Difference between revisions of "VLC HowTo/Make a mosaic"
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| − | {{howto| set up a mosaic of a few videos or stream like a TV portal}} | + | {{See also|Documentation:Modules/mosaic}} |
| + | {{howto|set up a mosaic of a few videos or stream like a TV portal}} | ||
==VLC mosaic howto== | ==VLC mosaic howto== | ||
| − | This is a small example about how to use {{VLC}} to create a mosaic. What we basically want is a video mosaic mixing 3 video channels (channels 1, 2 and 3) on a background image (background.png) and streaming the resulting video on the network. Note that we will also be streaming the 3 sound tracks from channels 1, 2 and 3 in the same | + | This is a small example about how to use {{VLC}} to create a mosaic. What we basically want is a video mosaic mixing 3 video channels (channels 1, 2 and 3) on a background image (background.png) and streaming the resulting video on the network. Note that we will also be streaming the 3 sound tracks from channels 1, 2 and 3 in the same [[MPEG-TS]] stream. |
| − | Starting with VLC 0.8.5-test2, the | + | Starting with VLC 0.8.5-test2, the [[HTTP interface]] features a "Mosaic wizard". You might want to use it if you have no knowledge of VLC [[command line]] usage. |
| − | + | https://web.archive.org/web/20070303011022/https://people.via.ecp.fr/~dionoea/videolan/mosaic1.png | |
Other neat examples : | Other neat examples : | ||
| + | * [https://web.archive.org/web/20081011005351/https://people.via.ecp.fr/~dionoea/videolan/mosaic2.jpg 12 video mosaic] | ||
| + | * [https://web.archive.org/web/20070404201658/https://people.via.ecp.fr/~dionoea/videolan/mos1.png 20 video mosaic] | ||
| + | * [https://web.archive.org/web/20081011005318/https://people.via.ecp.fr/~dionoea/videolan/mos2.png 20 video mosaic] | ||
| − | [ | + | ===Step 0=== |
| + | |||
| + | Read the [https://web.archive.org/web/20091228140745/https://www.videolan.org/doc/streaming-howto/en/streaming-howto-en.html VLC streaming howto]<sup class="plainlinks">[https://web.archive.org/web/20100106011007/https://www.videolan.org/doc/streaming-howto/fr/streaming-howto-fr.html [fr]]</sup> ([https://web.archive.org/web/20091227093342/https://www.videolan.org/doc/streaming-howto/en/ch03.html chapters 3]<sup class="plainlinks">[https://web.archive.org/web/20100117041601/https://www.videolan.org/doc/streaming-howto/fr/ch03.html [fr]]</sup> and [https://web.archive.org/web/20091230100742/https://www.videolan.org/doc/streaming-howto/en/ch05.html 5]<sup class="plainlinks">[https://web.archive.org/web/20100112081440/https://www.videolan.org/doc/streaming-howto/fr/ch05.html [fr]]</sup> concerning command line and VLM usage in VLC) : [https://web.archive.org/web/20091227093342/https://www.videolan.org/doc/ www.videolan.org/doc] | ||
| − | + | ===Step 1=== | |
| − | [ | + | [https://www.videolan.org/vlc/#download Get VLC] 2 or newer and [[Documentation:Installing VLC|install it]] on your computer. |
| − | ===Step | + | ===Step 2=== |
| − | + | You now have to get a background for the mosaic. | |
| − | + | An image is the easiest way to have a background that can be played as long as necessary. The image should be the same size as the video you want to create. Many image formats are supported ([[JPEG]], [[PNG]] …). | |
| − | + | It is also possible to use a video as a background for the mosaic, and [[wiktionary:superimpose|superimpose]] other videos. | |
| − | + | The [[frame rate]] of the background video or image will be the frame rate of the mosaic video. This is important since the default frame rate for image files is 10fps. | |
| − | + | For videolan 1.x and earlier, use the {{docmod|fake}}: access method. The frames per second cannot be changed. | |
