Re: Screen Sharing not working for H264 codec

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Micael Gallego

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Jun 12, 2019, 2:28:47 PM6/12/19
to Utkarsh Agarwal, OpenVidu, kur...@googlegroups.com, Ashish Verma
Please check if screen sharing is working with a browser. 

ios-rtc plugin, used to provide WebRTC in ionic apps in ios, it is based on a very old version of libwebrtc. It is possible that new versions of libwebrtc fixes the problem. The problem is that ios-rtc lib is not maintained right now.

OpenVidu dev team is working on other priorities right now. But if this issue is a blocker for your business, we can provide to you commercial services to evaluate the problem and try to provide a solution.

Best regards

El mié., 12 jun. 2019 19:52, Utkarsh Agarwal <utkarsh...@impressico.com> escribió:
Not due to cpu spike,but due to screen blur we are changing it to H264.

Cpu spike when server need to do transcoding of h264 to VP8.


Impressico-Business-Solutions-1079759

A CMMI Level 3

Impressico Business Solutions Pvt. Ltd.

B-134, Sector 6, Noida – 201301

Phone - 8860490789



On Wed, Jun 12, 2019 at 6:19 PM Utkarsh Agarwal <utkarsh...@impressico.com> wrote:
I have succesfully implemented Screen Sharing with VP8.
Due to server side CPU spike we have to move to H264.
But the stream is not visible on the other side with H264 while it was working completely fine with VP8.

I have made change in my video offer for supporting H264.

m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 127  -> This is for VP8


m=video 9 UDP/TLS/RTP/SAVPF 101 96 97 98 99 100 127  -> This is for H264





a=rtpmap:96 VP8/90000


a=rtcp-fb:96 ccm fir


a=rtcp-fb:96 nack


a=rtcp-fb:96 nack pli


a=rtcp-fb:96 goog-remb


a=rtcp-fb:96 transport-cc


a=rtpmap:97 rtx/90000


a=fmtp:97 apt=96


a=rtpmap:98 red/90000


a=rtpmap:99 rtx/90000


a=fmtp:99 apt=98


a=rtpmap:100 ulpfec/90000


a=rtpmap:101 H264/90000


a=rtcp-fb:101 ccm fir


a=rtcp-fb:101 nack


a=rtcp-fb:101 nack pli


a=rtcp-fb:101 goog-remb


a=rtcp-fb:101 transport-cc



Please suggest if i need to make some more changes for supporting H264.




Impressico-Business-Solutions-1079759

A CMMI Level 3

Impressico Business Solutions Pvt. Ltd.

B-134, Sector 6, Noida – 201301

Phone - 8860490789

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