In case 'Videoroom -> Streaming' with h.264 simulcast, Only a substream can be chosen.

Hyunseop Han

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Jul 2, 2019, 4:59:26 AM7/2/19

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Hello, everyone.

I tried simulcast broadcasting with h.264, but I cannot change to another substream by a configure command.

(VP8 is worked very well. But not h.264...)

My scenario is next:

chrome M75 -> Videoroom(rtpForward) -> Streaming -> chrome M75

I checked videoroom got two substreams, and streaming got two from videoroom by janus log.

But I cannot get high-quality substream, even I sent configure command with {substream:2}.

There is no change in substream's value. (always 0);

Then, I found #6827 line of janus_streaming.c .(https://github.com/meetecho/janus-gateway/blob/master/plugins/janus_streaming.c#L6827)

In the if sentence, janus looks like to support VP8 simulcast only on streaming_plugin.

So I put '|| janus_h264_is_keyframe(...)' in the sentence, finally, I got the high-quality substream1.

But I got SRTP protect error:srtp_err_status_replay_old when I choose low-quality substream0.

I think 2 Stream from Videoroom arrived at Streaming definitely.

Questions

1. Is streaming_plugin supported simulcast width h.264? I thought Videoroom supports it, so do streaming_plugin.

2. If streaming_plugin support it, are there any pieces of advice? please.

Thanks,

Hyunseop.

Lorenzo Miniero

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Jul 2, 2019, 7:15:59 AM7/2/19

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I can't remember if we ever tested H.264 simulcasting with the Streaming plugin, but it should work. I'll check later if there was any regression.

Lorenzo

Hyunseop Han

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Jul 3, 2019, 4:34:32 AM7/3/19

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Thanks for your answer.

I will try it more and report it if I get more info.

Hyunseop.

2019년 7월 2일 화요일 오후 8시 15분 59초 UTC+9, Lorenzo Miniero 님의 말:

Lorenzo Miniero

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Jul 4, 2019, 1:03:21 PM7/4/19

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Should be fixed in this commit (which also adds some more improvements, especially if RTCP is configured)

https://github.com/meetecho/janus-gateway/commit/d7037f9d3817c7e9d3d74c04aef835026b31ec54

Please let me know if that's not the case,

Lorenzo

Hyunseop Han

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Jul 4, 2019, 10:05:33 PM7/4/19

to meetecho-janus

With the commit, h.264 Simulcast is worked!

Thank you so much, Lorenzo!

2019년 7월 5일 금요일 오전 2시 3분 21초 UTC+9, Lorenzo Miniero 님의 말:

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