1.8.8: video playback broken since 1.8.7

[dchristensen]

XnView: MP 1.8.8 64 bit, installed from .deb
OS: Linux: Ubuntu 22.04 64bit

In both 1.8.7 and 1.8.8, all videos I try to play within XnView don't play correctly. The audio plays and the progress bar updates, but the video just flickers between the same frames near the start.

Videos play back fine with 1.8.6.

To reproduce:
1. xnview . [in a folder containing a video]
2. open the video in a viewer tab
3. press the play button
Actual behaviour (bug): Video stutters on first few frames

Expected behaviour: All frames shown.

[xnview]

no problem here on clean ubuntu 22.04 if libva-dev & libvdpau-dev are installed

[dchristensen]

I don't think `-dev` packages should be needed unless building, but to be sure, I installed `libva-dev` and `libvdpau-dev`. Unfortunately, this didn't help. Note that if I downgrade to 1.8.6, video playback works again, so I have the correct packages installed to make it work with older versions.

I also tried creating a fresh user account, and can reproduce the issue there, so it doesn't have to do with my xnview settings.

Can I provide more information to help debug this? The only output shown when I hit the play button is `QMDKWidget play`, but maybe I can enable a debug log? Can you think of something that changed in 1.8.7 regarding video playback?

[xnview]

Please change in xnview.ini debug=2, and send me the logs?

[dchristensen]

Ok, I have generated a log file. I tried to attach it here, but it wouldn't accept a .txt file. Please let me know how to send it to you.

By the way, I don't know if it is related, but the thumbnails for my videos always show a 2x2 grid of an image. I have attached an image showing what I mean.

[xnview]

Ok, I have generated a log file. I tried to attach it here, but it wouldn't accept a .txt file. Please let me know how to send it to you.

by PM or on contact at xnview dot com

[aucora]

Same problem on Windows 10.

Unfortunately, even after going back to the old version, the playback is still laggy, and I don't know what's going on.

Even after reinstalling some computer's driver, it still didn't work.

And I found a situation, not all videos will play with errors. Then I set debug=2, when the problem occurs, the log seems to loop specific content, but it doesn't loop when playing normally. The log as follows:

#MDK SDK : 000001CD255ACE80 void __cdecl mdk::abi::MediaControlPush::setState(enum mdk::abi::State)@1101 requested state 1=>1, current state 2. status: 0X124

#MDK SDK : default FrameReader000001CD255404A0 request to pause 0, loaded: 4.

#MDK SDK : default FrameReader000001CD255404A0 state: 2=>1=>1, 0

#MDK SDK : default FrameReader000001CD255404A0 state: 2=>1=>1, 1

#MDK SDK : default FrameReader000001CD255404A0 update state: 2=>1

#MDK SDK : 000001CD255404A0 ***buffering progress 0%***

#MDK SDK : default 000001CD255404A0 FrameReader::update MediaStatus 0X124=>0X114

#MDK SDK : ++++++++++++BUFFERING START++++++++++++

#MDK SDK :
#MDK SDK : 000001CD255404A0 ***buffering progress 2%***

#MDK SDK : 000001CD255404A0 ***buffering progress 4%***

#MDK SDK : 000001CD255404A0 ***buffering progress 6%***

#MDK SDK : 000001CD255404A0 ***buffering progress 8%***

#MDK SDK : 000001CD255404A0 ***buffering progress 10%***

#MDK SDK : 000001CD255404A0 ***buffering progress 12%***

#MDK SDK : 000001CD255404A0 ***buffering progress 14%***

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#MDK SDK : default 000001CD255404A0 FrameReader::update MediaStatus 0X114=>0X124

