How to write a slideshow script for browsing pictures using 'vapoursynth'?

[avhp]

I want to use the following script to browse pictures, pausing for 15 seconds on each picture, but it only reads the first two pictures.

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video = core.bs.VideoSource(source=r'E:\001\%02d.jpg')
video = core.std.AssumeFPS(video,fpsnum=1, fpsden=15)
video = haf.ChangeFPS(video, 24000, 1001)
audio = core.bas.Source(r'E:\audio\xxx.mp3', track=-1)
audio.set_output(1)
video.set_output(0)


This is the script from avisynth, and it works great.

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v = ImageSource("I:\001\%02d.jpg", start=0, end=17, use_DevIL=true)
v = AssumeFPS(v, 1,16)
video = ChangeFPS(v, 25,1)
audio=DirectShowSource("E:\audio\xxx.mp3")
AudioDub(video,audio)


Can anyone help me with this problem?

[_Al_]

I'd use imwri plugin and python code to create a list of filepaths, it is more versatile and comforting than %xxxd syntax for reading images:

from vapoursynth import core
from pathlib import Path
from havsfunc import ChangeFPS

DIRECTORY = r'D:\images'
IMAGE_DURATION = 15  # seconds

if not hasattr(core, 'imwri'):
    raise AttributeError('vs-imwri plugin is needed to load images: https://github.com/vapoursynth/vs-imwri/releases')
images = Path(DIRECTORY).glob('IMG_*.JPG')  # loading images into a list using wild cards in image name
video = core.imwri.Read(filename=list(images))
video = core.std.AssumeFPS(video, fpsnum=1, fpsden=int(IMAGE_DURATION))
video = ChangeFPS(video, 24000, 1001)
audio = core.bas.Source(r'E:\audio\xxx.mp3', track=-1)
audio.set_output(1)
video.set_output(0)

In vapoursynth you have to pipe audio and video separately (preferably using vspipe) to encoders, and only then muxing video and audio. So how to cut audio length to video length would depend how you mux those streams.

[_Al_]

so basically you do not have to use audio in vapoursynth, just muxing your audio track to that encoded vapoursynth video stream

[avhp]

Thanks for @_Al_ for help, But it returned the error: ImportError: cannot import name 'Sequence' from 'collections'.

[poisondeathray]

Does it only read first 2 pictures with video only ?

Are you using most recent bestsource plugin ?
https://github.com/vapoursynth/bestsource/releases/

[avhp]

Thanks @poisondeathray for your attention to this issue. It does read only two images, 00.jpg and 01.jpg, and the image sizes are the same. It seems that it cannot automatically detect how many images are in the folder. Do you have any good solution?

[hydra3333]

A word to the wise ... if the pics have different sizes (eg HD or 4k) or different rotations in the metadata (eg portrait, landscape, 90 degrees, 180 degrees, etc) then you're in for a bit of a learning curve
Good luck.

PS _AI_ is brilliant at this stuff and IIRC has access to relevant code (or has my memory failed yet again).