Problem using VLM

[mbrossard]

Hello
I was previously using the VLC VLM System to produce a mosaic of 4 or 9 pictures from IPTV UDP stream.To do this, I used version 0.8.6i janus.
It worked very well.
The Conf code was :

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new channel1 broadcast enabled setup channel1 input udp://@225.1.1.10:1234 setup channel1 output #duplicate{dst=mosaic-bridge{id=1,height=540,width=960},select=video,dst=bridge-out{id=1},select=audio} new channel2 broadcast enabled setup channel2 input udp://@225.0.0.22:1234 setup channel2 output #duplicate{dst=mosaic-bridge{id=2,height=540,width=960},select=video,dst=bridge-out{id=2},select=audio} new channel3 broadcast enabled setup channel3 input udp://@225.0.0.23:1234 setup channel3 output #duplicate{dst=mosaic-bridge{id=3,height=540,width=960},select=video,dst=bridge-out{id=3},select=audio} new channel4 broadcast enabled setup channel4 input udp://@225.0.0.24:1234 setup channel4 output #duplicate{dst=mosaic-bridge{id=4,height=540,width=960},select=video,dst=bridge-out{id=4},select=audio} new background2 broadcast enabled setup background2 input fake: setup background2 output #transcode{sfilter=mosaic,vcodec=mp2v,vb=8000,scale=1,desinterlace=1}:bridge-in{delay=400,id-offset=100}:standard{access=udp,mux=ts,url=225.1.11.251:1234} control channel1 play control channel2 play control channel3 play control channel4 play control background2 play

My old batch :

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taskkill /f /im vlc.exe "C:\VLC86i\vlc.exe" --color -I telnet --telnet-port=4215 --vlm-conf MosaiqueM6-3.conf --ttl 20 --fake-file MosaiqueM6-3.jpg --no-audio --fake-aspect-ratio "16:9" --mosaic-width 1920 --mosaic-height 1080 --udp-caching 800 --mosaic-xoffset 0 --mosaic-yoffset 0 --mosaic-keep-picture --mosaic-rows 2 --mosaic-cols 2 --mosaic-position 1 --mosaic-order 1,2,3,4

For some reason that I do not understand, the nature of flows must have changed, and now, the Script crashes VLC(even with simple VLC Play). The logs show some issues with PAFF interlacing and MBAFF, not supported by this version.
So I tried to redo the mosaic with the new version of VLC (2.2.2 WeatherWax)
No succes.
Here is my new Code:

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del all new channel1 broadcast enabled setup channel1 input udp://@225.0.0.21:1234 setup channel1 output #duplicate{dst=mosaic-bridge{id=1,width=960,height=540} new channel2 broadcast enabled setup channel2 input udp://@225.0.0.22:1234 setup channel2 output #duplicate{dst=mosaic-bridge{id=2,width=960,height=540} new channel3 broadcast enabled setup channel3 input udp://@225.0.0.23:1234 setup channel3 output #duplicate{dst=mosaic-bridge{id=3,width=960,height=540} new channel4 broadcast enabled setup channel4 input udp://@225.0.0.24:1234 setup channel4 output #duplicate{dst=mosaic-bridge{id=4,width=960,height=540} new mosaic broadcast enabled setup mosaic input "C:\VLM\BKGD_HD.jpg" setup mosaic option image-duration=-1 setup mosaic output #transcode{sfilter=mosaic,vcodec=mp4v,vb=500,scale=1}:standard{access=udp,mux=ts,url=225.1.11.251:bridge-in{id-offset=100}:1234,sap,name="mosaic" control mosaic play control channel1 play control channel2 play control channel3 play control channel4 play

My new Batch :

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"C:\Program Files\VideoLAN\VLC\\vlc.exe" --color -I telnet --vlm-conf C:\VLM\CONFIG.vlm.conf --mosaic-width=1920 --mosaic-height=1080 --mosaic-keep-picture --mosaic-rows=2 --mosaic-cols=2 --mosaic-position=1 --mosaic-order=1,2,3,4, --ttl 12 --udp-caching 800

But this does not work at all.

The streams are read fine with VLC in normal mode (in display local or re-stream UDP) :

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"C:\Program Files\VideoLAN\VLC\\vlc.exe" udp://@225.0.0.21:1234:1234 --sout #std{access=udp,mux=ts,dst=225.1.11.251:1234}

However, even if I make a VLM with 1 single feed configuration full-screen without Background, as soon as I use VLM, this does not work.
My «Simple» Conf VLM :

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del all new channel1 broadcast enabled setup channel1 input udp://@225.0.0.21:1234 setup channel1 output #transcode{sfilter=mosaic,vcodec=mp4v,vb=500,scale=1}:display control channel1 play

The batch :

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"C:\Program Files\VideoLAN\VLC\\vlc.exe" --color -I telnet --vlm-conf C:\VLM\CONFIG.vlm.conf --mosaic-width=1920 --mosaic-height=1080 --mosaic-keep-picture --mosaic-rows=1 --mosaic-cols=1 --mosaic-position=1 --mosaic-order=1, --ttl 12 --udp-caching 800

In this case, the image is displayed much degraded and I get full of RC buffer underflow error
Again, this stream works very well in playing VLC "Direct" and that’s why I really don’t understand.

I tried 1000 different configurations and I browsed all the topics I found on the subject on the web without success.
Someone have an idea?

Thanks in advance for your help
Have a Nice day
Mathieu

[Jean-Baptiste Kempf]

Use -vvv to give us the logs, so we can diagnose the issue.