               Tx video:16463  rtp_session.cxx(1257) 
RTP             Session 2, SSRC=321345223 (0x132756c7), sending (forced) 
empty ReceiverReport
   0:00.346               Tx video:16463  rtp_session.cxx(1299) 
RTP             Session 2, SSRC=321345223 (0x132756c7), sending SDES 
cname="dl056bmuVh+UNLzue1xTfQ"
   0:00.346               Tx video:16463  rtp_session.cxx(1409) 
RTP             Session 2, sent 1 forced reports: status=1
   0:00.346          H.245 Handler:16421 opalpluginmgr.cx(625) 
OpalPlugin      Setting encoder options: H.264-1 res=1280x720 target=960000
   0:00.346               Tx video:16463    mediastrm.cxx(1329) 
Media           Tried to read with insufficient buffer size - 304160 < 
1382400
   0:00.346               Tx video:16463        patch.cxx(781) 
Patch           Thread ended because source read failed on 
14OpalMediaPatch[0x7fa3000e65e0] 
20OpalVideoMediaStream[0x7fa30011c5b0],Source,YUV420P,2 -> 
18OpalRTPMediaStream[0x7fa30007b5c0],Sink,H.264-1,2

Full logs and packet dumps I will send directly to Robert and anyone 
else interested.