Could vlc make a video mosaic?

[alvsant]

Could vlc make a video mosaic streaming or playing?

[xtophe]

Yes, but:
-It's a bit tricky,
-Required the latest development version
-It's very cpu intensive

You should search in the vlc-devel mailing list archive for mosaic.

hth,

[dionoea]

a sample vlm configuration file to make a mosaic:

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new tf1 broadcast enabled setup tf1 input udp://@239.255.2.60:1234 setup tf1 output #duplicate{dst=mosaic-bridge{id=1,height=144,width=180},select=video,dst=bridge-out{id=1},select=audio} new fr2 broadcast enabled setup fr2 input udp://@239.255.10.200:1234 setup fr2 output #duplicate{dst=mosaic-bridge{id=2,height=144,width=180},select=video,dst=bridge-out{id=2},select=audio} new TVEi broadcast enabled setup TVEi input udp://@239.255.6.9:1234 setup TVEi output #duplicate{dst=mosaic-bridge{id=3,height=144,width=180},select=video,dst=bridge-out{id=3},select=audio} new bg broadcast enabled #setup bg loop input /home/via/videolan/videolan_mp1v.ts setup bg input fake: setup bg output #switcher{files=/home/via/videolan/image_orange.uyvy,sizes=360x288,command=1}:transcode{sfilter=mosaic,vcodec=mp2v,vb=10000,scale=1}:bridge-in{delay=400,id-offset=100}:standard{access=udp,mux=ts,url=239.255.99.99,sap,group=Mosaic,name="[mosaic] TF1 - FR2 - TVEi"} control bg play control tf1 play control fr2 play control TVEi play

and the VLC command line to launch it

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./vlc $1 --color -I telnet --vlm-conf ../mosaic.vlm.conf --ttl 12 \ --mosaic-width 360 --mosaic-height 288 --udp-caching 800 \ --mosaic-keep-picture \ --mosaic-rows 2 --mosaic-cols 2 --mosaic-position 1 --mosaic-order 1,2,3

what it basically does :
take image_orange.uyvy as the background image
take 3 network streams as input
mix the video
add 1 audio channel per original network stream (or more if the original stream had more than one channel)
stream the resulting image/audio to a multicast ip address with an sap announce

[alvsant]

Thanks, I´m going to test it now.

[dionoea]

to generate the background image here is what i use: (you need it to be uyvy ...)

convert the original image (bmp, png, jpeg ...):

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convert -size 720x576 image.ext -resize 720x576 image.uyvy

test the image:

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display -size 720x576 image.uyvy

test using the image in VLC:

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./vlc --sout-switcher-files=videolan.uyvy --sout-switcher-sizes=720x576 \ --sout-switcher-command=1 --ttl 12 --sout "#switcher:display" fake:

(convert and display comme with the "imagemagick" package in linux debian)

[alvsant]

This is what i´m looking for and runs well, thanks.

[bXn]

Is the use of an image as background mandatory ?

And another question: I read here http://wiki.videolan.org/index.php/Mosaic#Appendix that ffmpeg was
necessary, can someone confirm this ?

(I am trying to make a mosaic on Windows )

[dionoea]

you can use another video stream as a background image.

ffmpeg isn't allways necessary, just highly recomended since it encodes/decodes most of the video codec you will use.

[bXn]

Ok thanks for the info.
It works ;o)

here's my working config :

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vlc --color -I telnet --vlm-conf mosaic.cfg --ttl 12 --udp-caching 800 --mosaic-width 360 --mosaic-height 288 --mosaic-keep-picture --mosaic-rows 2 --mosaic-cols 2 --mosaic-position 1 --mosaic-order 1,2 --------------------------- Fichier mosaic.cfg new channel1 broadcast enabled setup channel1 input "x.mpg" setup channel1 output #duplicate{dst=mosaic-bridge{id=1,height=144,width=180},select=video,dst=bridge-out{id=1},select=audio} new channel2 broadcast enabled setup channel2 input "y.mpg" setup channel2 output #duplicate{dst=mosaic-bridge{id=2,height=144,width=180},select=video,dst=bridge-out{id=2},select=audio} new background broadcast enabled setup background input "back.mpg" setup background output #transcode{sfilter=mosaic,vcodec=mp4v,acodec=mpga,vb=800,ab=128,deinterlace}:duplicate{dst=display,dst=standard{mux=ts,access=udp,url=192.168.1.53,sap,name="toto"}} control background play control channel1 play control channel2 play

[Guest]

Don't we have to connect to the vlm via telnet?

