SDP Generated by NWRenderer Filter (not playing in QuickTime player)

[efg_2K]

Hi guys, I've been doing tests with your SDK, I built an application in order to show my boss all benefits of buying the SDK, but something strange happens when I try to play an mp4-es in quicktime, here's what I did.


WebCam --> EInfTee --> EColorSpaceConverter2-->VideoRenderer
                             |
                             --> EMPEG4EncoderCIF->ENWRenderer (to a DSS)

When I try to play it in Qtime player starts to show new square video area dimensions (320x240) but it didn't start to show the video stream just a Black Square and no video

Here's the SDP generated by NWRenderer:

v=0
o=- 1239222038 37 IN IP4 myIP
s=Elecard NWRenderer
i=Elecard streaming
u=http://www.elecard.com
e=tsup@elecard.net.ru
c=IN IP4 DDSIP/64
a=ISMA-compliance:1,1.0,1
m=video 1232 RTP/AVP 97
a=rtpmap:97 MP4V-ES/90000
a=control:trackID=1
a=fmtp:97 profile-level-id=255; config=000001B002000001B50900000100000001200086C4EA6285020F0A487F000001B220456C6563617264204D5045472D3420566964656F20456E636F64657220
a=mpeg4-esid:201

I think there's a problem in the config parameter due I build in the past other application and I obtained an sdp like this:

v=0
o=- 1190007077 1190007077 IN IP4 sourceIP
c=IN IP4 DestinationIP
t=0 0
m=video 1232 RTP/AVP 96
a=rtpmap:96 MP4V-ES/90000
a=fmtp:96 profile-level-id=1;config=000001b008000001b509000001000000012000844007a82c2090a21f
a=control:trackID=1

When I try to use the last config parameter in the SDP generated by your filter qtime start to play somekind of garbage video, green squares and some movement but not the stream well decoded.

Can you put me in right direction in order to complete this demo and buy your SDK, one of our  requirements it's to probe that can be played in qtime and without this we can't procede to buy it.

[IrinaM]

Hi efg_2K.
We haven`t face with the problem described by you yet. We need to check it and it will take some time.
Please contact our Support team (tsup(at)elecard.net.ru) and we`ll try to help you as soon as possible.

Thank you in advance!

[efg_2K]

Hi guys, I think there's a problem in your NWRenderer Filter (when you're using MP4 encoder), when it creates the SDP File the config parameter has the MP4 Header pattern, but its incorrect.

The filters generates thisone:

config=000001B002000001B50900000100000001200086C4EA6285020F0A487F000001B220456C6563617264204D5045472D3420566964656F20456E636F64657220

But In order to play  a MP4 stream in quicktime you must change it to this one:

config=000001b0f3000001b50900000100000001200086c4ea6285020f0a21

This is the header pattern of your MPEG-4CIF encoder.

[IvanR]

Thank you for your feedback. We will check it, but it will take some time.
Please write an email to tech. support and we will answer you when we finish.