| − | You | + | You should test it with VLC to see if it displays locally : |
| − | + | ./vlc file:///full/path/to/background.png --image-duration=-1 --image-fps=10 | |
| − | ./vlc | ||
| − | |||
===Step 3=== | ===Step 3=== | ||
| Line 38: | Line 42: | ||
You now need to configure VLC to get the 3 source streams and blend them on the background image. | You now need to configure VLC to get the 3 source streams and blend them on the background image. | ||
| − | The vlm configuration file looks like : | + | The [[VLM#vlm.conf|VLM configuration file]] looks like : |
<pre> | <pre> | ||
| Line 54: | Line 58: | ||
new background broadcast enabled | new background broadcast enabled | ||
| − | setup background input | + | setup background input /full/path/to/background.png |
setup background output #transcode{sfilter=mosaic,vcodec=mp2v,vb=10000,scale=1}:bridge-in{delay=400,id-offset=100}:standard{access=udp,mux=ts,url=239.255.12.42,sap,name="mosaic"} | setup background output #transcode{sfilter=mosaic,vcodec=mp2v,vb=10000,scale=1}:bridge-in{delay=400,id-offset=100}:standard{access=udp,mux=ts,url=239.255.12.42,sap,name="mosaic"} | ||
| Line 63: | Line 67: | ||
</pre> | </pre> | ||
| − | + | Since VLC 2.0, the mosaic options must be passed in the command line, and not in the VLM file. | |
| + | |||
| + | Alternatively, one can setup a mosaic directly from files using a VLM configuration file as the following : | ||
| + | |||
| + | <pre> | ||
| + | new channel1 broadcast enabled | ||
| + | setup channel1 input file:///path/to/movie.mp4 | ||
| + | setup channel1 output #duplicate{dst=mosaic-bridge{id=1,height=366}} | ||
| + | |||
| + | new channel2 broadcast enabled | ||
| + | setup channel2 input file:///path/to/movie.mp4 | ||
| + | setup channel2 output #duplicate{dst=mosaic-bridge{id=2,height=366}} | ||
| + | |||
| + | new channel3 broadcast enabled | ||
| + | setup channel3 input file:///path/to/movie.mp4 | ||
| + | setup channel3 output #duplicate{dst=mosaic-bridge{id=3,height=366}} | ||
| − | === | + | new channel4 broadcast enabled |
| + | setup channel4 input file:///path/to/movie.mp4 | ||
| + | setup channel4 output #duplicate{dst=mosaic-bridge{id=4,height=366}} | ||
| + | |||
| + | new mosaic broadcast enabled | ||
| + | setup mosaic input file:///path/to/background1600.png | ||
| + | setup mosaic output #transcode{sfilter=mosaic,vcodec=mp4v,VB=20000,acodec=none,fps=15,scale=1}:display | ||
| − | + | control mosaic play | |
| + | control channel1 play | ||
| + | control channel2 play | ||
| + | control channel3 play | ||
| + | control channel4 play | ||
| + | </pre> | ||
| + | To [[Documentation:Modules/standard|write the resulting stream to a file]], the mosaic output line may also be replaced by : | ||
<pre> | <pre> | ||
| − | + | setup mosaic output #transcode{sfilter=mosaic,vcodec=mp4v,VB=20000,acodec=none,fps=15,scale=1}:standard{access=file,mux=ogg,dst="output_file.ogg"} | |
| − | |||
| − | |||
| − | |||
| − | |||
</pre> | </pre> | ||
| + | |||
| + | Note that the source streams are network streams, which is likely to be the case if you're considering doing a mosaic. | ||
| + | |||
| + | ===Step 4=== | ||
| + | |||
| + | And now, the right command to launch VLC : | ||
| + | ./vlc --color -I telnet --vlm-conf --mosaic-width=360 --mosaic-height=288 --mosaic-keep-picture --mosaic-rows=2 --mosaic-cols=2 --mosaic-position=1 --mosaic-order=1,2,3,4 ../mosaic.vlm.conf --ttl 12 --udp-caching 800 | ||
== Other examples == | == Other examples == | ||
=== Dual webcam with alphamask === | === Dual webcam with alphamask === | ||
| + | {{See also|Documentation:Modules/alphamask}} | ||
| + | https://web.archive.org/web/20110421103501/https://people.videolan.org/~dionoea/mosaic/dual-webcam.png | ||
| − | + | <pre> | |
