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Old 05-27-2015, 07:15 PM   #1
eantoranz
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how to easily create a stream that could be seen on a terminal?


As a network experiment, I'd like to be able to stream some content to people that connected to a certain port of my computer, as if it were aa or caca output.

I know it's possible to use mplayer to be able to see video on the terminal of the local computer and so I thought that it shouldn't be too difficult to try to stream it into the network.

How can that be easily achieved?

Thanks in advance.
 
Old 05-27-2015, 09:19 PM   #2
Sefyir
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Try using netcat (nc)?

On server side (sending out the stream)
Code:
nc -l portnumber
on client side (recieving stream)
Code:
nc ip-addr portnumber
with mplayer

Code:
nc ip-addr portnumber | mplayer -
This will only work on a 1:1 basis rather then 1:multi.
You'll need something like icecast for that which is more "suited" but increases in complexity.

Last edited by Sefyir; 05-27-2015 at 09:20 PM.
 
Old 05-27-2015, 09:32 PM   #3
eantoranz
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I thought of netcat but I would have to feed it the multimedia stream.... and my question was pointed more or less in that direction. Say, something along the lines of:

Code:
multimedia-encoder --whatever-options-to-produce-the-stream-content sourcefile.avi | nc -l 4567
And then someone be able to see the content by doing this:

Code:
telnet ip-address 4567
But then it would only work for the first client that connects, right? How about producing content for anyone that connects?
 
Old 05-27-2015, 10:28 PM   #4
Sefyir
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Quote:
But then it would only work for the first client that connects, right? How about producing content for anyone that connects?
Then it'd have to create a new connection for that user.

Use something designed for broadcasting media to multiple users

http://mpd.wikia.com/wiki/Icecast2


This example would not work
Code:
multimedia-encoder --whatever-options-to-produce-the-stream-content sourcefile.avi | nc -l 4567
You can't both save and pipe the file. Since it is being saved as sourcefile.avi, nothing is sent to stdout and nc has nothing to send to a user.
IF you want to both save a file and send it out, tee does this.
Code:
multimedia-encoder --whatever-options-to-produce-the-stream-content - | tee sourcefile.avi | nc -l 4567
This would cause the output to be saved as sourcefile.avi and piped to nc.
This can have unexpected consequences if the multimedia-encoder depends on the file extension to determine how to encode it (like ffmpeg/avconv) which can be overridden by manually defining the format.
 
Old 05-27-2015, 10:31 PM   #5
eantoranz
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I understand what you mean.... but actually, in my example, sourcefile.avi is what you would like to stream out.
 
Old 05-27-2015, 10:48 PM   #6
Sefyir
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I suggest experimenting. A common method of outputting a file into a program is with cat.
Code:
cat file | program
You can try it with just cat file too and see what happens.
(Ctrl + c will cancel any output the cat command does)

Last edited by Sefyir; 05-27-2015 at 10:49 PM.
 
  


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