[Duplicated]ffmpeg video decoder problem
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kinodegna last edited by kinodegna
@burnout426 it has happened after upgrading Windows 7 to Windows 10 with Media Creation Tool
I have created new Windows account, installed and tested on all 4 versions just after installation and had same problem on every of them. Didn't try Vivaldi there because it was first time I ever installed it.
And yes, it happens on video-only mp4 files. But if I create audio-only mp4 it plays fine
Also tried all fixes from Codec Tweak Tool > General > Fixes (including Reset Media Foundation). Even after system reboot nothing changes for the problem. -
burnout426 Volunteer last edited by
@kinodegna said in [Duplicated]ffmpeg video decoder problem:
it has happened after upgrading Windows 7 to Windows 10 with Media Creation Tool
Hmm, there could be something to that. I guess you could check your system files.
Installing Windows 10 from scratch (no upgrade) has a high probability of fixing it (unless it has something to do with the Enterprise version of Windows).
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kinodegna last edited by
@burnout426 already tried both dism and sfc. All system files are OK. It was my first idea.
And of course installing Windows from scratch will help. But I have no option to do it now. -
kinodegna last edited by
What is a difference between decoding h264 in Chrome/Edge (where is no issue) and Opera/Vivaldi?
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leocg Moderator Volunteer last edited by
@kinodegna Chrome/Edge has the license to use the h264 codec and don't depend on the OS for it like Opera and Vivaldi.
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burnout426 Volunteer last edited by
In Windows, at "Settings -> Apps -> Optional Features -> More Windows Features" (optionalfeatures.exe), instead of just checking if Windows Media Player is enabled under "Media Features", try removing Windows Media Player and then adding it back in.
I'm surprised that h.264 works in Windows Media Player but not in Opera. Under "Legacy Components", do you happen to have "Direct Play" enabled? It's not enabled here.
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burnout426 Volunteer last edited by
Are you running Opera and Vivaldi directly or via something like Sandboxie?
Any security software (anti-virus or other) that you're able to disable temporarily to see if it's interfering for some weird reason?
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kinodegna last edited by
@burnout426 only ESET NOD32 Antivirus. I've just removed it (and its services) from windows startup and re-tested. The problem is still present.
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kinodegna last edited by kinodegna
@burnout426 said in [Duplicated]ffmpeg video decoder problem:
Direct Play
What is it? How can check if it enabled?
I've removed WMP, check that it was actually removed after rebooting, then added the component back and rebooted again. WMP still plays h264 and Opera still can't.
Also, as I remember, the only thing that I have been asked to remove to continue updating Windows 7 to Windows 10 was Windows Media Player. But after update it was already installed.
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kinodegna last edited by kinodegna
Found Legacy Components in optionalfeatures.exe. It's not checked and child "Direct Play" also not checked.
I've enabled it and rebooted - no changes, disabled and rebooted - still no changes. -
burnout426 Volunteer last edited by
@kinodegna said in [Duplicated]ffmpeg video decoder problem:
"Direct Play"
It's the old way of providing codecs for Windows. It won't have any effect on Opera and Vivaldi, but I was wondering if that's how h.264 was still working in Windows Media Player.
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burnout426 Volunteer last edited by
You've basically tried everything you can. But, I'll let you know if I have any other ideas to try. Maybe it'll fix itself with the next major Windows update that comes out. Might be a bit though.
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kinodegna last edited by
Is there is a way to find what dlls (or other system files) my Opera tries to use for h264 decoding?
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burnout426 Volunteer last edited by
@kinodegna Not sure, but https://learn.microsoft.com/en-us/windows/win32/medfound/h-264-video-decoder lists Msmpeg2vdec.dll, which is in "C:\Windows\system32" for me.
I have file version 10.0.22621.1105 on Windows 11 Version 22H2 (Build 22621.1105) 64-bit.
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