Questions tagged [multiplexing]
39 questions
24
votes
11 answers
Inverse multiplexing to speed up file transfer
I have send a large amount of data from one machine to another. If I send with rsync (or any other method), it will go at a steady 320kb/sec. If I initiate two or three transfers at once, each will go at 320, and if I do four at once, they will max…
24
votes
9 answers
Can nginx serve SSH and HTTP(S) at the same time on the same port?
Context
I have a personal server that I use for the web. I sometimes need to SSH/SFTP to it.
Disclamer: I have very little experience with nginx internals.
Problem
This morning, I figured out that the free wifi in a well-know cafe chain was…
JohnW
- 377
14
votes
2 answers
What are the differences between multiplexing using tmux/screen and opening tabs in a terminal emulator?
I am trying to compare these two methods of running multiple shells/processes by measuring memory and cpu usage via htop.
Can someone explain the differences in how each method functions, or if there are any?
EDIT:
From what I understand now,…
abdelmak
- 143
5
votes
0 answers
Invoking a local command on every successful connect when using ssh multiplexing?
I'd like to automatically run a command every time I successfully connect to a remote host via ssh.
I can do this for the first connection to each host using the PermitLocalCommand yes and LocalCommand ~/bin/ssh-notify-me entries in my…
Shabble
- 276
4
votes
3 answers
ssh X11 forwarding issue
I have put ForwardX11 in my ~/.ssh/config and then I start a X11 application like this:
ssh -f user@host 'someapp; sleep 1'
This works fine.
The application someapp has a button which opens a viewer application via a shell script viewer.sh. When I…
user1863
- 214
4
votes
3 answers
What does "address data multiplexing" and "bus buffering" mean?
In my notes, I keep coming across two terms which are confusing me while looking through my notes on the 8085 processor.
The first is address data multiplexing. What is meant by this exactly? I understand the concept of multiplexing (combining n…
4
votes
1 answer
What does the "mux" option in VLC media player do?
When I use VLC media player to stream a video file with the command line, I have to tell, what kind of "mux" I prefer:
vlc --network-caching=1000 -vvv --sout '#http{mux=ts,dst=:8080}'
What does mux mean? What is done by muxing/multiplexing…
Julian F.
- 533
4
votes
1 answer
Show commands running in background in tmux pane
Quite often I send nvim, ranger or other applications to background with Ctrl+z and then forget in which exactly pane it was open - brute-forcing tens of panes is quite tedious task.
Is there anything similar to ${pane_current_command}, but for…
chuwy
- 141
3
votes
2 answers
How to stretch a shorter audio track to fit longer video with Audacity
I've demuxed an audio commentary track from a DVD release of a movie. My plan is to mux this commentary track back into a Blu-Ray version of the movie. However, the problem is that the Blu-Ray is 4 minutes and 15 seconds longer than the…
Hashim Aziz
- 13,835
2
votes
2 answers
How to use ffmpeg to rip audio from mp4 and add it to another
I created a video using Final Cut Pro X (10.1.4) and added a commentary using the voiceover feature. I was surprised to discover that FCPX does not support outputting a file with multiple audio tracks.
I disabled the commentary track and saved the…
user42225
2
votes
1 answer
How to multiplex two videos with ffmpeg
I'm converting videos using the -s option for multiple resulutions and I want to include a short intro at the begining of the video. but for some reason it skips the second -i so i'm only getting the intro Opener_4.mp4 witout the video…
user2783132
- 1,967
2
votes
2 answers
Multiplexing Internet connections
I'm looking for some way to multiplex my internet connections so that I can use them simultaneously.
I have a wi-fi/lan connection and a USB dongle that let me connect to the internet, Now the wi-fi/lan connection is a little un-reliable and has a…
ffledgling
- 448
2
votes
1 answer
How can I remux FLV movies from YouTube (e.g. into MKV)?
For some obscure reason, I have some video files I downloaded from YouTube as FLV rather than in another format. I would like to re-mux them into, say, MKV (Matroska). When trying to use ffmpeg, I get a Unsupported video codec (7) message. What…
einpoklum
- 10,666
2
votes
1 answer
Multiple video filters in FFmpeg
I want to add a PNG watermark and then scale my video. I may add more filters. This is my FFmpeg command.
sweb@sweb-laptop:/tmp$ ffmpeg -i Wildlife.wmv -sn -acodec libvorbis -vcodec libvpx -b:a 128k -ar 44100 -b:v 384k -r 25 -vf "movie=/tmp/icon.png…
2
votes
1 answer
Streaming A/V: who gets multiplexed and encoded, where and when?
I was perusing the list of VLC's supported video/audio formats and I realized that I actually know very little about streaming media.
When a streaming media feed contains both audio and video, how do these separate signals get merged/integrated into…
pnongrata
- 2,982