help request on Janus+Rtsp streaming

[Fabio Zingaro]

Hi all,

i'm sorry if i'm asking something obvious for you.

I've a linux box with Janus for showing with webrtc a couple of ip cams (a bosch and a dahua).

I'm new to Webrtc, Janus, Sdp, etc.

If a direct help to my problems is not possible i'll appreciate a lot also some suggestions on books, ebooks, etc for letting me to solve myself these problems.

I've tried also reading logs on the admin panel, but with my actual knowledge i cannot understand what's wrong and what's fine.

I'm using latest stable versione of Janus (v0.9.2), Firefox (75), Chrome (81).

I've tried also the latest Janus master version on github with the same results.

Actually i've 2 problems:

1. Bosch stream is working only on Firefox 75.0 on mac osx. On Chrome 81 i've some errors. (see screenshot)
2. Dahua stream isn't working at all

I've tried also Safari and Vivaldi obtaining the same result of Chrome (but on Safari different error).

This is the main part of my janus.plugin.streaming.jcfg:

TC1: {

type = "rtsp"

        id = 103

        description = "TC1"

        audio = false

        video = true

url = "rtsp://......./rtsp_tunnel?profile=1&inst=2&h26x=4"

rtsp_user = "user"

        rtsp_pwd = "pwd"

videofmtp = "profile-level-id=42e01f;packetization-mode=1"

}

I've omitted the dahua (TC2) config since it's identical to the TC1.

On Janus start i've:

[ERR] [plugins/janus_streaming.c:janus_streaming_rtsp_connect_to_server:5769] Couldn't send DESCRIBE request: Timeout was reached

[ERR] [plugins/janus_streaming.c:janus_streaming_init:1888] Error creating 'rtsp' mountpoint 'TC2'...

I've tried also on capturing the Dahua stream with ffmpeg and redirecting it to a Janus RTP port (after proper config on the plugin cfg) with no success.

TC2-rtp: {

type = "rtp"

        id = 104

        description = "TC2-rtp"

        audio = false

        video = true

        videoport = 8004

        videopt = 126

videortpmap = "H264/90000"

        videofmtp = "profile-level-id=42e01f;packetization-mode=1"

}

When ffmpeg starts on Janus console i see:

[TC2-rtp] New video stream! (ssrc=336439608, index 0)

The video is not showing on Firefox and on console i see a periodic "slowlink" event but ffmpeg and janus are on the same machine and the IP cam is on the same net.

Thank you in advance at who will help me.

Bye.

Fabio

[Fabio Zingaro]

no one has ideas and suggestions?

[Fabio Zingaro]

no one has ideas and suggestions?

[Mirko Brankovic]

Hi,

My guess you have a problem with H264 profile.

Only a baseline profile can be used at this point.

I see you have base profile in settings profile-level-id=42e01f;

Could be a browser bug also, I don't have experience with streaming that much :D

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Regards,

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[Lorenzo Miniero]

Definitely a codec issue, as we just relay media. H.264 support across browsers is inconsistent, and may vary wildly depending on whether hardware acceleration is used or not.

L.

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Regards,

Mirko

[Lorenzo Miniero]

Besides, the H.264 may be lacking SPS/PPS info in packets (in some cases they're sent only once when the stream is started by the encoder), which are needed to decode. If so, you'll have to inject them yourself (e.g., with the help of gstreamer of ffmpeg).

L.

[Vikas Sharma]

fabio were you able to have this stuff working ? 

can you please let me know 

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Regards,

Mirko

[Carlos Primo]

Hi, I detected also problems with the stream of a BOSCH Autodome IR 5000 camera.

At first, I tried to connect to main or secondary stream of the camera, with no luck.

After that, I  change the value of the bitrate compensation, and then, i can see an image every 2 second.

Later, i modified the GOP structure to IP value, and then, the camera started to work perfectly (At full hd resolution, forget the video resolution parameter, don't applies)

I configured the streaming plugin with a RTP settings, and the ffmpeg line is:

ffmpeg -y -fflags nobuffer -hide_banner -nostdin -i 'rtsp://user:pass...@192.168.11.10/?inst=2' -c:v copy -flags global_header -bsf dump_extra -f rtp rtp://XXX.XXX.XXX.XXX:10001?pkt_size=1300

inst=2 -> Second Stream, because i changed the profile of the second, but i think that if you set the parameters to the main stream, it will work also.

I didn't tried with firefox, but what i see (as commented in this forum) is that the web browser must support the codec, so all the additions that manufacturers do to the codec, breaks the compatibility with browser

Regards