Commands tagged ffmpeg (83)

  • 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 13:44:46 440
  • 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 47
  • 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
  • mp4box is great when working with mp4s


    -1
    mp4box -info video.mp4
    alienresident · 2013-01-18 14:43:29 5
  • 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 04:54:31 292
  • 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
  • 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

  • -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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Kill all processes that listen to ports begin with 50 (50, 50x, 50xxx,...)
Run netstat as root (via sudo) to get the ID of the process listening on the desired socket. Use awk to 1) match the entry that is the listening socket, 2) matching the exact port (bounded by leading colon and end of column), 3) remove the trailing slash and process name from the last column, and finally 4) use the system(…) command to call kill to terminate the process. Two direct commands, netstat & awk, and one forked call to kill. This does kill the specific port instead of any port that starts with 50. I consider this to be safer.

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Which processes are listening on a specific port (e.g. port 80)
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Show what PID is listening on port 80 on Linux

Place the argument of the most recent command on the shell
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