每週我們都會深入我們的讀者郵箱，分享你發郵件的技巧和竅門。本週我們將重點介紹如何使用VLC從任何影片檔案中提取音訊，如何在新聞網站paywalls中偷偷摸摸，以及如何立即延遲Windows Live Mesh的載入。

用vlc從任何影片檔案中提取音訊

本週早些時候，我們與您分享了一個使用VLC調整Android**影片大小的指南。Reedip寫了一本使用VLC從任何影片檔案中提取音訊並將其轉換成MP3格式的指南。他寫道：

VLC is not just a Media Player, it is a whole software in itself.This is just an experiment which I did to try and get an MP3 file from a video I downloaded from YouTube.

VLC has a very easy way to convert the FLV (or any other video file for that sake) to MP3

All you need to do is:

1. Open VLC.
2. Go to Media –> Convert/Save.
3. When you click Convert/Save, it opens a dialog box where in you can select the file which you need to convert(i.e. the video/FLV file which you wish to convert to MP3).
4. After selecting the file click on Convert/Save button located in the lower right hand side of the dialog box.
5. After this,there would be a dialog box for Stream Output. Check the option ‘File’, and go to ‘Browse’ to locally save the file with the filename of your choosing. Whenever you enter the new file name and click Save, a “.ps” is appended at the end of the file name. Substitute the “.ps” extension with a “.mp3” extension.
6. In the Settings section of the Convert dialog box there is Profile drop down menu. Within the Profile section pull the menu down and select MP3 (for MP3encoding).
7. Click SAVE and let the data Stream. Once finished, open the MP3 file and enjoy.

你說得對，VLC是名副其實的瑞士**媒體工具。謝謝你來信。

在谷歌的幫助下偷偷摸摸地繞過付費牆

查爾斯寫了一篇文章，用他的簡單技巧來獲取隱藏在付費牆後面的文章：

I’m an admitted news junkie.  I use the Google Alert feature in G-mail to hone in on the subjects I’m interested in.  Most sites offer free content and some request a sign in… usually free.

But, there is a few sites that want you to pay for the privilege of reading their articles.  Two I can remember off hand is the “Wall Street Journal” and “Financial Times”.  Why they insist on paying customers while everyone else does not… I have no idea.  Generally the first paragraph is seen and that’s all.  A tease.

There is a work around.  At the bottom of each article Google has a link saying, “See all stories on this topic”.  By clicking that link you get all the related articles available.  You also get a new link to the site that was previously partially blocked.  This link however is the full article with no requirements!

非常聰明；對於那些試圖在免費即時資訊的媒介中競爭的公司來說，付費牆是一種非常奇怪的策略。找到繞過他們的簡單方法真不錯。

延遲啟動windows live mesh

讀者Neutr***tar21在文章中寫道，他提出了推遲啟動Windows Live Mesh的建議：

I have an easy fix to prevent Windows Live Mesh (WLM) from starting at logon (Windows 7) but still being able to sign-in automatically when started manually.  I needed this fix as I wanted to sync encrypted volumes that required a password after logon.  WLM would fail at login as it couldn’t find the volume specified to sync. 

WLM cannot be disabled to start at login if the option “sign-in automatically” is checked.  I found that with this option checked WLM would write the startup run registry key (as below) whenever it was executed. I found steps 2-5 here, to give credit where it’s due. Key written by WLM whenever it is executed (with option “sign-in automatically” checked):

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]

“WLSync”=”\”C:\\Program Files (x86)\\Windows Live\\Mesh\\WLSync.exe\” /background”

Anyhow, fix is as follows.

1. To delete  the registry key, create a batch file that executes the command:

Reg Delete “HKCU\Software\Microsoft\Windows\CurrentVersion\Run” /v WLSync /f

2. To run this script at Windows 7 Logoff:

Type “Gpedit.msc” in the Start Button Run box and press “Enter. This opens the Group Policy Editor.

3. Navigate to “User Configuration\Windows Settings\Scripts (Logon/Logoff)” on the left pane. Double-click “Logoff” on the right-pane to bring up the properties.

4. Click “Add.” This loads an Add a Script dialog. Click “Browse” and select the script you made. This places it in the “Script Name” field.

5.Click “OK” at the bottom of the Add a Script dialog to confirm. This takes you back to the properties window. Click “Apply” at the bottom and close your policy editor. The script will run when the user logs off.

如果您處於類似的情況下，這是一個偉大的修復延遲，但自動登入問題與WindowsLiveMesh。謝謝你做了這項工作並且弄明白了中子星21！