Hide

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.


Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Universal configuration monitoring and system of record for IT.
Hide

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

Hide

News

May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!
Hide

Top Tags

Hide

Functions

Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Apply fade effect to a audio

Terminal - Apply fade effect to a audio
sox input.mp3 output.mp3 fade h 5 00:02:58 5
2011-09-03 13:59:03
User: kev
1
Apply fade effect to a audio

fade [type] fade-in-length [stop-time [fade-out-length]]

Apply a fade effect to the beginning, end, or both of the audio.

An optional type can be specified to select the shape of the fade curve: q for quarter of a sine wave, h for

half a sine wave, t for linear (`triangular') slope, l for logarithmic, and p for inverted parabola. The

default is logarithmic.

A fade-in starts from the first sample and ramps the signal level from 0 to full volume over fade-in-length sec?

onds. Specify 0 seconds if no fade-in is wanted.

For fade-outs, the audio will be truncated at stop-time and the signal level will be ramped from full volume

down to 0 starting at fade-out-length seconds before the stop-time. If fade-out-length is not specified, it

defaults to the same value as fade-in-length. No fade-out is performed if stop-time is not specified. If the

file length can be determined from the input file header and length-changing effects are not in effect, then 0

may be specified for stop-time to indicate the usual case of a fade-out that ends at the end of the input audio

stream.

All times can be specified in either periods of time or sample counts. To specify time periods use the format

hh:mm:ss.frac format. To specify using sample counts, specify the number of samples and append the letter `s'

to the sample count (for example `8000s').

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

Your point of view

You must be signed in to comment.