Avisynth won't work properly on Windows 10...

[Julio C]

So I have a lot of videos at are in 25fps, and because of that the audio pitch sounds off.

To fix this, I used the following script:

DirectShowSource("filename")
AssumeFPS(24, true)

From here I save this on a AVS file, and I simply drag and drop that file to MPC-HC and the video now plays at 24fps with the audio sounding correct.

However, ever since I updated my OS from Windows 7 to Windows 10, Avisynth no longer works properly even after re-installing the application. When it plays the video, the audio is no longer in sync with the video stream.

So is there a work around this? I'm sorry if this been asked several times.

[qyot27]

The fault is in DirectShow itself, more than likely. You shouldn't be using DirectShowSource anyway - use FFMS2 or LSMASHSource. Make sure you're using the latest AviSynth+ (http://avisynth.nl/index.php/AviSynth%2B). Explicitly use sync_audio=true when using AssumeFPS.

[Julio C]

I tried using FFMS2 instead, but all I get is video and no audio at all. How do I get it to work?

[StainlessS]

Probably will not help at all, but try add ResampleAudio

DirectShowSource("filename") # Or any alternative is better as qyot27 said.
ORG=Last
AssumeFPS(24, sync_audio=true) # outputs non standard rate audio
ResampleAudio(ORG.Audiorate)

(clutching at straws, perhaps something is trying to match to a standard-ish audiorate)

EDIT:
but all I get is video and no audio

You tried FFAudioSource ?
http://avisynth.nl/index.php/FFmpegSource

[Julio C]

Well looks like I figure out what the problem is.

Apparently when I upgraded to Windows 10, the first thing it did when I first log in was that Win7DSFilterTweaker_4_6 suddenly opened, and I ignored it. I opened it just now, and change the prefer decoders from Microsoft to LAV Video or FFDshow.

Using the same old script now works!

Thanks for helping out you guys.

[qyot27]

I tried using FFMS2 instead, but all I get is video and no audio at all. How do I get it to work?

FFmpegSource2("filename",atrack=-1)

or

a=FFAudioSource("filename")
v=FFVideoSource("filename")
AudioDub(v,a)