Commands tagged ffmpeg (83)

  • Get video information with ffmpeg

    Fix for PHP Shell Exec: ffmpeg -i input.mp4 -f null /dev/null 2>&1 shell_exec("ffmpeg -i input.mp4 -f null /dev/null 2>&1"); Show Sample Output


    0
    ffmpeg -i input.mp4 -f null /dev/null
    Dipo · 2018-11-06 13:44:46 442
  • Generate a GIF image from video file

    The 30 means start extracting frames from 30 seconds into the video. The 3 means extract the next 3 seconds from that point. The fps can be adjusted based on your preferences. The 320 is the width of the gif, the height will be calculated automatically. input.mp4 is the video file, which can be any video file ffmpeg supports. The output.gif is the gif created.


    0
    ffmpeg -ss 30 -t 3 -i input.mp4 -vf "fps=10,scale=320:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 output.gif
    keyboardsage · 2024-03-19 00:34:23 48
  • Convert ogg to mp3

    Converts all ogg files to mp3 files in the current directory.


    -1
    for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"; done
    Superhuman · 2009-09-04 20:23:09 7
  • Get video information with ffmpeg

    mp4box is great when working with mp4s


    -1
    mp4box -info video.mp4
    alienresident · 2013-01-18 14:43:29 5
  • Rotate a video file by 90 degrees CW

    Transpose parameter: 0 = 90CounterCLockwise and Vertical Flip (default) 1 = 90Clockwise 2 = 90CounterClockwise 3 = 90Clockwise and Vertical Flip


    -1
    ffmpeg -i in.mov -vf "transpose=1" out.mov
    malathion · 2019-09-02 04:54:31 293
  • Download screenshot or frame from YouTube video at certain timestamp

    Downloads the frame of given YouTube video at 8 minutes 14 seconds. Requested format is "299", which 1080p only video.


    -1
    ffmpeg -ss 8:14 -i $(youtube-dl -f 299 --get-url URL) -vframes 1 -q:v 2 out.jpg
    bugmenot · 2021-07-06 10:59:49 192
  • Press enter and take a WebCam picture.

    Take a picture from your webcam and save it to a jpeg. A very slightly modified version of MarxBro's command.


    -3
    -y -r 1 -t 3 -f video4linux2 -vframes 1 -s sxga -i /dev/video0 ~/webcam-$(date +%m_%d_%Y_%H_%M).jpeg
    navyjeff · 2013-02-27 05:32:03 4
  • Convert a bunch of oggs into mp3s


    -5
    for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"
    iain · 2009-03-23 10:19:12 5
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bash shortcut: !$ !^ !* !:3 !:h and !:t
When expanding, bash output the command, so don't be affraid if you type the command. Here is the details: First examples: $echo foo bar foobar barfoo First argument: $echo !$ echo barfoo barfoo (Note that typing echo foo bar foobar barfoo && echo !$, bash substitute !$ with $:1) Last argument: $echo foo bar foobar barfoo && echo !^ echo foo bar foobar barfoo && echo barfoo foo bar foobar barfoo barfoo All the arguments: $echo !* echo foo bar foobar barfoo foo bar foobar barfoo The third argument: $echo foo bar foobar barfoo && echo !:3 echo foo bar foobar barfoo && echo foobar foo bar foobar barfoo foobar You may want to add {} for large numbers: echo !:{11} for example Now with path: $echo /usr/bin/foobar /usr/bin/foobar For the head: $echo !$:h echo /usr/bin /usr/bin And the tail: $echo !$:t echo foobar foobar You also may want to try !:h and !:t or !!3-4 for the third and the fourth (so !!:* == !!:1-$)

Print interface that is up and running

Quickest way to sort/display # of occurences

power off system in X hours form the current time, here X=2

Convert numbers to SI notation
converts any number on the 'stdin' to SI notation. My version limits to 3 digits of precious (working with 10% resistors).

convert a line to a space

Create a bunch of dummy files for testing
Sometimes I need to create a directory of files to operate on to test out some commandlinefu I am cooking up. The main thing is the range ({1..N}) expansion.

generate random ascii shape(no x11 needed!)

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Grab all .flv files from a webpage to the current working directory
I wanted all the 'hidden' .flv files from the http link in the command line; wget seemed appropriate, fed with output from lynx, grep the flv files and the normalised via sed (to remove the numeric bullet). Similar to the 'Grab mp3 files' fu. Replace link with your own, grep arg with something more interesting ;) See here for something along the same lines... http://www.commandlinefu.com/commands/view/1006/grab-mp3-files-from-your-favorite-netcasts-mp3blog-or-sites-that-often-have-good-mp3s Hope you find it useful! Improvements welcome, naturally.

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