| − | + | new isight broadcast | |
| − | <pre>new isight broadcast | ||
setup isight input v4l2:///dev/video0:width=320:height=240:audio-method=0 | setup isight input v4l2:///dev/video0:width=320:height=240:audio-method=0 | ||
setup isight option v4l2-brightness=90 | setup isight option v4l2-brightness=90 | ||
| Line 100: | Line 135: | ||
control isight play | control isight play | ||
#control audio play | #control audio play | ||
| − | control logitech play</pre> | + | control logitech play |
| + | </pre> | ||
| − | You can then launch it with: | + | You can then launch it with : |
vlc --vlm-conf ../dual-webcam.conf --no-media-library --plugin-path modules -v --no-video-title --mosaic-keep-picture | vlc --vlm-conf ../dual-webcam.conf --no-media-library --plugin-path modules -v --no-video-title --mosaic-keep-picture | ||
| − | The mask.png file is used to set transparency values on the isight camera (uses the png alpha plane). An example file to use | + | The mask.png file is used to set transparency values on the isight camera (uses the png alpha plane). An example file to use [https://web.archive.org/web/20110824043406/https://people.videolan.org/~dionoea/mosaic/mosaic_transparency_mask.txt is available] at people.videolan.org/~dionoea/mosaic. |
| − | ==See | + | ==See also== |
| − | * [http://people.via.ecp.fr/~dionoea/videolan/mosaic-diagram.png | + | * [https://web.archive.org/web/20070303010905if_/http://people.via.ecp.fr:80/~dionoea/videolan/mosaic-diagram.png Diagram that might help] |
| − | * [ | + | * [https://web.archive.org/web/20121015070412/https://people.videolan.org/~dionoea/mosaic/ VLC mosaic-related resources] |
* [[MosaicExampleSetup | Example set-up of conference web-streaming with two grabber cards]] | * [[MosaicExampleSetup | Example set-up of conference web-streaming with two grabber cards]] | ||
| − | + | {{Mosaic framework}} | |
| − | |||
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Latest revision as of 07:50, 31 May 2019
See also: Documentation:Modules/mosaic
| This page describes how to set up a mosaic of a few videos or stream like a TV portal. | Other "how to" pages |
Contents
VLC mosaic howto
This is a small example about how to use VLC media player to create a mosaic. What we basically want is a video mosaic mixing 3 video channels (channels 1, 2 and 3) on a background image (background.png) and streaming the resulting video on the network. Note that we will also be streaming the 3 sound tracks from channels 1, 2 and 3 in the same MPEG-TS stream.
Starting with VLC 0.8.5-test2, the HTTP interface features a "Mosaic wizard". You might want to use it if you have no knowledge of VLC command line usage.
Other neat examples :
Step 0
Read the VLC streaming howto[fr] (chapters 3[fr] and 5[fr] concerning command line and VLM usage in VLC) : www.videolan.org/doc
Step 1
Get VLC 2 or newer and install it on your computer.
Step 2
You now have to get a background for the mosaic.
An image is the easiest way to have a background that can be played as long as necessary. The image should be the same size as the video you want to create. Many image formats are supported (JPEG, PNG …).
It is also possible to use a video as a background for the mosaic, and superimpose other videos.
The frame rate of the background video or image will be the frame rate of the mosaic video. This is important since the default frame rate for image files is 10fps.
For videolan 1.x and earlier, use the fake: access method. The frames per second cannot be changed.
You should test it with VLC to see if it displays locally :
./vlc file:///full/path/to/background.png --image-duration=-1 --image-fps=10
Step 3
You now need to configure VLC to get the 3 source streams and blend them on the background image.
