1 (edited by jimdogma7 23-07-2026 16:47:49)

Topic: SVP not working with SMplayer

I had the setup working great for a while and just today it stopped working again.  Has something changed over the past few days?

Typically, I'll open a video in SMplayer using the optional MPV engine and it works fine, now when I do it the player crashes and I get an error report that reads, "MPV has finished unexpectedly.  More info in the log."  Can someone help?  I've uploaded the logs.

Post's attachments

MPV log.log 1.38 kb, 11 downloads since 2026-07-23 

SMPlayer log.log 47.11 kb, 17 downloads since 2026-07-23 

SVP logs.txt 9.36 kb, 16 downloads since 2026-07-23 

Re: SVP not working with SMplayer

Here's another piece of info that might help.  ChatGPT suggested opening the mpv player directly from the SVP folder and then dragging a video in there to see if t worked.  An it didn't.  It just paused and crashed.  Now this is interesting because SVP actually works with MPC-HC.  So perhaps it is something with MVP player itself.  It's confusing becuase it worked for a long time and I changed nothing.  Now I can't get it to work at all.

Re: SVP not working with SMplayer

Update:  Did a complete uninstall of SVP and SMPlayer.  Reinstalled SVP only to see if I could get MPV player to work isolated from SMPlayer.  Did a full install, checked mpv player mpv shared library boxes, etc. etc., set the environmental variables, checked that the PATH was pointing to SVP/MPV and it still doesn't work.  The video starts, pauses as it usually does initially, and instead of the little logo that comes up in the lower left of the screen that indicates SVP is working, the video just disappears.  How could this happen?  I did a completely fresh install.  Again, it works fine with MPC-HC player.  AI chat says it must have something to do with vapoursynth but I don't know what that is or how to fix it... 

Chainik???  Anyone?

Re: SVP not working with SMplayer

More info that might help:  SVP works with MPC-HC but when I try to engage the RIFE engine, I get a warning sign in the lower right of the screen that says, "RIFE only works via Vapoursynth!"

Does this mean that Vapoursynth isn't installed or isn't working?  I thought Vapoursynth was included with the SVP installation package?

Re: SVP not working with SMplayer

Try this:
1. Playback file using SVP menu: Open file via mpv...
if it can't help
2. Rewrite environment variables using SVP menu: Utilities > Set environment variables for Vapoursynth...

---
Your mpv is not from SVP bundle.
SVP's mpv: ...VideoPlayer: mpv v0.41.0-dirty /via 'C:\Users\Andrey\AppData\Local\Temp/mpvSockets/13420'
Your mpv: ...VideoPlayer: mpv v0.37.0-522-ga56d8ff1 /via 'C:/Users/cmsre/AppData/Local/Temp/smplayer-mpv-39e0'

---
And this warning:

[W]: Playback [cd926636]: Frame server (64-bit) NOT FOUND

It is not normal.

Re: SVP not working with SMplayer

MAG79 wrote:

Try this:
1. Playback file using SVP menu: Open file via mpv...
if it can't help
2. Rewrite environment variables using SVP menu: Utilities > Set environment variables for Vapoursynth...

---
Your mpv is not from SVP bundle.
SVP's mpv: ...VideoPlayer: mpv v0.41.0-dirty /via 'C:\Users\Andrey\AppData\Local\Temp/mpvSockets/13420'
Your mpv: ...VideoPlayer: mpv v0.37.0-522-ga56d8ff1 /via 'C:/Users/cmsre/AppData/Local/Temp/smplayer-mpv-39e0'

---
And this warning:

[W]: Playback [cd926636]: Frame server (64-bit) NOT FOUND

It is not normal.


Thank you for responding to my quandry but I'm not sure what to do with it..  Before I even started this thread I tried opening a file via the SVP manager directly and I mentioned above that not only did I "set environment variables for Vapoursynth" within SVP manager I also manually went into "edit environmental varaiables" and made sure the path was there.  I even added the additional PYTHONPATH variable that was suggested in this article on your website:  https://www.svp-team.com/wiki/File:Vs-portable-env.png

Again, nothing has worked.  As far as my mpv not being from the SVP bundle, I'm not sure what to do about that.  Plus, what about the vapoursynth error I mentioned above happening in MPC-HC?  I'm not hugely technically inclined.  It would be nice to get a step by step process to get this to work again, even starting from scratch, which again I also have tried.  How could it not work going from a completely fresh install?!