[Feivel]

Well, I got the last example running, but now I tried to set an image as background. What could be wrong with the following code:

new channel1 broadcast enabled
setup channel1 input "scrubs.avi"
setup channel1 output #duplicate{dst=mosaic-bridge{id=1,height=150,width=250},select=video,dst=bridge-out{id=1},select=audio}

new channel2 broadcast enabled
setup channel2 input "psilodump.mpeg"
setup channel2 output #duplicate{dst=mosaic-bridge{id=2,height=150,width=250},select=video,dst=bridge-out{id=1},select=audio}


new background broadcast enabled
setup background input fake:
setup background output #switcher{files=C:\Program Files\VideoLAN\vlc-test\new.uyvy,sizes=500x300,command=1}:transcode{sfilter=mosaic,vcodec=mp2v,vb=1000,scale=1}:bridge-in{delay=400,id-offset=100}:duplicate{dst=display}


control background play
control channel1 play
control channel2 play


I'm startin the vlc as you recommended, and I'm not getting any error but no display either.

[dionoea]

are you using vlc 0.8.2 ? the --vlm-conf option doesn't exist in 0.8.1

[Feivel]

Yes I'm using the newest version. And I succeeded in arranging 3 videos, but putting the .uyvy-file as the background-image did'nt show anything at all.

Btw., I don't really know, what the switcher-module and the bridge-in is. I'd like to understand everything, but it's kind of complicated and the documentation lacks some good examples.

Anyway, thanks for any kind of suggestions.

[dionoea]

the switcher module is in fact being deprecated (even though its all new). In latest versions, you can do :

vlc fake: --fake-file image.png

That is quite simpler then the switcher solution. (And you just need a png or jpeg file ... )

the switcher module basically takes a list of image and makes a video out of them.

the bridge module takes several elementary streams and groups them.

I've added a small diagram to the wiki page to explain how the differents bricks fit together.

[Feivel]

Thanks man! I will post again in case of success.

[Feivel]

This fake: command is not working.

new channel1 broadcast enabled
setup channel1 input "one.avi"
setup channel1 output #duplicate{dst=mosaic-bridge{id=1,height=150,width=250},select=video,dst=bridge-out{id=1},select=audio}

new channel2 broadcast enabled
setup channel2 input "two.mpeg"
setup channel2 output #duplicate{dst=mosaic-bridge{id=2,height=150,width=250},select=video,dst=bridge-out{id=2},select=audio}



new background broadcast enabled
setup background input fake: --fake-file="C:\VLC\bg.jpg"
setup background output #transcode{sfilter=mosaic,vcodec=WMV2,vb=1000,scale=1}:bridge-in{delay=400,id-offset=100}:duplicate{dst=display}

This is not showing anything, but loading massive stuff into memory.
I'm really frustrated right now, because I can't find my mistake.
And I still think, that some modules are not documented at all.
This one gives just too little information:
http://wiki.videolan.org/index.php/VLC_ ... -line_help

[dionoea]

the --fake-file option needs to be passed to vlc on the command line, not in vlm

[Spider]

the switcher module is in fact being deprecated (even though its all new). In latest versions, you can do :

vlc fake: --fake-file image.png

That is quite simpler then the switcher solution. (And you just need a png or jpeg file ... )

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new background broadcast enabled setup background input fake: --fake-file image.jpg setup background output #transcode{sfilter=mosaic,vcodec=mp4v,vb=150}:bridge-in{delay=400,id-offset=100}:display

crached down with no message, just:

[00000078] main module debug: using packetizer module "rawvideo"
/X/bin/mosaic-vlc: line 8: 2623 Killed vlc -vvv --vlm-conf /X/bin/mosaic.vlm.conf --no-audio --no-sout-audio --color -I telnet --vout X11 --v4l-chroma "I420" --mosaic-width 800 --mosaic-height 600 --mosaic-keep-picture --mosaic-rows 2 --mosaic-cols 2 --mosaic-position 1 --mosaic-order 1,2,3

[dionoea]

You should try this instead :

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new background broadcast enabled setup background input fake: setup background output #transcode{sfilter=mosaic,vcodec=mp4v,vb=150}:bridge-in{delay=400,id-offset=100}:display

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vlc -vvv --vlm-conf /X/bin/mosaic.vlm.conf --no-audio --no-sout-audio --color -I telnet --vout X11 --v4l-chroma "I420" --mosaic-width 800 --mosaic-height 600 --mosaic-keep-picture --mosaic-rows 2 --mosaic-cols 2 --mosaic-position 1 --mosaic-order 1,2,3 --fake-file image.jpg

[Spider]

Can I view picture localy with out transcode?

[dionoea]

sure :

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vlc fake: --fake-file image.png

[Spider]

No! Not fake.
How to view mosaic localy with out transcode?

[dionoea]

oh ... you need the transcode to do the mosaic. What you don't need to view it localy is the standard (or std). Just replace it with :display

[Spider]

wou wou wou
1. I want to view mosaic localy on my display
2. Whow to view it with out transcode? I try to remove vcodec, but vlc process freezing with this way

[dionoea]

you can't do a mosaic without transcode. (but you might want to try to transcode to raw data ... but i don't know how that works. never tried it)