The VLM configuration file looks like :
new channel1 broadcast enabled
setup channel1 input udp://@239.255.2.60:1234
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 udp://@239.255.10.200:1234
setup channel2 output #duplicate{dst=mosaic-bridge{id=2,height=144,width=180},select=video,dst=bridge-out{id=2},select=audio}
new channel3 broadcast enabled
setup channel3 input udp://@239.255.6.9:1234
setup channel3 output #duplicate{dst=mosaic-bridge{id=3,height=144,width=180},select=video,dst=bridge-out{id=3},select=audio}
new background broadcast enabled
setup background input /full/path/to/background.png
setup background output #transcode{sfilter=mosaic,vcodec=mp2v,vb=10000,scale=1}:bridge-in{delay=400,id-offset=100}:standard{access=udp,mux=ts,url=239.255.12.42,sap,name="mosaic"}
control background play
control channel1 play
control channel2 play
control channel3 play
Since VLC 2.0, the mosaic options must be passed in the command line, and not in the VLM file.
Alternatively, one can setup a mosaic directly from files using a VLM configuration file as the following :
new channel1 broadcast enabled
setup channel1 input file:///path/to/movie.mp4
setup channel1 output #duplicate{dst=mosaic-bridge{id=1,height=366}}
new channel2 broadcast enabled
setup channel2 input file:///path/to/movie.mp4
setup channel2 output #duplicate{dst=mosaic-bridge{id=2,height=366}}
new channel3 broadcast enabled
setup channel3 input file:///path/to/movie.mp4
setup channel3 output #duplicate{dst=mosaic-bridge{id=3,height=366}}
new channel4 broadcast enabled
setup channel4 input file:///path/to/movie.mp4
setup channel4 output #duplicate{dst=mosaic-bridge{id=4,height=366}}
new mosaic broadcast enabled
setup mosaic input file:///path/to/background1600.png
setup mosaic output #transcode{sfilter=mosaic,vcodec=mp4v,VB=20000,acodec=none,fps=15,scale=1}:display
control mosaic play
control channel1 play
control channel2 play
control channel3 play
control channel4 play
To write the resulting stream to a file, the mosaic output line may also be replaced by :
setup mosaic output #transcode{sfilter=mosaic,vcodec=mp4v,VB=20000,acodec=none,fps=15,scale=1}:standard{access=file,mux=ogg,dst="output_file.ogg"}
Note that the source streams are network streams, which is likely to be the case if you're considering doing a mosaic.
Step 4
And now, the right command to launch VLC :
./vlc --color -I telnet --vlm-conf --mosaic-width=360 --mosaic-height=288 --mosaic-keep-picture --mosaic-rows=2 --mosaic-cols=2 --mosaic-position=1 --mosaic-order=1,2,3,4 ../mosaic.vlm.conf --ttl 12 --udp-caching 800
Other examples
Dual webcam with alphamask
See also: Documentation:Modules/alphamask
new isight broadcast
setup isight input v4l2:///dev/video0:width=320:height=240:audio-method=0
setup isight option v4l2-brightness=90
setup isight output #mosaic-bridge{chroma=YUVA,vfilter=alphamask{mask=../mask.png},width=320,height=240}
setup isight enabled
new logitech broadcast
setup logitech input v4l2:///dev/video1:width=640:height=480:audio-method=0
setup logitech output #transcode{vcodec=mp4v,vb=1024,sfilter="mosaic:marq{marquee='VLC dual webcam setup',position=8}"}:bridge-in:display
setup logitech enabled
new audio broadcast enabled
setup audio input v4l:///dev/dsp1
setup audio output #transcode{acodec=mp4a,ab=128}:bridge-out
control isight play
#control audio play
control logitech play
You can then launch it with :
vlc --vlm-conf ../dual-webcam.conf --no-media-library --plugin-path modules -v --no-video-title --mosaic-keep-picture
The mask.png file is used to set transparency values on the isight camera (uses the png alpha plane). An example file to use is available at people.videolan.org/~dionoea/mosaic.
See also
- Diagram that might help
- VLC mosaic-related resources
- Example set-up of conference web-streaming with two grabber cards
| Mosaic framework (How-To) |
| Modules: mosaic (mosaic-bridge • bridge-in • bridge-out) • alphamask • bluescreen |
