19.1 renders mp4 files out of sync

I have noticed that mp4 renders in version 19.1 are out of sync--the sound is slightly early. If I change to rendering in quicktime, the problem goes away. I did not have this problem in earlier versions of Davinci Resolve, although I can't say for certain the exact version when the problem started. But it's only been very recent.

I have tried different codecs and encoders, but the problem persists. The only workaround I have found is to export to quicktime.

Has anyone else seen this issue? I believe it's a problem with the new release of DR.

viewtopic.php?f=21&t=211694

Seems to be an issue with the native Windows media player. For now (actually, probably from now on) use this instead.

https://potplayer.tv/

Seems to be an issue with the native Windows media player. For now (actually, probably from now on) use this instead.

https://potplayer.tv/

hows this vs VLC media player?

It’s a native windows player problem, if you use player with different decoder like vlc, QuickTime, media player classic, resolve itself, another NLE, load on YouTube, and more, all work fine.
Recently I did a test also moving between media encoder these files and out of sync stay , but only under video player of win 10


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[Dwaine Maggart]

To be specific, it's only an issue with Windows 10 media players. It's not an issue on Windows 11.

Good to know, thanks

hows this vs VLC media player?

I would say just as capable, but I prefer the PotPlayer skins. (Particularly the BlackSpace_en skin.)

[Dwaine Maggart]

This has been addressed in the 19.1.1 release. When you are rendering MP4 files, you'll have a new "Enable compatibility with legacy players" option. You should select this if you want the files to play nicely with Windows 10 media player apps.

win10_mp4_render_option.png (49.16 KiB) Viewed 3404 times

Out of curiosity, is there a reason this wouldn't just be on by default? Are there any side-effects?

This has been addressed in the 19.1.1 release. When you are rendering MP4 files, you'll have a new "Enable compatibility with legacy players" option. You should select this if you want the files to play nicely with Windows 10 media player apps.

win10_mp4_render_option.png

Thank you, this has been driving me nuts for a week now.

is this in any case related to the ffmpeg"-x264opts b_pyramid=0"? as that was something that was needed for a long time to get the mp4 files to be in sync in Adobe Premiere have not used premiere for many years but files encoded like this have played okay everywhere so far. would be good to know if resolve now has the same option

Just to add my thanks for pointing this out...

Thank you very much!!
This has been driving me crazy for a few weeks.
And the solution I found is to switch to watching in VLC and as they wrote here... when uploading to YouTube there is also no problem with the final product.
But when you send a video to a client and he opens it in WINDOWS Media Player, from his point of view it is your fault because the other files on his computer work very well...
Thank you very much for the solution.