vspreview: Wrong Length in Time

[poisondeathray]

Originally Posted by jay123210599

How do I remux a mkv file?

Use mkvtoolnix-gui, add the file, push "start multiplexing"

Originally Posted by jay123210599

How do I use that for my vspreview script?

add the line to your script after the source filter . It will look like something like this

clip = core.ffms2.Source(path to video)
clip = core.text.ClipInfo(clip)
clip.set_output()

[jay123210599]

Originally Posted by poisondeathray

What does

clip = core.text.ClipInfo(clip)

say about the length (frame count), and fps ?

@poisondeathray When using ffsm2. the length is 30926 frames and the fps is 24000/1001 (23.976024).

[poisondeathray]

Originally Posted by jay123210599

@poisondeathray When using ffsm2. the length is 30926 frames and the fps is 24000/1001 (23.976024).

30926 frames @ 24000/1001 CFR should be 21:29.871. Neither 23 minutes, or 18 minutes. Where are you getting 18 minutes from ?

Something might be wrong with that specific video - do the other source filters lsmash and bestsource give same result ?

If you check another random video, is it ok? Is problem only this specific video?


Did you try remuxing and testing again ?

When you open this video in vdub2 directly, what is the framecount and duration ?

What is the audio duration ?

Where is the full mediainfo report ? What other streams are there ? File size is 160MB, but video stream is only 105MB .

[jay123210599]

Originally Posted by poisondeathray

30926 frames @ 24000/1001 CFR should be 21:29.871. Neither 23 minutes, or 18 minutes. Where are you getting 18 minutes from ?

Something might be wrong with that specific video - do the other source filters lsmash and bestsource give same result ?

If you check another random video, is it ok? Is problem only this specific video?


Did you try remuxing and testing again ?

When you open this video in vdub2 directly, what is the framecount and duration ?

What is the audio duration ?

Where is the full mediainfo report ? What other streams are there ? File size is 160MB, but video stream is only 105MB .

Wait, I get it now. My video has two audio streams, one that last for 23 minutes and one that last for 21.

[LightArrowsEXE]

Originally Posted by jay123210599

"WARNING: Video Node 1: Had to assume these props which were unspecified or non-valid for preview <"_Matrix, _Primaries, _Transfer>"

Originally Posted by _Al_

That is vspreview warning most likely because like any other previewer, it has to change vs.VideoNode (your clip) into rgb. So if those values are not in props (they were not read from a source plugin) it has to guess and default.

Bit late of a response, but this is correct. I've made this warning a bit clearer, so hopefully it should be easier to understand should you run into it again.

2024-10-08 09:52:06.681: root: WARNING: Video Node 1: The following frame properties had to be assumed for previewing: <_Matrix=6 (SMPTE ST 170m), _Primaries=6 (SMPTE ST 170m), _Transfer=6 (BT.601)>
You may want to set explicit frame properties instead. See https://www.vapoursynth.com/doc/apireference.html#reserved-frame-properties for more information.