使用终端进行VLC屏幕捕获 [英] VLC screen capture using terminal

问题描述

我正在尝试将屏幕捕获为视频，并发现VLC可能是最好的解决方案.我要做的是使用终端捕获特定的应用程序，然后也停止捕获.现在，我可以使用终端通过以下命令进行捕获:

I'm attempting to capture my screen as video and found VLC to probably be the best solution. What I have to do is capture a specific application using terminal and then stop the capture as well. Right now, I can capture using terminal with the following command:

/Applications/VLC.app/Contents/MacOS/VLC -I dummy screen:// --screen-fps=25 --quiet --sout "#transcode{vcodec=h264,vb072}:standard{access=file,mux=mp4,dst="Desktop/vlc-output-terminal.mp4"}"

那太好了，它有效.问题是，如何使用终端退出录音?现在，我必须在终端上执行 Control + C 才能将其退出.我已经在网上看到vlc://quit，但不确定如何使用该命令.

That's great, it works. The question is, how do I quit the recording using terminal? Right now, I'm having to do Control+C on the terminal to quit it. I've seen vlc://quit online, but I'm not sure how to use that command.

还有，有人知道是否可以使用VLC捕获特定的应用程序，还是整个屏幕是唯一的选择?

Also, does anyone know if it's possible to capture a specific application using VLC or is the whole screen the only option?

推荐答案

录制时如何不退出

信号SIGINT的

Ctrl + C 终止进程(在本例中为VLC).

How to NOT quit when recording

Ctrl+C kill process (in this case VLC) with signal SIGINT.

vlc://quit选项在捕获屏幕时将不起作用，因为流是永无止境的源.

---

vlc://quit option will not work when you capture screen because stream is never-ending source.

---

您可以使用TCP socket或UNIX socket连接到VLC.

You can connect to your VLC using a TCP socket or a UNIX socket.

• TCP套接字

• TCP socket

要能够使用TCP套接字(类似于telnet的连接)远程连接到VLC，请使用-rc-host your_host:port .然后，通过使用给定端口(使用telnet或netcat)连接到主机，您将获得命令外壳.

To be able to remote connect to your VLC using a TCP socket (telnet-like connetion), use --rc-host your_host:port. Then, by connecting (using telnet or netcat) to the host on the given port, you will get the command shell.

UNIX套接字

UNIX socket

要使用UNIX套接字(本地套接字，不适用于Windows)，请使用-rc-unix/path/to/socket .然后可以使用此UNIX套接字传递命令.

To use a UNIX socket (local socket, this does not work for Windows), use --rc-unix /path/to/socket. Commands can then be passed using this UNIX socket.

要为VLC启用远程控制界面，您将需要添加选项

To enable remote control interface for VLC you will need to add options

--extraintf rc --rc-quiet

---

• TCP套接字

• TCP socket

回声退出| nc your_host端口

echo quit | nc your_host port

UNIX套接字

回声退出| nc -U/path/to/socket

---

echo quit | nc -U /path/to/socket

---

1. 执行VLC

1. Execute VLC

vlc \
screen:// --one-instance \
-I dummy --dummy-quiet \
--extraintf rc \
--rc-host localhost:8082 \
--rc-quiet \
--screen-follow-mouse \
--screen-mouse-image="mouse_pointer.png" \
--screen-left=0 --screen-top=0 --screen-width=800 --screen-height=600 \
--no-video :screen-fps=15 :screen-caching=300 \
--sout "#transcode{vcodec=h264,vb=800,fps=5,scale=1,acodec=none}:duplicate{dst=std{access=file,mux=mp4,dst='/Videos/screen.mp4'}}"

正常关闭VLC

Gracefully shutdown VLC

echo quit | nc localhost 8082

如果您没有 nc(netcat)，也可以在下面使用Python代码.在您的计算机上.

You can also use Python code below if you do not have nc (netcat) on your computer.

import socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('localhost', 8082))
s.sendall('quit\n')
s.shutdown(socket.SHUT_WR)

---

您无法选择要记录的应用程序，但可以指定子屏幕的坐标，宽度和高度.

You can't select which application to record but you can specify coordinate, width and height of the subscreen.

选项

• --screen-top integer子屏幕的顶部边缘坐标. 默认值:0
• --screen-left integer子屏幕的左边缘坐标. 默认值:0
• --screen-width integer子屏幕的宽度. 默认值:<全屏宽度>
• --screen-height integer子屏幕的高度. 默认值:<全屏高度>

• --screen-top integer The top edge coordinate of the subscreen. Default value: 0
• --screen-left integer The left edge coordinate of the subscreen. Default value: 0
• --screen-width integer The width of the subscreen. Default value: <full screen width>
• --screen-height integer The height of the subscreen. Default value: <full screen height>

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