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Preview Video Not Working

Posted: 02 Jun 2021 16:20
by Tanker IP
I have had this problem for a very long time and today decided to work on it. The video (mp4) plays but only audio comes out. The preview area shows a "screen area" but it is blank. The screen area size and dimension do change depending on the size of video selected (i.e. 720x480 or 360x240, etc).
I downloaded and installed K-lite Codec pack today (standard version) hoping it would fix the problem. Still nothing.

I can still play the video by double clicking on the files. Before today the default was VLC - now its MHC. I can fix this later. I have tried older avi files and vob files -- same action: Audio but no Video the preview screen window.

I downloaded and installed upgrade to 21.08 hoping that it would install a 64-bit version. I thought the download page said it would install either 32 or 64 bit as appropriate. The version as reported by Task Manager is still 32 bit. But maybe that really does not make a difference. Oh well.

This problem has been around for a long time for a lot people, I have scanned the forum and cannot find a suggestion that will work for me. Some people have had success; I thought the K-Lite would help like it did others, but no..........

Re: Preview Video Not Working

Posted: 02 Jun 2021 18:13
by Horst
If you provide a link to such a video I can try on my system with K-Lite_Codec_Pack_1620_Standard
and MPC-HC

Re: Preview Video Not Working

Posted: 02 Jun 2021 18:20
by Tanker IP
>Horst...thanks but it's not any one, particular, video. It is all videos: downloaded movies, home videos, video from tablets...alll.
I checked two other computers (they are laptops) that I have -- all windows 10.

One older has Xyplorer v 18 installed. It plays videos just fine without a hitch.

On very new with v 21 installed will play a video at all. Not even the audio portion. But it does display a thumbnail frm the video. What is that?

Is there a possibility that VLC player is causing this? When vlc is installed does it carry with it video codecs that impede the use of other codecs by other programs?

Re: Preview Video Not Working

Posted: 02 Jun 2021 18:39
by Horst
Tanker IP wrote: 02 Jun 2021 18:20 >Horst...thanks but it's not any one, particular, video. It is all videos: downloaded movies, home videos, video from tablets...alll.
I checked two other computers (they are laptops) that I have -- all windows 10.

One older has Xyplorer v 18 installed. It plays videos just fine without a hitch.

On very new with v 21 installed will play a video at all. Not even the audio portion. But it does display a thumbnail frm the video. What is that?

Is there a possibility that VLC player is causing this? When vlc is installed does it carry with it video codecs that impede the use of other codecs by other programs?
The VLC codecs are not changing anything for the installed codecs in Windows.
I had VLC installed before I moved to MPC-HC with the K-Lite Standard package.
Did you try this ?
Its easy to install and can be uninstalled with no problems.

Re: Preview Video Not Working

Posted: 02 Jun 2021 18:55
by sl23
I had issues some time ago with VLC not playing my home videos, but it's since been fixed. I always thought the files were corrupt, but after a year I found that it must've been a bug or something with VLC.

Re: Preview Video Not Working

Posted: 02 Jun 2021 19:08
by Horst
sl23 wrote: 02 Jun 2021 18:55 I had issues some time ago with VLC not playing my home videos, but it's since been fixed. I always thought the files were corrupt, but after a year I found that it must've been a bug or something with VLC.
And how is this related to the posters problems ?

Re: Preview Video Not Working

Posted: 02 Jun 2021 19:28
by highend
@Tanker IP

Execute fresh; from the address bar. Does it behave in the same way as your normal version?

Enable these two:
Configuration | Other | Shell Integration | 64-bit Windows | Use 64-bit preview handlers for preview
Configuration | Other | Shell Integration | 64-bit Windows | Fall back to preview handlers of the other bitness
Still a no?

Re: Preview Video Not Working

Posted: 02 Jun 2021 21:01
by sl23
it was just to point out that a codec could be the issue. Sorry for interfering

Re: Preview Video Not Working

Posted: 02 Jun 2021 23:58
by Tanker IP
>Highend

I tried the configuration changes you suggested on my one laptop that I have had trouble with. It still did the same thing when I selected a video: The preview window showed a still image and the data to the right said "Previewed as a thumbnail" I checked the Config|Preview| ... Autoplay is selected.

I will try your suggestion on my desktop computer to see if it might help that computer. Thanks for suggestion anyway.

Re: Preview Video Not Working

Posted: 05 Jun 2021 04:41
by Tanker IP
UPDATE I have been trying various configurations. I uninstalled, re-installed, loaded the K-lite files, etc. Then after rechecking I see that preview works correctly with .AVI files. It does not work with MP4 and MKV video files. When those latter two files are selected, the preview will display "Loading" then it switches to "Cannot decode".

Anybody have a suggestion here?

Next I will go my other computers and check if their response is exactly the same as this laptop.

Re: Preview Video Not Working

Posted: 05 Jun 2021 10:00
by highend
the preview will display "Loading" then it switches to "Cannot decode"
As long as e.g. .mkv is in
Configuration | Preview | Previewed Formats | [x] Video Files
and nowhere else and it's entry in it is checked

it's probably still a codec problem if it can't be decoded anymore

That you can still play files via VLC is totally normal because it brings its own codecs and is not using the system ones.

Can you still play such a non decodable .mkv in Windows Media Player?

Re: Preview Video Not Working

Posted: 05 Jun 2021 15:26
by Horst
You may try to assign the video formats which are not correctly previewed to the
Windows Media Player Rich Preview Handler
Use the Preview Handler Association Editor.
https://docs.microsoft.com/de-de/archiv ... ion-editor
Screenshot - 05.06.2021 , 15_22_14.png
Screenshot - 05.06.2021 , 15_22_14.png (12.56 KiB) Viewed 2201 times
Remove the "Only show ..." option and assign the additional extensions.
Its working without any restarts.
XYplorer preview will then hopefully show a Media player screen and you can push the start button.

Re: Preview Video Not Working

Posted: 05 Jun 2021 16:33
by Tanker IP
UPDATE #2 Well, well........ My WMP is not working it seems. At least here on my desktop. It freezes everytime I try to play something.

Question: Is Xyplorer preview for videos supposed to be tied/linked to Windows Media Player in some fashion? If I get my Windows Media Player working, then I have a better chance of having XYplorer running correctly in preview?

Thanks to highend and horst for their contributions.

Re: Preview Video Not Working

Posted: 05 Jun 2021 16:52
by Horst
Tanker IP wrote: 05 Jun 2021 16:33 UPDATE #2 Well, well........ My WMP is not working it seems. At least here on my desktop. It freezes everytime I try to play something.

Question: Is Xyplorer preview for videos supposed to be tied/linked to Windows Media Player in some fashion? If I get my Windows Media Player working, then I have a better chance of having XYplorer running correctly in preview?

Thanks to highend and horst for their contributions.
For me there is a link to the Windows Media player if I assign the extensions as explained above.
Without this XY previews the video without any Media player screen and without the need to hit a start button.
The Windows media player works fine for all sort of videos after the setup of the K-Lite package which includes to support the player.
I don't use it as the MPC-HD is much better for me.

Re: Preview Video Not Working

Posted: 05 Jun 2021 16:57
by admin
In the Preview tab (F12) XY attempts to view videos directly through quartz.dll (aka DirectShow). In the Preview Pane (Ctrl+F11) it goes via WMP. (Unless tweaked otherwise)