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• How to concat multiple explicit image paths to video with ffmpeg

  22 juillet 2019, par jimboslice

  I am trying to figure out how to create a video from explicit paths to an image sequence.
  I am writing these images from Houdini.

  Instead of doing some kind of regex matching to replace $F3 with %03d I am trying to figure out how to concat the image paths into a video.

  I’m trying to do something like this :

  ffmpeg -y -framerate 12 -i -start_number 1 -i test_00001.jpg -start_number 2 -i test_00002.jpg -start_number 3 -i test_00003.jpg -start_number 4 -i test_00004.jpg -start_number 5 -i test_00005.jpg -start_number 6 -i test_00006.jpg -start_number 7 -i test_00007.jpg -start_number 8 -i test_00008.jpg -start_number 9 -i test_00009.jpg -filter_complex "concat=n=3" -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p $HOME/Desktop/test.mp4

  This result only plays a couple of frames in the result video

  If I write the images to a text file with the following format

  file '/Volumes/hqueue/projects/Fire/render/test_1.jpg'
file '/Volumes/hqueue/projects/Fire/render/test_2.jpg'
file '/Volumes/hqueue/projects/Fire/render/test_3.jpg'
file '/Volumes/hqueue/projects/Fire/render/test_4.jpg'
file '/Volumes/hqueue/projects/Fire/render/test_5.jpg'
file '/Volumes/hqueue/projects/Fire/render/test_6.jpg'
file '/Volumes/hqueue/projects/Fire/render/test_7.jpg

  and then run a command like the following
  ffmpeg -y -framerate 12 -f concat -i /var/folders/fy/8zlxyq497kz0nzgb1nqc9xf59rwbjm/T/image_list.txt -c:v libx264 -profile:v high -c copy -crf 20 -pix_fmt yuv420p $HOME/Desktop/test.mp4

  I get the following output

  [concat @ 0x7f870e809c00] Unsafe file name '/Volumes/hqueue/projects/Fire/render/test_1.jpg'
/var/folders/fy/8zlxyq497kz0nzgb1nqc9xf59rwbjm/T/image_list.txt: Operation not permitted

  Right now it’s producing a video, but only with a couple of the input frames.

• .NET FFmpeg wrapper for video playback [closed]

  12 février 2015, par SharpAffair

  Looking for an FFmpeg wrapper usable in .NET. The wrapper must support video playback with audio.

  The following projects are incomplete FFmpeg wrappers :

  http://code.google.com/p/ffmpeg-sharp/

  http://sourceforge.net/projects/sharpffmpeg/

  http://sourceforge.net/projects/ffqlay/

  http://www.ffmpeg-csharp.com/

  http://www.intuitive.sk/fflib/post/fflib-net-released.aspx

  ffmpeg-sharp is the closest thing I’ve found, but it’s also incomplete (no audio in video playback).

  I’m quite sure that stable proprietary wrappers do exist, so I will award the bounty to anyone willing to share the code or able to find a complete third-party version.

• How to display transparent GIFs using AutoHotkey script when pressing CapsLock ?

  8 juillet 2024, par Juan dalton

  I am trying to create a script in which if you press the capslock key a gif image appears on the screen, but the gif image appears with a solid black background, it is not transparent, what am I doing wrong ?

  


  ; Variable to track the state of Caps Lock
global capslock_toggle := false

; Path to the GIF file with transparency
ImagePath := "C:\Path\To\Your\Folder\animation.gif"

; Path to ffplay (adjust this line with the path to ffplay.exe)
ffplayPath := "C:\FFmpeg\bin\ffplay.exe"

; Variable to store the ID of the ffplay process
global ffplayPID

; Function to show the GIF using ffplay
ShowImage() {
    global
    Run, %ffplayPath% -autoexit -loop 0 -vf "format=rgba" -x 200 -y 200 -noborder -window_title "GifWindow" %ImagePath%,, Hide, ffplayPID
}

; Function to hide the GIF by closing ffplay
HideImage() {
    global
    if (ffplayPID) {
        Process, Close, %ffplayPID%
        ffplayPID := ""
    }
}

; Detect Caps Lock key press and toggle actions
CapsLock::
capslock_toggle := !capslock_toggle
if capslock_toggle
{
    ShowImage()  ; Show the GIF
}
else
{
    HideImage()  ; Hide the GIF
}
Return



  


  enter image description here

  


  I try to convert gif to webm but it doesn't work either