No MP4 Preview

[TestMeister]

Win 7 64 bit running XY 17.40.02

In XY other formats are ok and WMP plays MP4 ok...

[highend]

Does work fine in a VM...

Show a screenshot of Menu - Tools - Configuration - Preview - Previewed Formats - [x] Video Files (scrolled to the top)

and additionally try a fresh instance

[TestMeister]

Please see attached

Preview Pane- no options to play MP4

Preview Pane w MP4.png (175.92 KiB) Viewed 2553 times

Preview Video File Formats

Preview Video File Formats.png (25.52 KiB) Viewed 2553 times

[TestMeister]

Don, any ideas on this ?

[admin]

MIght be the specific file. Can you send me the file or a download link?

[TestMeister]

Working now and looks like I needed the k-lite codecs. Was clue-less about this since XY previewed all the other formats.
Why does MP4 need separate codecs?

[highend]

.mp4 is just a container for video / audio data. It can contain a lot of stuff (h264, h263, vc-1, etc.)
So to see if this is / was really a problem of the inbuilt mp4 codec of the Windows OS, you'd need to
upload the file / a non-reencoded part of it...

[TestMeister]

I tried to upload the MP4 file but it was blocked as an invalid file extension. Can you explain "non-reencoded part of it"?
Thanks

[highend]

The forum itself isn't the right place to upload videos

Use any filehoster (mega, dropbox, googledrive, whatever)

You need a tool that doesn't change any relevant codec params when cutting it into pieces
I for myself use ffmpeg (a command line tool) for such things but "mp4 split no reencoding"
as a google search should reveal a lot of tools.

[TestMeister]

Most of the MP4 files I have were downloaded from YouTube, and none have been modified by me.
Here is a link https://drive.google.com/open?id=0B9oYC ... V9vVDA0dkU

[highend]

Thanks for the link.

No, it's not a codec issue. XY does preview this file as well without any installed external codec(s).

So there is only one logical conclusion: A 3rd-party software product on your computer (my guess:
your player that is registered for .mp4 files) left the original mp4 codec in a non 100% working state
and the k-lite codec package installation fixed that issue

[TestMeister]

I have MP4 associated with VLC and the others with Cyberlink; so the MP4 codec alone could have been damaged and the other formats left intact?

[highend]

Judging from your former screenshot(s), Cyberlink was associated with .mp4, not VLC.
Cyberlink has been (haven't used it in years because of that) a monster regarding the modification
of registry entries and sure, one codec can be non functional while others are working fine

[TestMeister]

Right, forgot I changed it in my debugging; I just set it back to Cyberlink and it still works so perhaps the k-lite codecs are keeping it safe.
All is well so thanks for the help!