#MDK SDK : ++++++++++++BUFFERING END++++++++++++

#MDK SDK :
#MDK SDK : 000001CD255404A0 ***buffering progress 0%***

#MDK SDK : default 000001CD255404A0 FrameReader::update MediaStatus 0X124=>0X114

#MDK SDK : ++++++++++++BUFFERING START++++++++++++

#MDK SDK :
#MDK SDK : 000001CD255404A0 ***buffering progress 2%***

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#MDK SDK : 000001CD255404A0 ***buffering progress 100%***

#MDK SDK : default 000001CD255404A0 FrameReader::update MediaStatus 0X114=>0X124

#MDK SDK : ++++++++++++BUFFERING END++++++++++++

#MDK SDK :
#MDK SDK : 000001CD255404A0 ***buffering progress 0%***

#MDK SDK : default 000001CD255404A0 FrameReader::update MediaStatus 0X124=>0X114

#MDK SDK : ++++++++++++BUFFERING START++++++++++++

#MDK SDK :
#MDK SDK : 000001CD255404A0 ***buffering progress 2%***

#MDK SDK : 000001CD255404A0 ***buffering progress 4%***

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#MDK SDK : 000001CD255404A0 ***buffering progress 100%***

#MDK SDK : default 000001CD255404A0 FrameReader::update MediaStatus 0X114=>0X124

#MDK SDK : ++++++++++++BUFFERING END++++++++++++

#MDK SDK :
#MDK SDK : 000001CD2548A0F0 player.set(2)

#MDK SDK : 000001CD255ACE80 void __cdecl mdk::abi::MediaControlPush::setState(enum mdk::abi::State)@1101 requested state 1=>2, current state 1. status: 0X124

#MDK SDK : default FrameReader000001CD255404A0 request to pause 1, loaded: 4.

#MDK SDK : default FrameReader000001CD255404A0 state: 1=>1=>2, 0

#MDK SDK : default FrameReader000001CD255404A0 state requested: 2, current: 1

#MDK SDK : default FrameReader000001CD255404A0 state: 1=>2=>2, 1

#MDK SDK : default FrameReader000001CD255404A0 update state: 1=>2

[dchristensen]

For the record, I just tested 1.9.0, and still have the same issue.

[xnview]

For the record, I just tested 1.9.0, and still have the same issue.

and in 1.8.6, all is correct?

[aucora]

After comparing different versions, I certain that the issue of certain videos being choppy started from version 1.8.4.

There are no problems with video playback in version 1.8.3.

Is it related to the following fix?

3469: [Bug] Mouse wheel doesn't work in preview - viewtopic.php?t=47122

If not, do I have any external methods to accelerate video buffering?

Additionally, when playing videos in the preview window in version 1.9.0, the buttons do not change, as shown in the figure.

[dchristensen]

For the record, I just tested 1.9.0, and still have the same issue.

and in 1.8.6, all is correct?

Yes. For me, 1.8.6 works and all of 1.8.7, 1.8.8, 1.9.0 all fail. And I'm on Ubuntu 22.04. So I think @aucora's issue is something different.

[aucora]

Eventually I solved the problem.

In xnview.ini, I modified useInternalVideoPlayer to false, and downloaded and installed LAV Filters.

Then the video can be played normally even in the latest version.

(At the same time, I turned off the maximum frame rate and maximum frame rate for background applications in the NVIDIA Control Panel, and made some other optimizations. It may also work.)

[aucora]

However, I must say that nothing can be smoother than version 1.8.3 itself.

I don't know if 1.8.4 made decoder changes.

[dchristensen]

Another point about my situation: I'm using a Lenovo X1 Extreme, which uses hybrid graphics (integrated Intel + discrete NVidia). I tested the machine in intel-only mode, NVidia mode, and on-demand mode, and the problem occurred for all three. Note sure if this is relevant, but I thought I would mention it. Version 1.8.6 works on this machine.

[aucora]

I don't think it's an issue with the hybrid graphics, because we both have some versions that work normally.

Apparently, an update in Xnview MP versions after v1.8 conflicted with the system.

At least on Windows 10, ​​the internal decoder update probably triggered this​​.