7 (edited by jimdogma7 28-07-2026 13:52:58)

Re: SVP not working with SMplayer

Still waiting on some sort of resolution to the issue discussed above.  I'm unable to use the product until some movement is made.  If you need me to run some more error reports or something I'm happy to do that but the radio silence here is deafening.  Somehow Vapoursynth is not working, I think that may be the common issue with MPV player not working either standalone or with SMPlayer and with the error message I get with MPC-HC. 

I asket ChatGPT how I could install Vapoursynth myself to perhaps solve the problem and Chat said NOT to do this because it could interfere with the built-in path configuration etc., that SVP uses.  Chat said to have the SVP "development team" instruct me on how to correct their product.  That's what I'm trying to do here and am unsure what the problem is.  If there is no solution to the problem then please at least respond as so instead of just ignoring the issue.

Re: SVP not working with SMplayer

Install ChatGPT locally and tell it to play a video with SMplayer and fix any errors found.

Re: SVP not working with SMplayer

flowreen91 wrote:

Install ChatGPT locally and tell it to play a video with SMplayer and fix any errors found.


I was unable to have the AI run a program off my computer.  I fed it the error log, though, and this is what I got:

The error causing the failure is right here:

07:39:30.419 [E]: Playback [2aabad7a]: AVS - Crop: YUV image can only be cropped by Mod 2 (right side).\n(C:\Users\cmsre\AppData\Roaming\SVP4\scripts\2aabad7a.avs, line 66)

The Cause
You are playing a video with an odd-numbered width/height dimension (850x480), and when SVP attempts to crop the frame for 3D/Side-by-Side processing, the resulting resolution violates YUV color format requirements. Standard 4:2:0 YUV video formats require dimensions and cropping coordinates to be even numbers (Mod 2). Because 850 divided in half yields an odd dimension or an uneven split, AviSynth throws a crop error.

How to Fix It
Disable Auto-Crop for Odd-Resolution Files: In your SVP 4 settings under Applications or Video profiles, look for the cropping options and disable automatic black-border cropping for videos with non-standard or odd resolutions.

Re-encode the Video: Alternatively, resize or pad the source video beforehand so that both dimensions are cleanly divisible by 2 (or 4/16 for best compatibility with motion interpolation).


Unfortunately, this "fix" didn't work either.  I've attached a new error log, please some developer look at this so I can use the product again..

Post's attachments

active.log 16.54 kb, 11 downloads since 2026-07-29 

Re: SVP not working with SMplayer

> SVP works with MPC-HC but when I try to engage the RIFE engine, I get a warning sign in the lower right of the screen that says, "RIFE only works via Vapoursynth!"

this means RIFE/TensorRT works only via Vapoursynth Filter set in MPC-HC. Not via Avisynth Filter. Go to View -> Options -> External filters, uncheck Avisynth Filter, check Vapoursynth Filter.

> As far as my mpv not being from the SVP bundle, I'm not sure what to do about that.

choose mpv bundled with SVP as described there - https://www.svp-team.com/wiki/SVP:SMPlayer

11 (edited by jimdogma7 Yesterday 17:03:01)

Re: SVP not working with SMplayer

Chainik wrote:

> SVP works with MPC-HC but when I try to engage the RIFE engine, I get a warning sign in the lower right of the screen that says, "RIFE only works via Vapoursynth!"

this means RIFE/TensorRT works only via Vapoursynth Filter set in MPC-HC. Not via Avisynth Filter. Go to View -> Options -> External filters, uncheck Avisynth Filter, check Vapoursynth Filter.

> As far as my mpv not being from the SVP bundle, I'm not sure what to do about that.

choose mpv bundled with SVP as described there - https://www.svp-team.com/wiki/SVP:SMPlayer


Thanks for responding Chainik.  I have already tried everything you describe above.  I've attached screenshots of how I set the Vapoursynth filter (see Vapoursynth filter) and how the entire media player crashes after I did that (see MPC-HC crash).

As far a mpv bundled with SVP for SMPlayer, I've aready done that as well, to no avail.  (See attached screenshots 43 and 44).  Also, I've attached a screenshot showing that I've set the PATHs correctly in environmental variables (see screenshot 45).

If you read some of my posts from years ago I had problems with SVP not working with SMPlayer, but for the better part of a year or two, it's been working fine.  I have no idea what happened.  I changed nothing, and one day I woke up, fired up SMPlayer, and it stopped working.  I don't think the problem is with SMPlayer though, I think the problem is with mpv, because I can't even get the SVP internal mpv player to play a video, the video starts, pauses, and then disappears.  The standard fixes don't help, please don't say, just click the "set environmental variables for vapoursynth" in Utilities.  I'm way past that.  As I said, the whole thing was working for a year+  I'm not just setting this up for the first time.  What boggles my mind, though, is that doing a compete uninstall of SMplayer and SVP and then a reinstall still doesn't work.  If I were an SVP developer, I certainly would be intrigued and think of this as a challenge.  Please do and help.

I think the base and most important central clues to this mystery boil down to 1) The fact that I can't get a video to play through SVP's native mpv player and 2) the "RIFE only works via Vapoursynth!" error message in MPC-HC.  It would seem to me that the problem her is somehow focused on Vapoursynth.  But I'm not the developer of SVP, so I yield to you.

Post's attachments

Screenshot (44).png 230.7 kb, file has never been downloaded. 

Screenshot (45).jpg 308.07 kb, file has never been downloaded. 

Vapoursynth filter.png 195.47 kb, file has never been downloaded. 

Re: SVP not working with SMplayer

Chainik wrote:

> SVP works with MPC-HC but when I try to engage the RIFE engine, I get a warning sign in the lower right of the screen that says, "RIFE only works via Vapoursynth!"

this means RIFE/TensorRT works only via Vapoursynth Filter set in MPC-HC. Not via Avisynth Filter. Go to View -> Options -> External filters, uncheck Avisynth Filter, check Vapoursynth Filter.

> As far as my mpv not being from the SVP bundle, I'm not sure what to do about that.

choose mpv bundled with SVP as described there - https://www.svp-team.com/wiki/SVP:SMPlayer

Here's the last screenshot mentioned.

Post's attachments

Screenshot (43).png 264.1 kb, file has never been downloaded. 

Re: SVP not working with SMplayer

> I'm way past that

then show the correct logs of everything, because all I can see from the logs attached - you're running mpv bundled with SMPlayer

regarding "RIFE only works via Vapoursynth!" - again, the log! this message shouldn't appear with "Vapoursynth Filter" at all.

14 (edited by jimdogma7 Yesterday 18:19:36)

Re: SVP not working with SMplayer

The first log I'm uploading (SVP native mpv) is from where I right click the SVP icon in the system tray and scroll up to "Open file via mpv..."  I click that, it opens up a window to choose a video file to play, I click on a video, the video starts, then pauses a couple of seconds, and then completely disappears.  That's it.

The second log (MPC Vapoursynth warning) is from when I open a video in MPC-HC.  The log I'm uploading though, may be one where the AviSynth filter is activated.  When I apply "prefer" to the Vapoursynth filter to MPC-HC the player simply crashes instantly and gives the error message in the "MPC-HC crash" screenshot I uploaded in the last post.  If you want me to try something else, let me know.

EDIT:  I forgot to attach the "MPC-HC crash" screenshot so I just added it.

Post's attachments

MPC Vapoursynth warning.txt 17.72 kb, 1 downloads since 2026-07-31 

MPC-HC crash.png 93.74 kb, file has never been downloaded. 

SVP native mpv.log 10.1 kb, 1 downloads since 2026-07-31 

Re: SVP not working with SMplayer

and the log still tells "Main: PATH doesn't contain mpv64 folder, Vapoursynth Filter and libmpv players may not work"
run cmd, exec 'echo %PATH%'

when you double click "vapoursynth filter" in MPC-HC's "External filters" list - what happens?

Re: SVP not working with SMplayer

Chainik wrote:

and the log still tells "Main: PATH doesn't contain mpv64 folder, Vapoursynth Filter and libmpv players may not work"
run cmd, exec 'echo %PATH%'

when you double click "vapoursynth filter" in MPC-HC's "External filters" list - what happens?

I'm not exactly sure what you are asking, but this is my best guess.  The first screenshot is what I get when I double-click on the Vapoursynth filter in MPC-HC.  The second screenshot is when I doubleclick on the AviSynth filter.

Post's attachments

AviSynth.jpg 156.93 kb, file has never been downloaded. 

VapourSynth.jpg 172.95 kb, file has never been downloaded. 

Re: SVP not working with SMplayer

win+R, cmd, 'echo %PATH%'